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authorArnd Bergmann <arnd@arndb.de>2012-09-04 15:01:37 +0200
committerArnd Bergmann <arnd@arndb.de>2012-09-04 15:01:37 +0200
commit863e99a8c1ea2b0391491904297f57a0f6a1fdd6 (patch)
tree0e7789f83c0ba3a1bc3c19d3ccf5ea6f84f19db6 /drivers/i2c
parentdd9bf78040fa0da4cecc228e1682b9682b8cb180 (diff)
parenta849088aa1552b1a28eea3daff599ee22a734ae3 (diff)
downloadlinux-linaro-stable-863e99a8c1ea2b0391491904297f57a0f6a1fdd6.tar.gz
Merge commit 'a849088aa1' from rmk/fixes into cleanup/io-pci
As Stephen Rothwell reports, a849088aa155 ("ARM: Fix ioremap() of address zero") from the arm-current tree and commit c2794437091a ("ARM: Add fixed PCI i/o mapping") from the arm-soc tree conflict in a nontrivial way in arch/arm/mm/mmu.c. Rob Herring explains: The PCI i/o reserved area has a dummy physical address of 0 and needs to be skipped by ioremap searches. So we don't set VM_ARM_STATIC_MAPPING to prevent matches by ioremap. The vm_struct settings don't really matter when we do the real mapping of the i/o space. Since commit a849088aa155 is at the start of the fixes branch in the arm tree, we can merge it into the branch that contains the other ioremap changes. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/Kconfig13
-rw-r--r--drivers/i2c/busses/i2c-ali1535.c13
-rw-r--r--drivers/i2c/busses/i2c-ali1563.c14
-rw-r--r--drivers/i2c/busses/i2c-ali15x3.c13
-rw-r--r--drivers/i2c/busses/i2c-amd756.c13
-rw-r--r--drivers/i2c/busses/i2c-amd8111.c13
-rw-r--r--drivers/i2c/busses/i2c-at91.c13
-rw-r--r--drivers/i2c/busses/i2c-bfin-twi.c147
-rw-r--r--drivers/i2c/busses/i2c-designware-pcidrv.c12
-rw-r--r--drivers/i2c/busses/i2c-diolan-u2c.c3
-rw-r--r--drivers/i2c/busses/i2c-eg20t.c12
-rw-r--r--drivers/i2c/busses/i2c-hydra.c17
-rw-r--r--drivers/i2c/busses/i2c-i801.c343
-rw-r--r--drivers/i2c/busses/i2c-imx.c76
-rw-r--r--drivers/i2c/busses/i2c-intel-mid.c13
-rw-r--r--drivers/i2c/busses/i2c-mv64xxx.c133
-rw-r--r--drivers/i2c/busses/i2c-mxs.c68
-rw-r--r--drivers/i2c/busses/i2c-nforce2.c14
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c210
-rw-r--r--drivers/i2c/busses/i2c-ocores.c113
-rw-r--r--drivers/i2c/busses/i2c-octeon.c92
-rw-r--r--drivers/i2c/busses/i2c-omap.c160
-rw-r--r--drivers/i2c/busses/i2c-pasemi.c13
-rw-r--r--drivers/i2c/busses/i2c-piix4.c209
-rw-r--r--drivers/i2c/busses/i2c-pmcmsp.c3
-rw-r--r--drivers/i2c/busses/i2c-pnx.c19
-rw-r--r--drivers/i2c/busses/i2c-powermac.c157
-rw-r--r--drivers/i2c/busses/i2c-puv3.c15
-rw-r--r--drivers/i2c/busses/i2c-pxa-pci.c12
-rw-r--r--drivers/i2c/busses/i2c-pxa.c7
-rw-r--r--drivers/i2c/busses/i2c-s3c2410.c6
-rw-r--r--drivers/i2c/busses/i2c-sis630.c15
-rw-r--r--drivers/i2c/busses/i2c-sis96x.c15
-rw-r--r--drivers/i2c/busses/i2c-stu300.c102
-rw-r--r--drivers/i2c/busses/i2c-tegra.c134
-rw-r--r--drivers/i2c/busses/i2c-tiny-usb.c1
-rw-r--r--drivers/i2c/busses/i2c-via.c14
-rw-r--r--drivers/i2c/i2c-core.c60
-rw-r--r--drivers/i2c/i2c-smbus.c13
-rw-r--r--drivers/i2c/muxes/i2c-mux-pca9541.c2
40 files changed, 1310 insertions, 992 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 7244c8be6063..b4aaa1bd6728 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -133,7 +133,7 @@ config I2C_PIIX4
ATI IXP300
ATI IXP400
ATI SB600
- ATI SB700
+ ATI SB700/SP5100
ATI SB800
AMD Hudson-2
Serverworks OSB4
@@ -143,6 +143,10 @@ config I2C_PIIX4
Serverworks HT-1100
SMSC Victory66
+ Some AMD chipsets contain two PIIX4-compatible SMBus
+ controllers. This driver will attempt to use both controllers
+ on the SB700/SP5100, if they have been initialized by the BIOS.
+
This driver can also be built as a module. If so, the module
will be called i2c-piix4.
@@ -458,7 +462,7 @@ config I2C_MPC
config I2C_MV64XXX
tristate "Marvell mv64xxx I2C Controller"
- depends on (MV64X60 || PLAT_ORION) && EXPERIMENTAL
+ depends on (MV64X60 || PLAT_ORION)
help
If you say yes to this option, support will be included for the
built-in I2C interface on the Marvell 64xxx line of host bridges.
@@ -479,10 +483,11 @@ config I2C_MXS
config I2C_NOMADIK
tristate "ST-Ericsson Nomadik/Ux500 I2C Controller"
- depends on PLAT_NOMADIK
+ depends on ARM_AMBA
help
If you say yes to this option, support will be included for the
- I2C interface from ST-Ericsson's Nomadik and Ux500 architectures.
+ I2C interface from ST-Ericsson's Nomadik and Ux500 architectures,
+ as well as the STA2X11 PCIe I/O HUB.
config I2C_NUC900
tristate "NUC900 I2C Driver"
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index e66d248fc126..125cd8e0ad25 100644
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -531,15 +531,7 @@ static struct pci_driver ali1535_driver = {
.remove = __devexit_p(ali1535_remove),
};
-static int __init i2c_ali1535_init(void)
-{
- return pci_register_driver(&ali1535_driver);
-}
-
-static void __exit i2c_ali1535_exit(void)
-{
- pci_unregister_driver(&ali1535_driver);
-}
+module_pci_driver(ali1535_driver);
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"Philip Edelbrock <phil@netroedge.com>, "
@@ -547,6 +539,3 @@ MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"and Dan Eaton <dan.eaton@rocketlogix.com>");
MODULE_DESCRIPTION("ALI1535 SMBus driver");
MODULE_LICENSE("GPL");
-
-module_init(i2c_ali1535_init);
-module_exit(i2c_ali1535_exit);
diff --git a/drivers/i2c/busses/i2c-ali1563.c b/drivers/i2c/busses/i2c-ali1563.c
index 47ae0091e027..e02d9f86c6a0 100644
--- a/drivers/i2c/busses/i2c-ali1563.c
+++ b/drivers/i2c/busses/i2c-ali1563.c
@@ -431,18 +431,6 @@ static struct pci_driver ali1563_pci_driver = {
.remove = __devexit_p(ali1563_remove),
};
-static int __init ali1563_init(void)
-{
- return pci_register_driver(&ali1563_pci_driver);
-}
-
-module_init(ali1563_init);
-
-static void __exit ali1563_exit(void)
-{
- pci_unregister_driver(&ali1563_pci_driver);
-}
-
-module_exit(ali1563_exit);
+module_pci_driver(ali1563_pci_driver);
MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c
index 087ea9caa74d..ce8d26d053a5 100644
--- a/drivers/i2c/busses/i2c-ali15x3.c
+++ b/drivers/i2c/busses/i2c-ali15x3.c
@@ -513,21 +513,10 @@ static struct pci_driver ali15x3_driver = {
.remove = __devexit_p(ali15x3_remove),
};
-static int __init i2c_ali15x3_init(void)
-{
- return pci_register_driver(&ali15x3_driver);
-}
-
-static void __exit i2c_ali15x3_exit(void)
-{
- pci_unregister_driver(&ali15x3_driver);
-}
+module_pci_driver(ali15x3_driver);
MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl>, "
"Philip Edelbrock <phil@netroedge.com>, "
"and Mark D. Studebaker <mdsxyz123@yahoo.com>");
MODULE_DESCRIPTION("ALI15X3 SMBus driver");
MODULE_LICENSE("GPL");
-
-module_init(i2c_ali15x3_init);
-module_exit(i2c_ali15x3_exit);
diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c
index eb778bf15c18..304aa03b57b2 100644
--- a/drivers/i2c/busses/i2c-amd756.c
+++ b/drivers/i2c/busses/i2c-amd756.c
@@ -410,21 +410,10 @@ static struct pci_driver amd756_driver = {
.remove = __devexit_p(amd756_remove),
};
-static int __init amd756_init(void)
-{
- return pci_register_driver(&amd756_driver);
-}
-
-static void __exit amd756_exit(void)
-{
- pci_unregister_driver(&amd756_driver);
-}
+module_pci_driver(amd756_driver);
MODULE_AUTHOR("Merlin Hughes <merlin@merlin.org>");
MODULE_DESCRIPTION("AMD756/766/768/8111 and nVidia nForce SMBus driver");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(amd756_smbus);
-
-module_init(amd756_init)
-module_exit(amd756_exit)
diff --git a/drivers/i2c/busses/i2c-amd8111.c b/drivers/i2c/busses/i2c-amd8111.c
index e5ac53b99b04..0919ac1d99aa 100644
--- a/drivers/i2c/busses/i2c-amd8111.c
+++ b/drivers/i2c/busses/i2c-amd8111.c
@@ -491,15 +491,4 @@ static struct pci_driver amd8111_driver = {
.remove = __devexit_p(amd8111_remove),
};
-static int __init i2c_amd8111_init(void)
-{
- return pci_register_driver(&amd8111_driver);
-}
-
-static void __exit i2c_amd8111_exit(void)
-{
- pci_unregister_driver(&amd8111_driver);
-}
-
-module_init(i2c_amd8111_init);
-module_exit(i2c_amd8111_exit);
+module_pci_driver(amd8111_driver);
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 1679deef9c89..e24484beef07 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -279,30 +279,31 @@ static int __devexit at91_i2c_remove(struct platform_device *pdev)
/* NOTE: could save a few mA by keeping clock off outside of at91_xfer... */
-static int at91_i2c_suspend(struct platform_device *pdev, pm_message_t mesg)
+static int at91_i2c_suspend(struct device *dev)
{
clk_disable(twi_clk);
return 0;
}
-static int at91_i2c_resume(struct platform_device *pdev)
+static int at91_i2c_resume(struct device *dev)
{
return clk_enable(twi_clk);
}
+static SIMPLE_DEV_PM_OPS(at91_i2c_pm, at91_i2c_suspend, at91_i2c_resume);
+#define AT91_I2C_PM (&at91_i2c_pm)
+
#else
-#define at91_i2c_suspend NULL
-#define at91_i2c_resume NULL
+#define AT91_I2C_PM NULL
#endif
static struct platform_driver at91_i2c_driver = {
.probe = at91_i2c_probe,
.remove = __devexit_p(at91_i2c_remove),
- .suspend = at91_i2c_suspend,
- .resume = at91_i2c_resume,
.driver = {
.name = "at91_i2c",
.owner = THIS_MODULE,
+ .pm = AT91_I2C_PM,
},
};
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index cdb59e5b23f7..0cf780fd6ef1 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -25,6 +25,7 @@
#include <asm/blackfin.h>
#include <asm/portmux.h>
#include <asm/irq.h>
+#include <asm/bfin_twi.h>
/* SMBus mode*/
#define TWI_I2C_MODE_STANDARD 1
@@ -32,56 +33,6 @@
#define TWI_I2C_MODE_COMBINED 3
#define TWI_I2C_MODE_REPEAT 4
-struct bfin_twi_iface {
- int irq;
- spinlock_t lock;
- char read_write;
- u8 command;
- u8 *transPtr;
- int readNum;
- int writeNum;
- int cur_mode;
- int manual_stop;
- int result;
- struct i2c_adapter adap;
- struct completion complete;
- struct i2c_msg *pmsg;
- int msg_num;
- int cur_msg;
- u16 saved_clkdiv;
- u16 saved_control;
- void __iomem *regs_base;
-};
-
-
-#define DEFINE_TWI_REG(reg, off) \
-static inline u16 read_##reg(struct bfin_twi_iface *iface) \
- { return bfin_read16(iface->regs_base + (off)); } \
-static inline void write_##reg(struct bfin_twi_iface *iface, u16 v) \
- { bfin_write16(iface->regs_base + (off), v); }
-
-DEFINE_TWI_REG(CLKDIV, 0x00)
-DEFINE_TWI_REG(CONTROL, 0x04)
-DEFINE_TWI_REG(SLAVE_CTL, 0x08)
-DEFINE_TWI_REG(SLAVE_STAT, 0x0C)
-DEFINE_TWI_REG(SLAVE_ADDR, 0x10)
-DEFINE_TWI_REG(MASTER_CTL, 0x14)
-DEFINE_TWI_REG(MASTER_STAT, 0x18)
-DEFINE_TWI_REG(MASTER_ADDR, 0x1C)
-DEFINE_TWI_REG(INT_STAT, 0x20)
-DEFINE_TWI_REG(INT_MASK, 0x24)
-DEFINE_TWI_REG(FIFO_CTL, 0x28)
-DEFINE_TWI_REG(FIFO_STAT, 0x2C)
-DEFINE_TWI_REG(XMT_DATA8, 0x80)
-DEFINE_TWI_REG(XMT_DATA16, 0x84)
-DEFINE_TWI_REG(RCV_DATA8, 0x88)
-DEFINE_TWI_REG(RCV_DATA16, 0x8C)
-
-static const u16 pin_req[2][3] = {
- {P_TWI0_SCL, P_TWI0_SDA, 0},
- {P_TWI1_SCL, P_TWI1_SDA, 0},
-};
-
static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
unsigned short twi_int_status)
{
@@ -99,7 +50,7 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
*/
else if (iface->cur_mode == TWI_I2C_MODE_COMBINED)
write_MASTER_CTL(iface,
- read_MASTER_CTL(iface) | MDIR | RSTART);
+ read_MASTER_CTL(iface) | MDIR);
else if (iface->manual_stop)
write_MASTER_CTL(iface,
read_MASTER_CTL(iface) | STOP);
@@ -107,10 +58,10 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
iface->cur_msg + 1 < iface->msg_num) {
if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD)
write_MASTER_CTL(iface,
- read_MASTER_CTL(iface) | RSTART | MDIR);
+ read_MASTER_CTL(iface) | MDIR);
else
write_MASTER_CTL(iface,
- (read_MASTER_CTL(iface) | RSTART) & ~MDIR);
+ read_MASTER_CTL(iface) & ~MDIR);
}
}
if (twi_int_status & RCVSERV) {
@@ -130,17 +81,25 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
}
iface->transPtr++;
iface->readNum--;
- } else if (iface->manual_stop) {
- write_MASTER_CTL(iface,
- read_MASTER_CTL(iface) | STOP);
- } else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
- iface->cur_msg + 1 < iface->msg_num) {
- if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD)
- write_MASTER_CTL(iface,
- read_MASTER_CTL(iface) | RSTART | MDIR);
- else
+ }
+
+ if (iface->readNum == 0) {
+ if (iface->manual_stop) {
+ /* Temporary workaround to avoid possible bus stall -
+ * Flush FIFO before issuing the STOP condition
+ */
+ read_RCV_DATA16(iface);
write_MASTER_CTL(iface,
- (read_MASTER_CTL(iface) | RSTART) & ~MDIR);
+ read_MASTER_CTL(iface) | STOP);
+ } else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
+ iface->cur_msg + 1 < iface->msg_num) {
+ if (iface->pmsg[iface->cur_msg + 1].flags & I2C_M_RD)
+ write_MASTER_CTL(iface,
+ read_MASTER_CTL(iface) | MDIR);
+ else
+ write_MASTER_CTL(iface,
+ read_MASTER_CTL(iface) & ~MDIR);
+ }
}
}
if (twi_int_status & MERR) {
@@ -193,7 +152,8 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
return;
}
if (twi_int_status & MCOMP) {
- if ((read_MASTER_CTL(iface) & MEN) == 0 &&
+ if (twi_int_status & (XMTSERV | RCVSERV) &&
+ (read_MASTER_CTL(iface) & MEN) == 0 &&
(iface->cur_mode == TWI_I2C_MODE_REPEAT ||
iface->cur_mode == TWI_I2C_MODE_COMBINED)) {
iface->result = -1;
@@ -221,7 +181,7 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
write_MASTER_CTL(iface,
read_MASTER_CTL(iface) & ~RSTART);
} else if (iface->cur_mode == TWI_I2C_MODE_REPEAT &&
- iface->cur_msg+1 < iface->msg_num) {
+ iface->cur_msg + 1 < iface->msg_num) {
iface->cur_msg++;
iface->transPtr = iface->pmsg[iface->cur_msg].buf;
iface->writeNum = iface->readNum =
@@ -241,27 +201,29 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
}
}
- if (iface->pmsg[iface->cur_msg].len <= 255)
- write_MASTER_CTL(iface,
+ if (iface->pmsg[iface->cur_msg].len <= 255) {
+ write_MASTER_CTL(iface,
(read_MASTER_CTL(iface) &
(~(0xff << 6))) |
- (iface->pmsg[iface->cur_msg].len << 6));
- else {
+ (iface->pmsg[iface->cur_msg].len << 6));
+ iface->manual_stop = 0;
+ } else {
write_MASTER_CTL(iface,
(read_MASTER_CTL(iface) |
(0xff << 6)));
iface->manual_stop = 1;
}
- /* remove restart bit and enable master receive */
- write_MASTER_CTL(iface,
- read_MASTER_CTL(iface) & ~RSTART);
+ /* remove restart bit before last message */
+ if (iface->cur_msg + 1 == iface->msg_num)
+ write_MASTER_CTL(iface,
+ read_MASTER_CTL(iface) & ~RSTART);
} else {
iface->result = 1;
write_INT_MASK(iface, 0);
write_MASTER_CTL(iface, 0);
}
+ complete(&iface->complete);
}
- complete(&iface->complete);
}
/* Interrupt handler */
@@ -298,8 +260,8 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
if (!(read_CONTROL(iface) & TWI_ENA))
return -ENXIO;
- while (read_MASTER_STAT(iface) & BUSBUSY)
- yield();
+ if (read_MASTER_STAT(iface) & BUSBUSY)
+ return -EAGAIN;
iface->pmsg = msgs;
iface->msg_num = num;
@@ -311,7 +273,8 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
return -EINVAL;
}
- iface->cur_mode = TWI_I2C_MODE_REPEAT;
+ if (iface->msg_num > 1)
+ iface->cur_mode = TWI_I2C_MODE_REPEAT;
iface->manual_stop = 0;
iface->transPtr = pmsg->buf;
iface->writeNum = iface->readNum = pmsg->len;
@@ -356,6 +319,7 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
/* Master enable */
write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN |
+ (iface->msg_num > 1 ? RSTART : 0) |
((iface->read_write == I2C_SMBUS_READ) ? MDIR : 0) |
((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ > 100) ? FAST : 0));
SSYNC();
@@ -398,8 +362,8 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
if (!(read_CONTROL(iface) & TWI_ENA))
return -ENXIO;
- while (read_MASTER_STAT(iface) & BUSBUSY)
- yield();
+ if (read_MASTER_STAT(iface) & BUSBUSY)
+ return -EAGAIN;
iface->writeNum = 0;
iface->readNum = 0;
@@ -520,7 +484,7 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
else
write_MASTER_CTL(iface, 0x1 << 6);
/* Master enable */
- write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN |
+ write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN | RSTART |
((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ>100) ? FAST : 0));
break;
default:
@@ -611,9 +575,9 @@ static struct i2c_algorithm bfin_twi_algorithm = {
.functionality = bfin_twi_functionality,
};
-static int i2c_bfin_twi_suspend(struct platform_device *pdev, pm_message_t state)
+static int i2c_bfin_twi_suspend(struct device *dev)
{
- struct bfin_twi_iface *iface = platform_get_drvdata(pdev);
+ struct bfin_twi_iface *iface = dev_get_drvdata(dev);
iface->saved_clkdiv = read_CLKDIV(iface);
iface->saved_control = read_CONTROL(iface);
@@ -626,14 +590,14 @@ static int i2c_bfin_twi_suspend(struct platform_device *pdev, pm_message_t state
return 0;
}
-static int i2c_bfin_twi_resume(struct platform_device *pdev)
+static int i2c_bfin_twi_resume(struct device *dev)
{
- struct bfin_twi_iface *iface = platform_get_drvdata(pdev);
+ struct bfin_twi_iface *iface = dev_get_drvdata(dev);
int rc = request_irq(iface->irq, bfin_twi_interrupt_entry,
- 0, pdev->name, iface);
+ 0, to_platform_device(dev)->name, iface);
if (rc) {
- dev_err(&pdev->dev, "Can't get IRQ %d !\n", iface->irq);
+ dev_err(dev, "Can't get IRQ %d !\n", iface->irq);
return -ENODEV;
}
@@ -646,6 +610,9 @@ static int i2c_bfin_twi_resume(struct platform_device *pdev)
return 0;
}
+static SIMPLE_DEV_PM_OPS(i2c_bfin_twi_pm,
+ i2c_bfin_twi_suspend, i2c_bfin_twi_resume);
+
static int i2c_bfin_twi_probe(struct platform_device *pdev)
{
struct bfin_twi_iface *iface;
@@ -695,7 +662,8 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
p_adap->timeout = 5 * HZ;
p_adap->retries = 3;
- rc = peripheral_request_list(pin_req[pdev->id], "i2c-bfin-twi");
+ rc = peripheral_request_list((unsigned short *)pdev->dev.platform_data,
+ "i2c-bfin-twi");
if (rc) {
dev_err(&pdev->dev, "Can't setup pin mux!\n");
goto out_error_pin_mux;
@@ -742,7 +710,7 @@ out_error_add_adapter:
free_irq(iface->irq, iface);
out_error_req_irq:
out_error_no_irq:
- peripheral_free_list(pin_req[pdev->id]);
+ peripheral_free_list((unsigned short *)pdev->dev.platform_data);
out_error_pin_mux:
iounmap(iface->regs_base);
out_error_ioremap:
@@ -760,7 +728,7 @@ static int i2c_bfin_twi_remove(struct platform_device *pdev)
i2c_del_adapter(&(iface->adap));
free_irq(iface->irq, iface);
- peripheral_free_list(pin_req[pdev->id]);
+ peripheral_free_list((unsigned short *)pdev->dev.platform_data);
iounmap(iface->regs_base);
kfree(iface);
@@ -770,11 +738,10 @@ static int i2c_bfin_twi_remove(struct platform_device *pdev)
static struct platform_driver i2c_bfin_twi_driver = {
.probe = i2c_bfin_twi_probe,
.remove = i2c_bfin_twi_remove,
- .suspend = i2c_bfin_twi_suspend,
- .resume = i2c_bfin_twi_resume,
.driver = {
.name = "i2c-bfin-twi",
.owner = THIS_MODULE,
+ .pm = &i2c_bfin_twi_pm,
},
};
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 00e8f213f56e..92a1e2c15baa 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -374,17 +374,7 @@ static struct pci_driver dw_i2c_driver = {
},
};
-static int __init dw_i2c_init_driver(void)
-{
- return pci_register_driver(&dw_i2c_driver);
-}
-module_init(dw_i2c_init_driver);
-
-static void __exit dw_i2c_exit_driver(void)
-{
- pci_unregister_driver(&dw_i2c_driver);
-}
-module_exit(dw_i2c_exit_driver);
+module_pci_driver(dw_i2c_driver);
MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");
diff --git a/drivers/i2c/busses/i2c-diolan-u2c.c b/drivers/i2c/busses/i2c-diolan-u2c.c
index 7eb19a5222f2..dae3ddfe7619 100644
--- a/drivers/i2c/busses/i2c-diolan-u2c.c
+++ b/drivers/i2c/busses/i2c-diolan-u2c.c
@@ -405,6 +405,7 @@ static int diolan_usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
}
}
}
+ ret = num;
abort:
sret = diolan_i2c_stop(dev);
if (sret < 0 && ret >= 0)
@@ -517,6 +518,6 @@ static struct usb_driver diolan_u2c_driver = {
module_usb_driver(diolan_u2c_driver);
-MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
+MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION(DRIVER_NAME " driver");
MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 2f74ae872e1e..259f7697bf25 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -953,17 +953,7 @@ static struct pci_driver pch_pcidriver = {
.resume = pch_i2c_resume
};
-static int __init pch_pci_init(void)
-{
- return pci_register_driver(&pch_pcidriver);
-}
-module_init(pch_pci_init);
-
-static void __exit pch_pci_exit(void)
-{
- pci_unregister_driver(&pch_pcidriver);
-}
-module_exit(pch_pci_exit);
+module_pci_driver(pch_pcidriver);
MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semico ML7213/ML7223/ML7831 IOH I2C");
MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/busses/i2c-hydra.c b/drivers/i2c/busses/i2c-hydra.c
index c527de17db4f..c9f95e1666a8 100644
--- a/drivers/i2c/busses/i2c-hydra.c
+++ b/drivers/i2c/busses/i2c-hydra.c
@@ -156,23 +156,8 @@ static struct pci_driver hydra_driver = {
.remove = __devexit_p(hydra_remove),
};
-static int __init i2c_hydra_init(void)
-{
- return pci_register_driver(&hydra_driver);
-}
-
-
-static void __exit i2c_hydra_exit(void)
-{
- pci_unregister_driver(&hydra_driver);
-}
-
-
+module_pci_driver(hydra_driver);
MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
MODULE_DESCRIPTION("i2c for Apple Hydra Mac I/O");
MODULE_LICENSE("GPL");
-
-module_init(i2c_hydra_init);
-module_exit(i2c_hydra_exit);
-
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index ae2945a5e007..898dcf9c7ade 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -60,10 +60,12 @@
Block process call transaction no
I2C block read transaction yes (doesn't use the block buffer)
Slave mode no
+ Interrupt processing yes
See the file Documentation/i2c/busses/i2c-i801 for details.
*/
+#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
@@ -76,6 +78,7 @@
#include <linux/io.h>
#include <linux/dmi.h>
#include <linux/slab.h>
+#include <linux/wait.h>
/* I801 SMBus address offsets */
#define SMBHSTSTS(p) (0 + (p)->smba)
@@ -91,8 +94,12 @@
/* PCI Address Constants */
#define SMBBAR 4
+#define SMBPCISTS 0x006
#define SMBHSTCFG 0x040
+/* Host status bits for SMBPCISTS */
+#define SMBPCISTS_INTS 0x08
+
/* Host configuration bits for SMBHSTCFG */
#define SMBHSTCFG_HST_EN 1
#define SMBHSTCFG_SMB_SMI_EN 2
@@ -102,12 +109,8 @@
#define SMBAUXCTL_CRC 1
#define SMBAUXCTL_E32B 2
-/* kill bit for SMBHSTCNT */
-#define SMBHSTCNT_KILL 2
-
/* Other settings */
#define MAX_RETRIES 400
-#define ENABLE_INT9 0 /* set to 0x01 to enable - untested */
/* I801 command constants */
#define I801_QUICK 0x00
@@ -117,10 +120,13 @@
#define I801_PROC_CALL 0x10 /* unimplemented */
#define I801_BLOCK_DATA 0x14
#define I801_I2C_BLOCK_DATA 0x18 /* ICH5 and later */
-#define I801_BLOCK_LAST 0x34
-#define I801_I2C_BLOCK_LAST 0x38 /* ICH5 and later */
-#define I801_START 0x40
-#define I801_PEC_EN 0x80 /* ICH3 and later */
+
+/* I801 Host Control register bits */
+#define SMBHSTCNT_INTREN 0x01
+#define SMBHSTCNT_KILL 0x02
+#define SMBHSTCNT_LAST_BYTE 0x20
+#define SMBHSTCNT_START 0x40
+#define SMBHSTCNT_PEC_EN 0x80 /* ICH3 and later */
/* I801 Hosts Status register bits */
#define SMBHSTSTS_BYTE_DONE 0x80
@@ -132,9 +138,11 @@
#define SMBHSTSTS_INTR 0x02
#define SMBHSTSTS_HOST_BUSY 0x01
-#define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_FAILED | \
- SMBHSTSTS_BUS_ERR | SMBHSTSTS_DEV_ERR | \
- SMBHSTSTS_INTR)
+#define STATUS_ERROR_FLAGS (SMBHSTSTS_FAILED | SMBHSTSTS_BUS_ERR | \
+ SMBHSTSTS_DEV_ERR)
+
+#define STATUS_FLAGS (SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR | \
+ STATUS_ERROR_FLAGS)
/* Older devices have their ID defined in <linux/pci_ids.h> */
#define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS 0x1c22
@@ -154,6 +162,17 @@ struct i801_priv {
unsigned char original_hstcfg;
struct pci_dev *pci_dev;
unsigned int features;
+
+ /* isr processing */
+ wait_queue_head_t waitq;
+ u8 status;
+
+ /* Command state used by isr for byte-by-byte block transactions */
+ u8 cmd;
+ bool is_read;
+ int count;
+ int len;
+ u8 *data;
};
static struct pci_driver i801_driver;
@@ -162,6 +181,7 @@ static struct pci_driver i801_driver;
#define FEATURE_BLOCK_BUFFER (1 << 1)
#define FEATURE_BLOCK_PROC (1 << 2)
#define FEATURE_I2C_BLOCK_READ (1 << 3)
+#define FEATURE_IRQ (1 << 4)
/* Not really a feature, but it's convenient to handle it as such */
#define FEATURE_IDF (1 << 15)
@@ -170,6 +190,7 @@ static const char *i801_feature_names[] = {
"Block buffer",
"Block process call",
"I2C block read",
+ "Interrupt",
};
static unsigned int disable_features;
@@ -205,13 +226,22 @@ static int i801_check_pre(struct i801_priv *priv)
return 0;
}
-/* Convert the status register to an error code, and clear it. */
-static int i801_check_post(struct i801_priv *priv, int status, int timeout)
+/*
+ * Convert the status register to an error code, and clear it.
+ * Note that status only contains the bits we want to clear, not the
+ * actual register value.
+ */
+static int i801_check_post(struct i801_priv *priv, int status)
{
int result = 0;
- /* If the SMBus is still busy, we give up */
- if (timeout) {
+ /*
+ * If the SMBus is still busy, we give up
+ * Note: This timeout condition only happens when using polling
+ * transactions. For interrupt operation, NAK/timeout is indicated by
+ * DEV_ERR.
+ */
+ if (unlikely(status < 0)) {
dev_err(&priv->pci_dev->dev, "Transaction timeout\n");
/* try to stop the current command */
dev_dbg(&priv->pci_dev->dev, "Terminating the current operation\n");
@@ -244,64 +274,76 @@ static int i801_check_post(struct i801_priv *priv, int status, int timeout)
dev_dbg(&priv->pci_dev->dev, "Lost arbitration\n");
}
- if (result) {
- /* Clear error flags */
- outb_p(status & STATUS_FLAGS, SMBHSTSTS(priv));
- status = inb_p(SMBHSTSTS(priv)) & STATUS_FLAGS;
- if (status) {
- dev_warn(&priv->pci_dev->dev, "Failed clearing status "
- "flags at end of transaction (%02x)\n",
- status);
- }
- }
+ /* Clear status flags except BYTE_DONE, to be cleared by caller */
+ outb_p(status, SMBHSTSTS(priv));
return result;
}
-static int i801_transaction(struct i801_priv *priv, int xact)
+/* Wait for BUSY being cleared and either INTR or an error flag being set */
+static int i801_wait_intr(struct i801_priv *priv)
{
- int status;
- int result;
int timeout = 0;
-
- result = i801_check_pre(priv);
- if (result < 0)
- return result;
-
- /* the current contents of SMBHSTCNT can be overwritten, since PEC,
- * INTREN, SMBSCMD are passed in xact */
- outb_p(xact | I801_START, SMBHSTCNT(priv));
+ int status;
/* We will always wait for a fraction of a second! */
do {
usleep_range(250, 500);
status = inb_p(SMBHSTSTS(priv));
- } while ((status & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_RETRIES));
+ } while (((status & SMBHSTSTS_HOST_BUSY) ||
+ !(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR))) &&
+ (timeout++ < MAX_RETRIES));
- result = i801_check_post(priv, status, timeout > MAX_RETRIES);
- if (result < 0)
- return result;
-
- outb_p(SMBHSTSTS_INTR, SMBHSTSTS(priv));
- return 0;
+ if (timeout > MAX_RETRIES) {
+ dev_dbg(&priv->pci_dev->dev, "INTR Timeout!\n");
+ return -ETIMEDOUT;
+ }
+ return status & (STATUS_ERROR_FLAGS | SMBHSTSTS_INTR);
}
-/* wait for INTR bit as advised by Intel */
-static void i801_wait_hwpec(struct i801_priv *priv)
+/* Wait for either BYTE_DONE or an error flag being set */
+static int i801_wait_byte_done(struct i801_priv *priv)
{
int timeout = 0;
int status;
+ /* We will always wait for a fraction of a second! */
do {
usleep_range(250, 500);
status = inb_p(SMBHSTSTS(priv));
- } while ((!(status & SMBHSTSTS_INTR))
- && (timeout++ < MAX_RETRIES));
+ } while (!(status & (STATUS_ERROR_FLAGS | SMBHSTSTS_BYTE_DONE)) &&
+ (timeout++ < MAX_RETRIES));
- if (timeout > MAX_RETRIES)
- dev_dbg(&priv->pci_dev->dev, "PEC Timeout!\n");
+ if (timeout > MAX_RETRIES) {
+ dev_dbg(&priv->pci_dev->dev, "BYTE_DONE Timeout!\n");
+ return -ETIMEDOUT;
+ }
+ return status & STATUS_ERROR_FLAGS;
+}
- outb_p(status, SMBHSTSTS(priv));
+static int i801_transaction(struct i801_priv *priv, int xact)
+{
+ int status;
+ int result;
+
+ result = i801_check_pre(priv);
+ if (result < 0)
+ return result;
+
+ if (priv->features & FEATURE_IRQ) {
+ outb_p(xact | SMBHSTCNT_INTREN | SMBHSTCNT_START,
+ SMBHSTCNT(priv));
+ wait_event(priv->waitq, (status = priv->status));
+ priv->status = 0;
+ return i801_check_post(priv, status);
+ }
+
+ /* the current contents of SMBHSTCNT can be overwritten, since PEC,
+ * SMBSCMD are passed in xact */
+ outb_p(xact | SMBHSTCNT_START, SMBHSTCNT(priv));
+
+ status = i801_wait_intr(priv);
+ return i801_check_post(priv, status);
}
static int i801_block_transaction_by_block(struct i801_priv *priv,
@@ -321,8 +363,8 @@ static int i801_block_transaction_by_block(struct i801_priv *priv,
outb_p(data->block[i+1], SMBBLKDAT(priv));
}
- status = i801_transaction(priv, I801_BLOCK_DATA | ENABLE_INT9 |
- I801_PEC_EN * hwpec);
+ status = i801_transaction(priv, I801_BLOCK_DATA |
+ (hwpec ? SMBHSTCNT_PEC_EN : 0));
if (status)
return status;
@@ -338,6 +380,98 @@ static int i801_block_transaction_by_block(struct i801_priv *priv,
return 0;
}
+static void i801_isr_byte_done(struct i801_priv *priv)
+{
+ if (priv->is_read) {
+ /* For SMBus block reads, length is received with first byte */
+ if (((priv->cmd & 0x1c) == I801_BLOCK_DATA) &&
+ (priv->count == 0)) {
+ priv->len = inb_p(SMBHSTDAT0(priv));
+ if (priv->len < 1 || priv->len > I2C_SMBUS_BLOCK_MAX) {
+ dev_err(&priv->pci_dev->dev,
+ "Illegal SMBus block read size %d\n",
+ priv->len);
+ /* FIXME: Recover */
+ priv->len = I2C_SMBUS_BLOCK_MAX;
+ } else {
+ dev_dbg(&priv->pci_dev->dev,
+ "SMBus block read size is %d\n",
+ priv->len);
+ }
+ priv->data[-1] = priv->len;
+ }
+
+ /* Read next byte */
+ if (priv->count < priv->len)
+ priv->data[priv->count++] = inb(SMBBLKDAT(priv));
+ else
+ dev_dbg(&priv->pci_dev->dev,
+ "Discarding extra byte on block read\n");
+
+ /* Set LAST_BYTE for last byte of read transaction */
+ if (priv->count == priv->len - 1)
+ outb_p(priv->cmd | SMBHSTCNT_LAST_BYTE,
+ SMBHSTCNT(priv));
+ } else if (priv->count < priv->len - 1) {
+ /* Write next byte, except for IRQ after last byte */
+ outb_p(priv->data[++priv->count], SMBBLKDAT(priv));
+ }
+
+ /* Clear BYTE_DONE to continue with next byte */
+ outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv));
+}
+
+/*
+ * There are two kinds of interrupts:
+ *
+ * 1) i801 signals transaction completion with one of these interrupts:
+ * INTR - Success
+ * DEV_ERR - Invalid command, NAK or communication timeout
+ * BUS_ERR - SMI# transaction collision
+ * FAILED - transaction was canceled due to a KILL request
+ * When any of these occur, update ->status and wake up the waitq.
+ * ->status must be cleared before kicking off the next transaction.
+ *
+ * 2) For byte-by-byte (I2C read/write) transactions, one BYTE_DONE interrupt
+ * occurs for each byte of a byte-by-byte to prepare the next byte.
+ */
+static irqreturn_t i801_isr(int irq, void *dev_id)
+{
+ struct i801_priv *priv = dev_id;
+ u16 pcists;
+ u8 status;
+
+ /* Confirm this is our interrupt */
+ pci_read_config_word(priv->pci_dev, SMBPCISTS, &pcists);
+ if (!(pcists & SMBPCISTS_INTS))
+ return IRQ_NONE;
+
+ status = inb_p(SMBHSTSTS(priv));
+ if (status != 0x42)
+ dev_dbg(&priv->pci_dev->dev, "irq: status = %02x\n", status);
+
+ if (status & SMBHSTSTS_BYTE_DONE)
+ i801_isr_byte_done(priv);
+
+ /*
+ * Clear irq sources and report transaction result.
+ * ->status must be cleared before the next transaction is started.
+ */
+ status &= SMBHSTSTS_INTR | STATUS_ERROR_FLAGS;
+ if (status) {
+ outb_p(status, SMBHSTSTS(priv));
+ priv->status |= status;
+ wake_up(&priv->waitq);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * For "byte-by-byte" block transactions:
+ * I2C write uses cmd=I801_BLOCK_DATA, I2C_EN=1
+ * I2C read uses cmd=I801_I2C_BLOCK_DATA
+ */
static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
union i2c_smbus_data *data,
char read_write, int command,
@@ -347,7 +481,6 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
int smbcmd;
int status;
int result;
- int timeout;
result = i801_check_pre(priv);
if (result < 0)
@@ -360,36 +493,39 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
outb_p(data->block[1], SMBBLKDAT(priv));
}
+ if (command == I2C_SMBUS_I2C_BLOCK_DATA &&
+ read_write == I2C_SMBUS_READ)
+ smbcmd = I801_I2C_BLOCK_DATA;
+ else
+ smbcmd = I801_BLOCK_DATA;
+
+ if (priv->features & FEATURE_IRQ) {
+ priv->is_read = (read_write == I2C_SMBUS_READ);
+ if (len == 1 && priv->is_read)
+ smbcmd |= SMBHSTCNT_LAST_BYTE;
+ priv->cmd = smbcmd | SMBHSTCNT_INTREN;
+ priv->len = len;
+ priv->count = 0;
+ priv->data = &data->block[1];
+
+ outb_p(priv->cmd | SMBHSTCNT_START, SMBHSTCNT(priv));
+ wait_event(priv->waitq, (status = priv->status));
+ priv->status = 0;
+ return i801_check_post(priv, status);
+ }
+
for (i = 1; i <= len; i++) {
- if (i == len && read_write == I2C_SMBUS_READ) {
- if (command == I2C_SMBUS_I2C_BLOCK_DATA)
- smbcmd = I801_I2C_BLOCK_LAST;
- else
- smbcmd = I801_BLOCK_LAST;
- } else {
- if (command == I2C_SMBUS_I2C_BLOCK_DATA
- && read_write == I2C_SMBUS_READ)
- smbcmd = I801_I2C_BLOCK_DATA;
- else
- smbcmd = I801_BLOCK_DATA;
- }
- outb_p(smbcmd | ENABLE_INT9, SMBHSTCNT(priv));
+ if (i == len && read_write == I2C_SMBUS_READ)
+ smbcmd |= SMBHSTCNT_LAST_BYTE;
+ outb_p(smbcmd, SMBHSTCNT(priv));
if (i == 1)
- outb_p(inb(SMBHSTCNT(priv)) | I801_START,
+ outb_p(inb(SMBHSTCNT(priv)) | SMBHSTCNT_START,
SMBHSTCNT(priv));
- /* We will always wait for a fraction of a second! */
- timeout = 0;
- do {
- usleep_range(250, 500);
- status = inb_p(SMBHSTSTS(priv));
- } while ((!(status & SMBHSTSTS_BYTE_DONE))
- && (timeout++ < MAX_RETRIES));
-
- result = i801_check_post(priv, status, timeout > MAX_RETRIES);
- if (result < 0)
- return result;
+ status = i801_wait_byte_done(priv);
+ if (status)
+ goto exit;
if (i == 1 && read_write == I2C_SMBUS_READ
&& command != I2C_SMBUS_I2C_BLOCK_DATA) {
@@ -416,10 +552,12 @@ static int i801_block_transaction_byte_by_byte(struct i801_priv *priv,
outb_p(data->block[i+1], SMBBLKDAT(priv));
/* signals SMBBLKDAT ready */
- outb_p(SMBHSTSTS_BYTE_DONE | SMBHSTSTS_INTR, SMBHSTSTS(priv));
+ outb_p(SMBHSTSTS_BYTE_DONE, SMBHSTSTS(priv));
}
- return 0;
+ status = i801_wait_intr(priv);
+exit:
+ return i801_check_post(priv, status);
}
static int i801_set_block_buffer_mode(struct i801_priv *priv)
@@ -474,9 +612,6 @@ static int i801_block_transaction(struct i801_priv *priv,
read_write,
command, hwpec);
- if (result == 0 && hwpec)
- i801_wait_hwpec(priv);
-
if (command == I2C_SMBUS_I2C_BLOCK_DATA
&& read_write == I2C_SMBUS_WRITE) {
/* restore saved configuration register value */
@@ -564,7 +699,7 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr,
ret = i801_block_transaction(priv, data, read_write, size,
hwpec);
else
- ret = i801_transaction(priv, xact | ENABLE_INT9);
+ ret = i801_transaction(priv, xact);
/* Some BIOSes don't like it when PEC is enabled at reboot or resume
time, so we forcibly disable it after every transaction. Turn off
@@ -799,6 +934,16 @@ static int __devinit i801_probe(struct pci_dev *dev,
break;
}
+ /* IRQ processing tested on CougarPoint PCH, ICH5, ICH7-M and ICH10 */
+ if (dev->device == PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS ||
+ dev->device == PCI_DEVICE_ID_INTEL_82801EB_3 ||
+ dev->device == PCI_DEVICE_ID_INTEL_ICH7_17 ||
+ dev->device == PCI_DEVICE_ID_INTEL_ICH8_5 ||
+ dev->device == PCI_DEVICE_ID_INTEL_ICH9_6 ||
+ dev->device == PCI_DEVICE_ID_INTEL_ICH10_4 ||
+ dev->device == PCI_DEVICE_ID_INTEL_ICH10_5)
+ priv->features |= FEATURE_IRQ;
+
/* Disable features on user request */
for (i = 0; i < ARRAY_SIZE(i801_feature_names); i++) {
if (priv->features & disable_features & (1 << i))
@@ -846,16 +991,30 @@ static int __devinit i801_probe(struct pci_dev *dev,
}
pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp);
- if (temp & SMBHSTCFG_SMB_SMI_EN)
+ if (temp & SMBHSTCFG_SMB_SMI_EN) {
dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
- else
- dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n");
+ /* Disable SMBus interrupt feature if SMBus using SMI# */
+ priv->features &= ~FEATURE_IRQ;
+ }
/* Clear special mode bits */
if (priv->features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER))
outb_p(inb_p(SMBAUXCTL(priv)) &
~(SMBAUXCTL_CRC | SMBAUXCTL_E32B), SMBAUXCTL(priv));
+ if (priv->features & FEATURE_IRQ) {
+ init_waitqueue_head(&priv->waitq);
+
+ err = request_irq(dev->irq, i801_isr, IRQF_SHARED,
+ i801_driver.name, priv);
+ if (err) {
+ dev_err(&dev->dev, "Failed to allocate irq %d: %d\n",
+ dev->irq, err);
+ goto exit_release;
+ }
+ dev_info(&dev->dev, "SMBus using PCI Interrupt\n");
+ }
+
/* set up the sysfs linkage to our parent device */
priv->adapter.dev.parent = &dev->dev;
@@ -867,14 +1026,18 @@ static int __devinit i801_probe(struct pci_dev *dev,
err = i2c_add_adapter(&priv->adapter);
if (err) {
dev_err(&dev->dev, "Failed to add SMBus adapter\n");
- goto exit_release;
+ goto exit_free_irq;
}
i801_probe_optional_slaves(priv);
pci_set_drvdata(dev, priv);
+
return 0;
+exit_free_irq:
+ if (priv->features & FEATURE_IRQ)
+ free_irq(dev->irq, priv);
exit_release:
pci_release_region(dev, SMBBAR);
exit:
@@ -888,7 +1051,11 @@ static void __devexit i801_remove(struct pci_dev *dev)
i2c_del_adapter(&priv->adapter);
pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg);
+
+ if (priv->features & FEATURE_IRQ)
+ free_irq(dev->irq, priv);
pci_release_region(dev, SMBBAR);
+
pci_set_drvdata(dev, NULL);
kfree(priv);
/*
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 8d6b504d65c4..0722f869465c 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -53,7 +53,6 @@
#include <linux/of_i2c.h>
#include <linux/pinctrl/consumer.h>
-#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/i2c.h>
@@ -118,10 +117,8 @@ static u16 __initdata i2c_clk_div[50][2] = {
struct imx_i2c_struct {
struct i2c_adapter adapter;
- struct resource *res;
struct clk *clk;
void __iomem *base;
- int irq;
wait_queue_head_t queue;
unsigned long i2csr;
unsigned int disable_delay;
@@ -473,9 +470,8 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
struct imxi2c_platform_data *pdata = pdev->dev.platform_data;
struct pinctrl *pinctrl;
void __iomem *base;
- resource_size_t res_size;
- int irq, bitrate;
- int ret;
+ int irq, ret;
+ u32 bitrate;
dev_dbg(&pdev->dev, "<%s>\n", __func__);
@@ -490,25 +486,15 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
return -ENOENT;
}
- res_size = resource_size(res);
-
- if (!request_mem_region(res->start, res_size, DRIVER_NAME)) {
- dev_err(&pdev->dev, "request_mem_region failed\n");
+ base = devm_request_and_ioremap(&pdev->dev, res);
+ if (!base)
return -EBUSY;
- }
-
- base = ioremap(res->start, res_size);
- if (!base) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -EIO;
- goto fail1;
- }
- i2c_imx = kzalloc(sizeof(struct imx_i2c_struct), GFP_KERNEL);
+ i2c_imx = devm_kzalloc(&pdev->dev, sizeof(struct imx_i2c_struct),
+ GFP_KERNEL);
if (!i2c_imx) {
dev_err(&pdev->dev, "can't allocate interface\n");
- ret = -ENOMEM;
- goto fail2;
+ return -ENOMEM;
}
/* Setup i2c_imx driver structure */
@@ -518,29 +504,27 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
i2c_imx->adapter.dev.parent = &pdev->dev;
i2c_imx->adapter.nr = pdev->id;
i2c_imx->adapter.dev.of_node = pdev->dev.of_node;
- i2c_imx->irq = irq;
i2c_imx->base = base;
- i2c_imx->res = res;
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
if (IS_ERR(pinctrl)) {
- ret = PTR_ERR(pinctrl);
- goto fail3;
+ dev_err(&pdev->dev, "can't get/select pinctrl\n");
+ return PTR_ERR(pinctrl);
}
/* Get I2C clock */
- i2c_imx->clk = clk_get(&pdev->dev, "i2c_clk");
+ i2c_imx->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(i2c_imx->clk)) {
- ret = PTR_ERR(i2c_imx->clk);
dev_err(&pdev->dev, "can't get I2C clock\n");
- goto fail3;
+ return PTR_ERR(i2c_imx->clk);
}
/* Request IRQ */
- ret = request_irq(i2c_imx->irq, i2c_imx_isr, 0, pdev->name, i2c_imx);
+ ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0,
+ pdev->name, i2c_imx);
if (ret) {
- dev_err(&pdev->dev, "can't claim irq %d\n", i2c_imx->irq);
- goto fail4;
+ dev_err(&pdev->dev, "can't claim irq %d\n", irq);
+ return ret;
}
/* Init queue */
@@ -565,7 +549,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
ret = i2c_add_numbered_adapter(&i2c_imx->adapter);
if (ret < 0) {
dev_err(&pdev->dev, "registration failed\n");
- goto fail5;
+ return ret;
}
of_i2c_register_devices(&i2c_imx->adapter);
@@ -573,28 +557,16 @@ static int __init i2c_imx_probe(struct platform_device *pdev)
/* Set up platform driver data */
platform_set_drvdata(pdev, i2c_imx);
- dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", i2c_imx->irq);
+ dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq);
dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n",
- i2c_imx->res->start, i2c_imx->res->end);
- dev_dbg(&i2c_imx->adapter.dev, "allocated %d bytes at 0x%x \n",
- res_size, i2c_imx->res->start);
+ res->start, res->end);
+ dev_dbg(&i2c_imx->adapter.dev, "allocated %d bytes at 0x%x\n",
+ resource_size(res), res->start);
dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n",
i2c_imx->adapter.name);
dev_dbg(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n");
return 0; /* Return OK */
-
-fail5:
- free_irq(i2c_imx->irq, i2c_imx);
-fail4:
- clk_put(i2c_imx->clk);
-fail3:
- kfree(i2c_imx);
-fail2:
- iounmap(base);
-fail1:
- release_mem_region(res->start, resource_size(res));
- return ret; /* Return error number */
}
static int __exit i2c_imx_remove(struct platform_device *pdev)
@@ -606,20 +578,12 @@ static int __exit i2c_imx_remove(struct platform_device *pdev)
i2c_del_adapter(&i2c_imx->adapter);
platform_set_drvdata(pdev, NULL);
- /* free interrupt */
- free_irq(i2c_imx->irq, i2c_imx);
-
/* setup chip registers to defaults */
writeb(0, i2c_imx->base + IMX_I2C_IADR);
writeb(0, i2c_imx->base + IMX_I2C_IFDR);
writeb(0, i2c_imx->base + IMX_I2C_I2CR);
writeb(0, i2c_imx->base + IMX_I2C_I2SR);
- clk_put(i2c_imx->clk);
-
- iounmap(i2c_imx->base);
- release_mem_region(i2c_imx->res->start, resource_size(i2c_imx->res));
- kfree(i2c_imx);
return 0;
}
diff --git a/drivers/i2c/busses/i2c-intel-mid.c b/drivers/i2c/busses/i2c-intel-mid.c
index 365bad5b890b..7c28f10f95ca 100644
--- a/drivers/i2c/busses/i2c-intel-mid.c
+++ b/drivers/i2c/busses/i2c-intel-mid.c
@@ -1116,18 +1116,7 @@ static struct pci_driver intel_mid_i2c_driver = {
.remove = __devexit_p(intel_mid_i2c_remove),
};
-static int __init intel_mid_i2c_init(void)
-{
- return pci_register_driver(&intel_mid_i2c_driver);
-}
-
-static void __exit intel_mid_i2c_exit(void)
-{
- pci_unregister_driver(&intel_mid_i2c_driver);
-}
-
-module_init(intel_mid_i2c_init);
-module_exit(intel_mid_i2c_exit);
+module_pci_driver(intel_mid_i2c_driver);
MODULE_AUTHOR("Ba Zheng <zheng.ba@intel.com>");
MODULE_DESCRIPTION("I2C driver for Moorestown Platform");
diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c
index 4f44a33017b0..2e9d56719e99 100644
--- a/drivers/i2c/busses/i2c-mv64xxx.c
+++ b/drivers/i2c/busses/i2c-mv64xxx.c
@@ -18,6 +18,11 @@
#include <linux/mv643xx_i2c.h>
#include <linux/platform_device.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_i2c.h>
+#include <linux/clk.h>
+#include <linux/err.h>
/* Register defines */
#define MV64XXX_I2C_REG_SLAVE_ADDR 0x00
@@ -98,6 +103,9 @@ struct mv64xxx_i2c_data {
int rc;
u32 freq_m;
u32 freq_n;
+#if defined(CONFIG_HAVE_CLK)
+ struct clk *clk;
+#endif
wait_queue_head_t waitq;
spinlock_t lock;
struct i2c_msg *msg;
@@ -521,6 +529,82 @@ mv64xxx_i2c_unmap_regs(struct mv64xxx_i2c_data *drv_data)
drv_data->reg_base_p = 0;
}
+#ifdef CONFIG_OF
+static int __devinit
+mv64xxx_calc_freq(const int tclk, const int n, const int m)
+{
+ return tclk / (10 * (m + 1) * (2 << n));
+}
+
+static bool __devinit
+mv64xxx_find_baud_factors(const u32 req_freq, const u32 tclk, u32 *best_n,
+ u32 *best_m)
+{
+ int freq, delta, best_delta = INT_MAX;
+ int m, n;
+
+ for (n = 0; n <= 7; n++)
+ for (m = 0; m <= 15; m++) {
+ freq = mv64xxx_calc_freq(tclk, n, m);
+ delta = req_freq - freq;
+ if (delta >= 0 && delta < best_delta) {
+ *best_m = m;
+ *best_n = n;
+ best_delta = delta;
+ }
+ if (best_delta == 0)
+ return true;
+ }
+ if (best_delta == INT_MAX)
+ return false;
+ return true;
+}
+
+static int __devinit
+mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
+ struct device_node *np)
+{
+ u32 bus_freq, tclk;
+ int rc = 0;
+
+ /* CLK is mandatory when using DT to describe the i2c bus. We
+ * need to know tclk in order to calculate bus clock
+ * factors.
+ */
+#if !defined(CONFIG_HAVE_CLK)
+ /* Have OF but no CLK */
+ return -ENODEV;
+#else
+ if (IS_ERR(drv_data->clk)) {
+ rc = -ENODEV;
+ goto out;
+ }
+ tclk = clk_get_rate(drv_data->clk);
+ of_property_read_u32(np, "clock-frequency", &bus_freq);
+ if (!mv64xxx_find_baud_factors(bus_freq, tclk,
+ &drv_data->freq_n, &drv_data->freq_m)) {
+ rc = -EINVAL;
+ goto out;
+ }
+ drv_data->irq = irq_of_parse_and_map(np, 0);
+
+ /* Its not yet defined how timeouts will be specified in device tree.
+ * So hard code the value to 1 second.
+ */
+ drv_data->adapter.timeout = HZ;
+out:
+ return rc;
+#endif
+}
+#else /* CONFIG_OF */
+static int __devinit
+mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
+ struct device_node *np)
+{
+ return -ENODEV;
+}
+#endif /* CONFIG_OF */
+
static int __devinit
mv64xxx_i2c_probe(struct platform_device *pd)
{
@@ -528,7 +612,7 @@ mv64xxx_i2c_probe(struct platform_device *pd)
struct mv64xxx_i2c_pdata *pdata = pd->dev.platform_data;
int rc;
- if ((pd->id != 0) || !pdata)
+ if ((!pdata && !pd->dev.of_node))
return -ENODEV;
drv_data = kzalloc(sizeof(struct mv64xxx_i2c_data), GFP_KERNEL);
@@ -546,19 +630,35 @@ mv64xxx_i2c_probe(struct platform_device *pd)
init_waitqueue_head(&drv_data->waitq);
spin_lock_init(&drv_data->lock);
- drv_data->freq_m = pdata->freq_m;
- drv_data->freq_n = pdata->freq_n;
- drv_data->irq = platform_get_irq(pd, 0);
+#if defined(CONFIG_HAVE_CLK)
+ /* Not all platforms have a clk */
+ drv_data->clk = clk_get(&pd->dev, NULL);
+ if (!IS_ERR(drv_data->clk)) {
+ clk_prepare(drv_data->clk);
+ clk_enable(drv_data->clk);
+ }
+#endif
+ if (pdata) {
+ drv_data->freq_m = pdata->freq_m;
+ drv_data->freq_n = pdata->freq_n;
+ drv_data->irq = platform_get_irq(pd, 0);
+ drv_data->adapter.timeout = msecs_to_jiffies(pdata->timeout);
+ } else if (pd->dev.of_node) {
+ rc = mv64xxx_of_config(drv_data, pd->dev.of_node);
+ if (rc)
+ goto exit_unmap_regs;
+ }
if (drv_data->irq < 0) {
rc = -ENXIO;
goto exit_unmap_regs;
}
+
drv_data->adapter.dev.parent = &pd->dev;
drv_data->adapter.algo = &mv64xxx_i2c_algo;
drv_data->adapter.owner = THIS_MODULE;
drv_data->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
- drv_data->adapter.timeout = msecs_to_jiffies(pdata->timeout);
drv_data->adapter.nr = pd->id;
+ drv_data->adapter.dev.of_node = pd->dev.of_node;
platform_set_drvdata(pd, drv_data);
i2c_set_adapdata(&drv_data->adapter, drv_data);
@@ -577,11 +677,20 @@ mv64xxx_i2c_probe(struct platform_device *pd)
goto exit_free_irq;
}
+ of_i2c_register_devices(&drv_data->adapter);
+
return 0;
exit_free_irq:
free_irq(drv_data->irq, drv_data);
exit_unmap_regs:
+#if defined(CONFIG_HAVE_CLK)
+ /* Not all platforms have a clk */
+ if (!IS_ERR(drv_data->clk)) {
+ clk_disable(drv_data->clk);
+ clk_unprepare(drv_data->clk);
+ }
+#endif
mv64xxx_i2c_unmap_regs(drv_data);
exit_kfree:
kfree(drv_data);
@@ -597,17 +706,31 @@ mv64xxx_i2c_remove(struct platform_device *dev)
rc = i2c_del_adapter(&drv_data->adapter);
free_irq(drv_data->irq, drv_data);
mv64xxx_i2c_unmap_regs(drv_data);
+#if defined(CONFIG_HAVE_CLK)
+ /* Not all platforms have a clk */
+ if (!IS_ERR(drv_data->clk)) {
+ clk_disable(drv_data->clk);
+ clk_unprepare(drv_data->clk);
+ }
+#endif
kfree(drv_data);
return rc;
}
+static const struct of_device_id mv64xxx_i2c_of_match_table[] __devinitdata = {
+ { .compatible = "marvell,mv64xxx-i2c", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mv64xxx_i2c_of_match_table);
+
static struct platform_driver mv64xxx_i2c_driver = {
.probe = mv64xxx_i2c_probe,
.remove = __devexit_p(mv64xxx_i2c_remove),
.driver = {
.owner = THIS_MODULE,
.name = MV64XXX_I2C_CTLR_NAME,
+ .of_match_table = of_match_ptr(mv64xxx_i2c_of_match_table),
},
};
diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c
index 04eb441b6ce1..088c5c1ed17d 100644
--- a/drivers/i2c/busses/i2c-mxs.c
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -46,6 +46,10 @@
#define MXS_I2C_CTRL0_DIRECTION 0x00010000
#define MXS_I2C_CTRL0_XFER_COUNT(v) ((v) & 0x0000FFFF)
+#define MXS_I2C_TIMING0 (0x10)
+#define MXS_I2C_TIMING1 (0x20)
+#define MXS_I2C_TIMING2 (0x30)
+
#define MXS_I2C_CTRL1 (0x40)
#define MXS_I2C_CTRL1_SET (0x44)
#define MXS_I2C_CTRL1_CLR (0x48)
@@ -97,6 +101,35 @@
#define MXS_CMD_I2C_READ (MXS_I2C_CTRL0_SEND_NAK_ON_LAST | \
MXS_I2C_CTRL0_MASTER_MODE)
+struct mxs_i2c_speed_config {
+ uint32_t timing0;
+ uint32_t timing1;
+ uint32_t timing2;
+};
+
+/*
+ * Timing values for the default 24MHz clock supplied into the i2c block.
+ *
+ * The bus can operate at 95kHz or at 400kHz with the following timing
+ * register configurations. The 100kHz mode isn't present because it's
+ * values are not stated in the i.MX233/i.MX28 datasheet. The 95kHz mode
+ * shall be close enough replacement. Therefore when the bus is configured
+ * for 100kHz operation, 95kHz timing settings are actually loaded.
+ *
+ * For details, see i.MX233 [25.4.2 - 25.4.4] and i.MX28 [27.5.2 - 27.5.4].
+ */
+static const struct mxs_i2c_speed_config mxs_i2c_95kHz_config = {
+ .timing0 = 0x00780030,
+ .timing1 = 0x00800030,
+ .timing2 = 0x00300030,
+};
+
+static const struct mxs_i2c_speed_config mxs_i2c_400kHz_config = {
+ .timing0 = 0x000f0007,
+ .timing1 = 0x001f000f,
+ .timing2 = 0x00300030,
+};
+
/**
* struct mxs_i2c_dev - per device, private MXS-I2C data
*
@@ -112,11 +145,17 @@ struct mxs_i2c_dev {
struct completion cmd_complete;
u32 cmd_err;
struct i2c_adapter adapter;
+ const struct mxs_i2c_speed_config *speed;
};
static void mxs_i2c_reset(struct mxs_i2c_dev *i2c)
{
stmp_reset_block(i2c->regs);
+
+ writel(i2c->speed->timing0, i2c->regs + MXS_I2C_TIMING0);
+ writel(i2c->speed->timing1, i2c->regs + MXS_I2C_TIMING1);
+ writel(i2c->speed->timing2, i2c->regs + MXS_I2C_TIMING2);
+
writel(MXS_I2C_IRQ_MASK << 8, i2c->regs + MXS_I2C_CTRL1_SET);
writel(MXS_I2C_QUEUECTRL_PIO_QUEUE_MODE,
i2c->regs + MXS_I2C_QUEUECTRL_SET);
@@ -193,7 +232,7 @@ static int mxs_i2c_wait_for_data(struct mxs_i2c_dev *i2c)
static int mxs_i2c_finish_read(struct mxs_i2c_dev *i2c, u8 *buf, int len)
{
- u32 data;
+ u32 uninitialized_var(data);
int i;
for (i = 0; i < len; i++) {
@@ -319,6 +358,28 @@ static const struct i2c_algorithm mxs_i2c_algo = {
.functionality = mxs_i2c_func,
};
+static int mxs_i2c_get_ofdata(struct mxs_i2c_dev *i2c)
+{
+ uint32_t speed;
+ struct device *dev = i2c->dev;
+ struct device_node *node = dev->of_node;
+ int ret;
+
+ if (!node)
+ return -EINVAL;
+
+ i2c->speed = &mxs_i2c_95kHz_config;
+ ret = of_property_read_u32(node, "clock-frequency", &speed);
+ if (ret)
+ dev_warn(dev, "No I2C speed selected, using 100kHz\n");
+ else if (speed == 400000)
+ i2c->speed = &mxs_i2c_400kHz_config;
+ else if (speed != 100000)
+ dev_warn(dev, "Unsupported I2C speed selected, using 100kHz\n");
+
+ return 0;
+}
+
static int __devinit mxs_i2c_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -358,6 +419,11 @@ static int __devinit mxs_i2c_probe(struct platform_device *pdev)
return err;
i2c->dev = dev;
+
+ err = mxs_i2c_get_ofdata(i2c);
+ if (err)
+ return err;
+
platform_set_drvdata(pdev, i2c);
/* Do reset to enforce correct startup after pinmuxing */
diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c
index 43a96a123920..392303b4be07 100644
--- a/drivers/i2c/busses/i2c-nforce2.c
+++ b/drivers/i2c/busses/i2c-nforce2.c
@@ -453,16 +453,4 @@ static struct pci_driver nforce2_driver = {
.remove = __devexit_p(nforce2_remove),
};
-static int __init nforce2_init(void)
-{
- return pci_register_driver(&nforce2_driver);
-}
-
-static void __exit nforce2_exit(void)
-{
- pci_unregister_driver(&nforce2_driver);
-}
-
-module_init(nforce2_init);
-module_exit(nforce2_exit);
-
+module_pci_driver(nforce2_driver);
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 5267ab93d550..61b00edacb08 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -14,7 +14,8 @@
*/
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/platform_device.h>
+#include <linux/amba/bus.h>
+#include <linux/atomic.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
@@ -23,8 +24,7 @@
#include <linux/io.h>
#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
-
-#include <plat/i2c.h>
+#include <linux/platform_data/i2c-nomadik.h>
#define DRIVER_NAME "nmk-i2c"
@@ -136,7 +136,7 @@ struct i2c_nmk_client {
/**
* struct nmk_i2c_dev - private data structure of the controller.
- * @pdev: parent platform device.
+ * @adev: parent amba device.
* @adap: corresponding I2C adapter.
* @irq: interrupt line for the controller.
* @virtbase: virtual io memory area.
@@ -150,7 +150,7 @@ struct i2c_nmk_client {
* @busy: Busy doing transfer.
*/
struct nmk_i2c_dev {
- struct platform_device *pdev;
+ struct amba_device *adev;
struct i2c_adapter adap;
int irq;
void __iomem *virtbase;
@@ -217,7 +217,7 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev)
}
}
- dev_err(&dev->pdev->dev,
+ dev_err(&dev->adev->dev,
"flushing operation timed out giving up after %d attempts",
LOOP_ATTEMPTS);
@@ -276,15 +276,32 @@ exit:
/**
* load_i2c_mcr_reg() - load the MCR register
* @dev: private data of controller
+ * @flags: message flags
*/
-static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *dev)
+static u32 load_i2c_mcr_reg(struct nmk_i2c_dev *dev, u16 flags)
{
u32 mcr = 0;
+ unsigned short slave_adr_3msb_bits;
- /* 7-bit address transaction */
- mcr |= GEN_MASK(1, I2C_MCR_AM, 12);
mcr |= GEN_MASK(dev->cli.slave_adr, I2C_MCR_A7, 1);
+ if (unlikely(flags & I2C_M_TEN)) {
+ /* 10-bit address transaction */
+ mcr |= GEN_MASK(2, I2C_MCR_AM, 12);
+ /*
+ * Get the top 3 bits.
+ * EA10 represents extended address in MCR. This includes
+ * the extension (MSB bits) of the 7 bit address loaded
+ * in A7
+ */
+ slave_adr_3msb_bits = (dev->cli.slave_adr >> 7) & 0x7;
+
+ mcr |= GEN_MASK(slave_adr_3msb_bits, I2C_MCR_EA10, 8);
+ } else {
+ /* 7-bit address transaction */
+ mcr |= GEN_MASK(1, I2C_MCR_AM, 12);
+ }
+
/* start byte procedure not applied */
mcr |= GEN_MASK(0, I2C_MCR_SB, 11);
@@ -333,10 +350,6 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
i2c_clk = clk_get_rate(dev->clk);
- /* fallback to std. mode if machine has not provided it */
- if (dev->cfg.clk_freq == 0)
- dev->cfg.clk_freq = 100000;
-
/*
* The spec says, in case of std. mode the divider is
* 2 whereas it is 3 for fast and fastplus mode of
@@ -364,7 +377,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
* and high speed (up to 3.4 Mb/s)
*/
if (dev->cfg.sm > I2C_FREQ_MODE_FAST) {
- dev_err(&dev->pdev->dev,
+ dev_err(&dev->adev->dev,
"do not support this mode defaulting to std. mode\n");
brcr2 = i2c_clk/(100000 * 2) & 0xffff;
writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR);
@@ -381,19 +394,20 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
/**
* read_i2c() - Read from I2C client device
* @dev: private data of I2C Driver
+ * @flags: message flags
*
* This function reads from i2c client device when controller is in
* master mode. There is a completion timeout. If there is no transfer
* before timeout error is returned.
*/
-static int read_i2c(struct nmk_i2c_dev *dev)
+static int read_i2c(struct nmk_i2c_dev *dev, u16 flags)
{
u32 status = 0;
u32 mcr;
u32 irq_mask = 0;
int timeout;
- mcr = load_i2c_mcr_reg(dev);
+ mcr = load_i2c_mcr_reg(dev, flags);
writel(mcr, dev->virtbase + I2C_MCR);
/* load the current CR value */
@@ -423,7 +437,7 @@ static int read_i2c(struct nmk_i2c_dev *dev)
&dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
- dev_err(&dev->pdev->dev,
+ dev_err(&dev->adev->dev,
"wait_for_completion_timeout "
"returned %d waiting for event\n", timeout);
status = timeout;
@@ -431,7 +445,7 @@ static int read_i2c(struct nmk_i2c_dev *dev)
if (timeout == 0) {
/* Controller timed out */
- dev_err(&dev->pdev->dev, "read from slave 0x%x timed out\n",
+ dev_err(&dev->adev->dev, "read from slave 0x%x timed out\n",
dev->cli.slave_adr);
status = -ETIMEDOUT;
}
@@ -459,17 +473,18 @@ static void fill_tx_fifo(struct nmk_i2c_dev *dev, int no_bytes)
/**
* write_i2c() - Write data to I2C client.
* @dev: private data of I2C Driver
+ * @flags: message flags
*
* This function writes data to I2C client
*/
-static int write_i2c(struct nmk_i2c_dev *dev)
+static int write_i2c(struct nmk_i2c_dev *dev, u16 flags)
{
u32 status = 0;
u32 mcr;
u32 irq_mask = 0;
int timeout;
- mcr = load_i2c_mcr_reg(dev);
+ mcr = load_i2c_mcr_reg(dev, flags);
writel(mcr, dev->virtbase + I2C_MCR);
@@ -510,7 +525,7 @@ static int write_i2c(struct nmk_i2c_dev *dev)
&dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
- dev_err(&dev->pdev->dev,
+ dev_err(&dev->adev->dev,
"wait_for_completion_timeout "
"returned %d waiting for event\n", timeout);
status = timeout;
@@ -518,7 +533,7 @@ static int write_i2c(struct nmk_i2c_dev *dev)
if (timeout == 0) {
/* Controller timed out */
- dev_err(&dev->pdev->dev, "write to slave 0x%x timed out\n",
+ dev_err(&dev->adev->dev, "write to slave 0x%x timed out\n",
dev->cli.slave_adr);
status = -ETIMEDOUT;
}
@@ -538,11 +553,11 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
if (flags & I2C_M_RD) {
/* read operation */
dev->cli.operation = I2C_READ;
- status = read_i2c(dev);
+ status = read_i2c(dev, flags);
} else {
/* write operation */
dev->cli.operation = I2C_WRITE;
- status = write_i2c(dev);
+ status = write_i2c(dev, flags);
}
if (status || (dev->result)) {
@@ -557,7 +572,7 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
if (((i2c_sr >> 2) & 0x3) == 0x3) {
/* get the abort cause */
cause = (i2c_sr >> 4) & 0x7;
- dev_err(&dev->pdev->dev, "%s\n",
+ dev_err(&dev->adev->dev, "%s\n",
cause >= ARRAY_SIZE(abort_causes) ?
"unknown reason" :
abort_causes[cause]);
@@ -630,7 +645,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
if (dev->regulator)
regulator_enable(dev->regulator);
- pm_runtime_get_sync(&dev->pdev->dev);
+ pm_runtime_get_sync(&dev->adev->dev);
clk_enable(dev->clk);
@@ -644,13 +659,6 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
setup_i2c_controller(dev);
for (i = 0; i < num_msgs; i++) {
- if (unlikely(msgs[i].flags & I2C_M_TEN)) {
- dev_err(&dev->pdev->dev,
- "10 bit addressing not supported\n");
-
- status = -EINVAL;
- goto out;
- }
dev->cli.slave_adr = msgs[i].addr;
dev->cli.buffer = msgs[i].buf;
dev->cli.count = msgs[i].len;
@@ -667,7 +675,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
out:
clk_disable(dev->clk);
- pm_runtime_put_sync(&dev->pdev->dev);
+ pm_runtime_put_sync(&dev->adev->dev);
if (dev->regulator)
regulator_disable(dev->regulator);
@@ -790,7 +798,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
if (dev->cli.count) {
dev->result = -EIO;
- dev_err(&dev->pdev->dev,
+ dev_err(&dev->adev->dev,
"%lu bytes still remain to be xfered\n",
dev->cli.count);
(void) init_hw(dev);
@@ -834,7 +842,7 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
dev->result = -EIO;
(void) init_hw(dev);
- dev_err(&dev->pdev->dev, "Tx Fifo Over run\n");
+ dev_err(&dev->adev->dev, "Tx Fifo Over run\n");
complete(&dev->xfer_complete);
break;
@@ -847,10 +855,10 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
case I2C_IT_RFSE:
case I2C_IT_WTSR:
case I2C_IT_STD:
- dev_err(&dev->pdev->dev, "unhandled Interrupt\n");
+ dev_err(&dev->adev->dev, "unhandled Interrupt\n");
break;
default:
- dev_err(&dev->pdev->dev, "spurious Interrupt..\n");
+ dev_err(&dev->adev->dev, "spurious Interrupt..\n");
break;
}
@@ -861,8 +869,8 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
#ifdef CONFIG_PM
static int nmk_i2c_suspend(struct device *dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct nmk_i2c_dev *nmk_i2c = platform_get_drvdata(pdev);
+ struct amba_device *adev = to_amba_device(dev);
+ struct nmk_i2c_dev *nmk_i2c = amba_get_drvdata(adev);
if (nmk_i2c->busy)
return -EBUSY;
@@ -891,7 +899,7 @@ static const struct dev_pm_ops nmk_i2c_pm = {
static unsigned int nmk_i2c_functionality(struct i2c_adapter *adap)
{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR;
}
static const struct i2c_algorithm nmk_i2c_algo = {
@@ -899,79 +907,81 @@ static const struct i2c_algorithm nmk_i2c_algo = {
.functionality = nmk_i2c_functionality
};
-static int __devinit nmk_i2c_probe(struct platform_device *pdev)
+static struct nmk_i2c_controller u8500_i2c = {
+ /*
+ * Slave data setup time; 250ns, 100ns, and 10ns, which
+ * is 14, 6 and 2 respectively for a 48Mhz i2c clock.
+ */
+ .slsu = 0xe,
+ .tft = 1, /* Tx FIFO threshold */
+ .rft = 8, /* Rx FIFO threshold */
+ .clk_freq = 400000, /* fast mode operation */
+ .timeout = 200, /* Slave response timeout(ms) */
+ .sm = I2C_FREQ_MODE_FAST,
+};
+
+static atomic_t adapter_id = ATOMIC_INIT(0);
+
+static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
{
int ret = 0;
- struct resource *res;
- struct nmk_i2c_controller *pdata =
- pdev->dev.platform_data;
+ struct nmk_i2c_controller *pdata = adev->dev.platform_data;
struct nmk_i2c_dev *dev;
struct i2c_adapter *adap;
+ if (!pdata)
+ /* No i2c configuration found, using the default. */
+ pdata = &u8500_i2c;
+
dev = kzalloc(sizeof(struct nmk_i2c_dev), GFP_KERNEL);
if (!dev) {
- dev_err(&pdev->dev, "cannot allocate memory\n");
+ dev_err(&adev->dev, "cannot allocate memory\n");
ret = -ENOMEM;
goto err_no_mem;
}
dev->busy = false;
- dev->pdev = pdev;
- platform_set_drvdata(pdev, dev);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENOENT;
- goto err_no_resource;
- }
-
- if (request_mem_region(res->start, resource_size(res),
- DRIVER_NAME "I/O region") == NULL) {
- ret = -EBUSY;
- goto err_no_region;
- }
+ dev->adev = adev;
+ amba_set_drvdata(adev, dev);
- dev->virtbase = ioremap(res->start, resource_size(res));
+ dev->virtbase = ioremap(adev->res.start, resource_size(&adev->res));
if (!dev->virtbase) {
ret = -ENOMEM;
goto err_no_ioremap;
}
- dev->irq = platform_get_irq(pdev, 0);
+ dev->irq = adev->irq[0];
ret = request_irq(dev->irq, i2c_irq_handler, 0,
DRIVER_NAME, dev);
if (ret) {
- dev_err(&pdev->dev, "cannot claim the irq %d\n", dev->irq);
+ dev_err(&adev->dev, "cannot claim the irq %d\n", dev->irq);
goto err_irq;
}
- dev->regulator = regulator_get(&pdev->dev, "v-i2c");
+ dev->regulator = regulator_get(&adev->dev, "v-i2c");
if (IS_ERR(dev->regulator)) {
- dev_warn(&pdev->dev, "could not get i2c regulator\n");
+ dev_warn(&adev->dev, "could not get i2c regulator\n");
dev->regulator = NULL;
}
- pm_suspend_ignore_children(&pdev->dev, true);
- pm_runtime_enable(&pdev->dev);
+ pm_suspend_ignore_children(&adev->dev, true);
- dev->clk = clk_get(&pdev->dev, NULL);
+ dev->clk = clk_get(&adev->dev, NULL);
if (IS_ERR(dev->clk)) {
- dev_err(&pdev->dev, "could not get i2c clock\n");
+ dev_err(&adev->dev, "could not get i2c clock\n");
ret = PTR_ERR(dev->clk);
goto err_no_clk;
}
adap = &dev->adap;
- adap->dev.parent = &pdev->dev;
+ adap->dev.parent = &adev->dev;
adap->owner = THIS_MODULE;
adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
adap->algo = &nmk_i2c_algo;
- adap->timeout = pdata->timeout ? msecs_to_jiffies(pdata->timeout) :
- msecs_to_jiffies(20000);
+ adap->timeout = msecs_to_jiffies(pdata->timeout);
+ adap->nr = atomic_read(&adapter_id);
snprintf(adap->name, sizeof(adap->name),
- "Nomadik I2C%d at %lx", pdev->id, (unsigned long)res->start);
-
- /* fetch the controller id */
- adap->nr = pdev->id;
+ "Nomadik I2C%d at %pR", adap->nr, &adev->res);
+ atomic_inc(&adapter_id);
/* fetch the controller configuration from machine */
dev->cfg.clk_freq = pdata->clk_freq;
@@ -982,16 +992,18 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
i2c_set_adapdata(adap, dev);
- dev_info(&pdev->dev,
+ dev_info(&adev->dev,
"initialize %s on virtual base %p\n",
adap->name, dev->virtbase);
ret = i2c_add_numbered_adapter(adap);
if (ret) {
- dev_err(&pdev->dev, "failed to add adapter\n");
+ dev_err(&adev->dev, "failed to add adapter\n");
goto err_add_adap;
}
+ pm_runtime_put(&adev->dev);
+
return 0;
err_add_adap:
@@ -999,25 +1011,21 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
err_no_clk:
if (dev->regulator)
regulator_put(dev->regulator);
- pm_runtime_disable(&pdev->dev);
free_irq(dev->irq, dev);
err_irq:
iounmap(dev->virtbase);
err_no_ioremap:
- release_mem_region(res->start, resource_size(res));
- err_no_region:
- platform_set_drvdata(pdev, NULL);
- err_no_resource:
+ amba_set_drvdata(adev, NULL);
kfree(dev);
err_no_mem:
return ret;
}
-static int __devexit nmk_i2c_remove(struct platform_device *pdev)
+static int nmk_i2c_remove(struct amba_device *adev)
{
- struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- struct nmk_i2c_dev *dev = platform_get_drvdata(pdev);
+ struct resource *res = &adev->res;
+ struct nmk_i2c_dev *dev = amba_get_drvdata(adev);
i2c_del_adapter(&dev->adap);
flush_i2c_fifo(dev);
@@ -1032,31 +1040,46 @@ static int __devexit nmk_i2c_remove(struct platform_device *pdev)
clk_put(dev->clk);
if (dev->regulator)
regulator_put(dev->regulator);
- pm_runtime_disable(&pdev->dev);
- platform_set_drvdata(pdev, NULL);
+ pm_runtime_disable(&adev->dev);
+ amba_set_drvdata(adev, NULL);
kfree(dev);
return 0;
}
-static struct platform_driver nmk_i2c_driver = {
- .driver = {
+static struct amba_id nmk_i2c_ids[] = {
+ {
+ .id = 0x00180024,
+ .mask = 0x00ffffff,
+ },
+ {
+ .id = 0x00380024,
+ .mask = 0x00ffffff,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(amba, nmk_i2c_ids);
+
+static struct amba_driver nmk_i2c_driver = {
+ .drv = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
.pm = &nmk_i2c_pm,
},
+ .id_table = nmk_i2c_ids,
.probe = nmk_i2c_probe,
- .remove = __devexit_p(nmk_i2c_remove),
+ .remove = nmk_i2c_remove,
};
static int __init nmk_i2c_init(void)
{
- return platform_driver_register(&nmk_i2c_driver);
+ return amba_driver_register(&nmk_i2c_driver);
}
static void __exit nmk_i2c_exit(void)
{
- platform_driver_unregister(&nmk_i2c_driver);
+ amba_driver_unregister(&nmk_i2c_driver);
}
subsys_initcall(nmk_i2c_init);
@@ -1065,4 +1088,3 @@ module_exit(nmk_i2c_exit);
MODULE_AUTHOR("Sachin Verma, Srinidhi KASAGAR");
MODULE_DESCRIPTION("Nomadik/Ux500 I2C driver");
MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 75194c579b6d..bffd5501ac2d 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -10,40 +10,9 @@
*/
/*
- * Device tree configuration:
- *
- * Required properties:
- * - compatible : "opencores,i2c-ocores"
- * - reg : bus address start and address range size of device
- * - interrupts : interrupt number
- * - regstep : size of device registers in bytes
- * - clock-frequency : frequency of bus clock in Hz
- *
- * Example:
- *
- * i2c0: ocores@a0000000 {
- * compatible = "opencores,i2c-ocores";
- * reg = <0xa0000000 0x8>;
- * interrupts = <10>;
- *
- * regstep = <1>;
- * clock-frequency = <20000000>;
- *
- * -- Devices connected on this I2C bus get
- * -- defined here; address- and size-cells
- * -- apply to these child devices
- *
- * #address-cells = <1>;
- * #size-cells = <0>;
- *
- * dummy@60 {
- * compatible = "dummy";
- * reg = <60>;
- * };
- * };
- *
+ * This driver can be used from the device tree, see
+ * Documentation/devicetree/bindings/i2c/ocore-i2c.txt
*/
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
@@ -56,10 +25,12 @@
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/of_i2c.h>
+#include <linux/log2.h>
struct ocores_i2c {
void __iomem *base;
- int regstep;
+ u32 reg_shift;
+ u32 reg_io_width;
wait_queue_head_t wait;
struct i2c_adapter adap;
struct i2c_msg *msg;
@@ -102,12 +73,22 @@ struct ocores_i2c {
static inline void oc_setreg(struct ocores_i2c *i2c, int reg, u8 value)
{
- iowrite8(value, i2c->base + reg * i2c->regstep);
+ if (i2c->reg_io_width == 4)
+ iowrite32(value, i2c->base + (reg << i2c->reg_shift));
+ else if (i2c->reg_io_width == 2)
+ iowrite16(value, i2c->base + (reg << i2c->reg_shift));
+ else
+ iowrite8(value, i2c->base + (reg << i2c->reg_shift));
}
static inline u8 oc_getreg(struct ocores_i2c *i2c, int reg)
{
- return ioread8(i2c->base + reg * i2c->regstep);
+ if (i2c->reg_io_width == 4)
+ return ioread32(i2c->base + (reg << i2c->reg_shift));
+ else if (i2c->reg_io_width == 2)
+ return ioread16(i2c->base + (reg << i2c->reg_shift));
+ else
+ return ioread8(i2c->base + (reg << i2c->reg_shift));
}
static void ocores_process(struct ocores_i2c *i2c)
@@ -247,26 +228,35 @@ static struct i2c_adapter ocores_adapter = {
};
#ifdef CONFIG_OF
-static int ocores_i2c_of_probe(struct platform_device* pdev,
- struct ocores_i2c* i2c)
+static int ocores_i2c_of_probe(struct platform_device *pdev,
+ struct ocores_i2c *i2c)
{
- const __be32* val;
-
- val = of_get_property(pdev->dev.of_node, "regstep", NULL);
- if (!val) {
- dev_err(&pdev->dev, "Missing required parameter 'regstep'");
- return -ENODEV;
+ struct device_node *np = pdev->dev.of_node;
+ u32 val;
+
+ if (of_property_read_u32(np, "reg-shift", &i2c->reg_shift)) {
+ /* no 'reg-shift', check for deprecated 'regstep' */
+ if (!of_property_read_u32(np, "regstep", &val)) {
+ if (!is_power_of_2(val)) {
+ dev_err(&pdev->dev, "invalid regstep %d\n",
+ val);
+ return -EINVAL;
+ }
+ i2c->reg_shift = ilog2(val);
+ dev_warn(&pdev->dev,
+ "regstep property deprecated, use reg-shift\n");
+ }
}
- i2c->regstep = be32_to_cpup(val);
- val = of_get_property(pdev->dev.of_node, "clock-frequency", NULL);
- if (!val) {
+ if (of_property_read_u32(np, "clock-frequency", &val)) {
dev_err(&pdev->dev,
- "Missing required parameter 'clock-frequency'");
+ "Missing required parameter 'clock-frequency'\n");
return -ENODEV;
}
- i2c->clock_khz = be32_to_cpup(val) / 1000;
+ i2c->clock_khz = val / 1000;
+ of_property_read_u32(pdev->dev.of_node, "reg-io-width",
+ &i2c->reg_io_width);
return 0;
}
#else
@@ -308,7 +298,8 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
pdata = pdev->dev.platform_data;
if (pdata) {
- i2c->regstep = pdata->regstep;
+ i2c->reg_shift = pdata->reg_shift;
+ i2c->reg_io_width = pdata->reg_io_width;
i2c->clock_khz = pdata->clock_khz;
} else {
ret = ocores_i2c_of_probe(pdev, i2c);
@@ -316,6 +307,9 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
return ret;
}
+ if (i2c->reg_io_width == 0)
+ i2c->reg_io_width = 1; /* Set to default value */
+
ocores_init(i2c);
init_waitqueue_head(&i2c->wait);
@@ -351,7 +345,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
return 0;
}
-static int __devexit ocores_i2c_remove(struct platform_device* pdev)
+static int __devexit ocores_i2c_remove(struct platform_device *pdev)
{
struct ocores_i2c *i2c = platform_get_drvdata(pdev);
@@ -367,9 +361,9 @@ static int __devexit ocores_i2c_remove(struct platform_device* pdev)
}
#ifdef CONFIG_PM
-static int ocores_i2c_suspend(struct platform_device *pdev, pm_message_t state)
+static int ocores_i2c_suspend(struct device *dev)
{
- struct ocores_i2c *i2c = platform_get_drvdata(pdev);
+ struct ocores_i2c *i2c = dev_get_drvdata(dev);
u8 ctrl = oc_getreg(i2c, OCI2C_CONTROL);
/* make sure the device is disabled */
@@ -378,17 +372,19 @@ static int ocores_i2c_suspend(struct platform_device *pdev, pm_message_t state)
return 0;
}
-static int ocores_i2c_resume(struct platform_device *pdev)
+static int ocores_i2c_resume(struct device *dev)
{
- struct ocores_i2c *i2c = platform_get_drvdata(pdev);
+ struct ocores_i2c *i2c = dev_get_drvdata(dev);
ocores_init(i2c);
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(ocores_i2c_pm, ocores_i2c_suspend, ocores_i2c_resume);
+#define OCORES_I2C_PM (&ocores_i2c_pm)
#else
-#define ocores_i2c_suspend NULL
-#define ocores_i2c_resume NULL
+#define OCORES_I2C_PM NULL
#endif
static struct of_device_id ocores_i2c_match[] = {
@@ -400,12 +396,11 @@ MODULE_DEVICE_TABLE(of, ocores_i2c_match);
static struct platform_driver ocores_i2c_driver = {
.probe = ocores_i2c_probe,
.remove = __devexit_p(ocores_i2c_remove),
- .suspend = ocores_i2c_suspend,
- .resume = ocores_i2c_resume,
.driver = {
.owner = THIS_MODULE,
.name = "ocores-i2c",
.of_match_table = ocores_i2c_match,
+ .pm = OCORES_I2C_PM,
},
};
diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c
index ee139a598814..f44c83549fe5 100644
--- a/drivers/i2c/busses/i2c-octeon.c
+++ b/drivers/i2c/busses/i2c-octeon.c
@@ -2,7 +2,7 @@
* (C) Copyright 2009-2010
* Nokia Siemens Networks, michael.lawnick.ext@nsn.com
*
- * Portions Copyright (C) 2010 Cavium Networks, Inc.
+ * Portions Copyright (C) 2010, 2011 Cavium Networks, Inc.
*
* This is a driver for the i2c adapter in Cavium Networks' OCTEON processors.
*
@@ -11,17 +11,18 @@
* warranty of any kind, whether express or implied.
*/
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of_i2c.h>
+#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
-
-#include <linux/io.h>
#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of.h>
#include <asm/octeon/octeon.h>
@@ -65,7 +66,7 @@ struct octeon_i2c {
wait_queue_head_t queue;
struct i2c_adapter adap;
int irq;
- int twsi_freq;
+ u32 twsi_freq;
int sys_freq;
resource_size_t twsi_phys;
void __iomem *twsi_base;
@@ -121,10 +122,8 @@ static u8 octeon_i2c_read_sw(struct octeon_i2c *i2c, u64 eop_reg)
*/
static void octeon_i2c_write_int(struct octeon_i2c *i2c, u64 data)
{
- u64 tmp;
-
__raw_writeq(data, i2c->twsi_base + TWSI_INT);
- tmp = __raw_readq(i2c->twsi_base + TWSI_INT);
+ __raw_readq(i2c->twsi_base + TWSI_INT);
}
/**
@@ -515,7 +514,6 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev)
{
int irq, result = 0;
struct octeon_i2c *i2c;
- struct octeon_i2c_data *i2c_data;
struct resource *res_mem;
/* All adaptors have an irq. */
@@ -523,86 +521,90 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
- i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
+ i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
if (!i2c) {
dev_err(&pdev->dev, "kzalloc failed\n");
result = -ENOMEM;
goto out;
}
i2c->dev = &pdev->dev;
- i2c_data = pdev->dev.platform_data;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res_mem == NULL) {
dev_err(i2c->dev, "found no memory resource\n");
result = -ENXIO;
- goto fail_region;
+ goto out;
}
+ i2c->twsi_phys = res_mem->start;
+ i2c->regsize = resource_size(res_mem);
- if (i2c_data == NULL) {
- dev_err(i2c->dev, "no I2C frequency data\n");
+ /*
+ * "clock-rate" is a legacy binding, the official binding is
+ * "clock-frequency". Try the official one first and then
+ * fall back if it doesn't exist.
+ */
+ if (of_property_read_u32(pdev->dev.of_node,
+ "clock-frequency", &i2c->twsi_freq) &&
+ of_property_read_u32(pdev->dev.of_node,
+ "clock-rate", &i2c->twsi_freq)) {
+ dev_err(i2c->dev,
+ "no I2C 'clock-rate' or 'clock-frequency' property\n");
result = -ENXIO;
- goto fail_region;
+ goto out;
}
- i2c->twsi_phys = res_mem->start;
- i2c->regsize = resource_size(res_mem);
- i2c->twsi_freq = i2c_data->i2c_freq;
- i2c->sys_freq = i2c_data->sys_freq;
+ i2c->sys_freq = octeon_get_io_clock_rate();
- if (!request_mem_region(i2c->twsi_phys, i2c->regsize, res_mem->name)) {
+ if (!devm_request_mem_region(&pdev->dev, i2c->twsi_phys, i2c->regsize,
+ res_mem->name)) {
dev_err(i2c->dev, "request_mem_region failed\n");
- goto fail_region;
+ goto out;
}
- i2c->twsi_base = ioremap(i2c->twsi_phys, i2c->regsize);
+ i2c->twsi_base = devm_ioremap(&pdev->dev, i2c->twsi_phys, i2c->regsize);
init_waitqueue_head(&i2c->queue);
i2c->irq = irq;
- result = request_irq(i2c->irq, octeon_i2c_isr, 0, DRV_NAME, i2c);
+ result = devm_request_irq(&pdev->dev, i2c->irq,
+ octeon_i2c_isr, 0, DRV_NAME, i2c);
if (result < 0) {
dev_err(i2c->dev, "failed to attach interrupt\n");
- goto fail_irq;
+ goto out;
}
result = octeon_i2c_initlowlevel(i2c);
if (result) {
dev_err(i2c->dev, "init low level failed\n");
- goto fail_add;
+ goto out;
}
result = octeon_i2c_setclock(i2c);
if (result) {
dev_err(i2c->dev, "clock init failed\n");
- goto fail_add;
+ goto out;
}
i2c->adap = octeon_i2c_ops;
i2c->adap.dev.parent = &pdev->dev;
- i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0;
+ i2c->adap.dev.of_node = pdev->dev.of_node;
i2c_set_adapdata(&i2c->adap, i2c);
platform_set_drvdata(pdev, i2c);
- result = i2c_add_numbered_adapter(&i2c->adap);
+ result = i2c_add_adapter(&i2c->adap);
if (result < 0) {
dev_err(i2c->dev, "failed to add adapter\n");
goto fail_add;
}
-
dev_info(i2c->dev, "version %s\n", DRV_VERSION);
- return result;
+ of_i2c_register_devices(&i2c->adap);
+
+ return 0;
fail_add:
platform_set_drvdata(pdev, NULL);
- free_irq(i2c->irq, i2c);
-fail_irq:
- iounmap(i2c->twsi_base);
- release_mem_region(i2c->twsi_phys, i2c->regsize);
-fail_region:
- kfree(i2c);
out:
return result;
};
@@ -613,19 +615,24 @@ static int __devexit octeon_i2c_remove(struct platform_device *pdev)
i2c_del_adapter(&i2c->adap);
platform_set_drvdata(pdev, NULL);
- free_irq(i2c->irq, i2c);
- iounmap(i2c->twsi_base);
- release_mem_region(i2c->twsi_phys, i2c->regsize);
- kfree(i2c);
return 0;
};
+static struct of_device_id octeon_i2c_match[] = {
+ {
+ .compatible = "cavium,octeon-3860-twsi",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, octeon_i2c_match);
+
static struct platform_driver octeon_i2c_driver = {
.probe = octeon_i2c_probe,
.remove = __devexit_p(octeon_i2c_remove),
.driver = {
.owner = THIS_MODULE,
.name = DRV_NAME,
+ .of_match_table = octeon_i2c_match,
},
};
@@ -635,4 +642,3 @@ MODULE_AUTHOR("Michael Lawnick <michael.lawnick.ext@nsn.com>");
MODULE_DESCRIPTION("I2C-Bus adapter for Cavium OCTEON processors");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
-MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 801df6000e9b..5d19a49803c1 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -49,8 +49,8 @@
/* I2C controller revisions present on specific hardware */
#define OMAP_I2C_REV_ON_2430 0x36
-#define OMAP_I2C_REV_ON_3430 0x3C
-#define OMAP_I2C_REV_ON_3530_4430 0x40
+#define OMAP_I2C_REV_ON_3430_3530 0x3C
+#define OMAP_I2C_REV_ON_3630_4430 0x40
/* timeout waiting for the controller to respond */
#define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000))
@@ -173,7 +173,7 @@ enum {
/* Errata definitions */
#define I2C_OMAP_ERRATA_I207 (1 << 0)
-#define I2C_OMAP3_1P153 (1 << 1)
+#define I2C_OMAP_ERRATA_I462 (1 << 1)
struct omap_i2c_dev {
struct device *dev;
@@ -269,47 +269,6 @@ static inline u16 omap_i2c_read_reg(struct omap_i2c_dev *i2c_dev, int reg)
(i2c_dev->regs[reg] << i2c_dev->reg_shift));
}
-static void omap_i2c_unidle(struct omap_i2c_dev *dev)
-{
- if (dev->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) {
- omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
- omap_i2c_write_reg(dev, OMAP_I2C_PSC_REG, dev->pscstate);
- omap_i2c_write_reg(dev, OMAP_I2C_SCLL_REG, dev->scllstate);
- omap_i2c_write_reg(dev, OMAP_I2C_SCLH_REG, dev->sclhstate);
- omap_i2c_write_reg(dev, OMAP_I2C_BUF_REG, dev->bufstate);
- omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG, dev->syscstate);
- omap_i2c_write_reg(dev, OMAP_I2C_WE_REG, dev->westate);
- omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN);
- }
-
- /*
- * Don't write to this register if the IE state is 0 as it can
- * cause deadlock.
- */
- if (dev->iestate)
- omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, dev->iestate);
-}
-
-static void omap_i2c_idle(struct omap_i2c_dev *dev)
-{
- u16 iv;
-
- dev->iestate = omap_i2c_read_reg(dev, OMAP_I2C_IE_REG);
- if (dev->dtrev == OMAP_I2C_IP_VERSION_2)
- omap_i2c_write_reg(dev, OMAP_I2C_IP_V2_IRQENABLE_CLR, 1);
- else
- omap_i2c_write_reg(dev, OMAP_I2C_IE_REG, 0);
-
- if (dev->rev < OMAP_I2C_OMAP1_REV_2) {
- iv = omap_i2c_read_reg(dev, OMAP_I2C_IV_REG); /* Read clears */
- } else {
- omap_i2c_write_reg(dev, OMAP_I2C_STAT_REG, dev->iestate);
-
- /* Flush posted write */
- omap_i2c_read_reg(dev, OMAP_I2C_STAT_REG);
- }
-}
-
static int omap_i2c_init(struct omap_i2c_dev *dev)
{
u16 psc = 0, scll = 0, sclh = 0, buf = 0;
@@ -346,7 +305,7 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
omap_i2c_write_reg(dev, OMAP_I2C_SYSC_REG,
SYSC_AUTOIDLE_MASK);
- } else if (dev->rev >= OMAP_I2C_REV_ON_3430) {
+ } else if (dev->rev >= OMAP_I2C_REV_ON_3430_3530) {
dev->syscstate = SYSC_AUTOIDLE_MASK;
dev->syscstate |= SYSC_ENAWAKEUP_MASK;
dev->syscstate |= (SYSC_IDLEMODE_SMART <<
@@ -468,11 +427,6 @@ static int omap_i2c_init(struct omap_i2c_dev *dev)
/* Take the I2C module out of reset: */
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN);
- dev->errata = 0;
-
- if (dev->flags & OMAP_I2C_FLAG_APPLY_ERRATA_I207)
- dev->errata |= I2C_OMAP_ERRATA_I207;
-
/* Enable interrupts */
dev->iestate = (OMAP_I2C_IE_XRDY | OMAP_I2C_IE_RRDY |
OMAP_I2C_IE_ARDY | OMAP_I2C_IE_NACK |
@@ -514,7 +468,7 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,
struct i2c_msg *msg, int stop)
{
struct omap_i2c_dev *dev = i2c_get_adapdata(adap);
- int r;
+ unsigned long timeout;
u16 w;
dev_dbg(dev->dev, "addr: 0x%04x, len: %d, flags: 0x%x, stop: %d\n",
@@ -536,7 +490,7 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,
w |= OMAP_I2C_BUF_RXFIF_CLR | OMAP_I2C_BUF_TXFIF_CLR;
omap_i2c_write_reg(dev, OMAP_I2C_BUF_REG, w);
- init_completion(&dev->cmd_complete);
+ INIT_COMPLETION(dev->cmd_complete);
dev->cmd_err = 0;
w = OMAP_I2C_CON_EN | OMAP_I2C_CON_MST | OMAP_I2C_CON_STT;
@@ -545,6 +499,8 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,
if (dev->speed > 400)
w |= OMAP_I2C_CON_OPMODE_HS;
+ if (msg->flags & I2C_M_STOP)
+ stop = 1;
if (msg->flags & I2C_M_TEN)
w |= OMAP_I2C_CON_XA;
if (!(msg->flags & I2C_M_RD))
@@ -582,12 +538,10 @@ static int omap_i2c_xfer_msg(struct i2c_adapter *adap,
* REVISIT: We should abort the transfer on signals, but the bus goes
* into arbitration and we're currently unable to recover from it.
*/
- r = wait_for_completion_timeout(&dev->cmd_complete,
- OMAP_I2C_TIMEOUT);
+ timeout = wait_for_completion_timeout(&dev->cmd_complete,
+ OMAP_I2C_TIMEOUT);
dev->buf_len = 0;
- if (r < 0)
- return r;
- if (r == 0) {
+ if (timeout == 0) {
dev_err(dev->dev, "controller timed out\n");
omap_i2c_init(dev);
return -ETIMEDOUT;
@@ -628,7 +582,9 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
int i;
int r;
- pm_runtime_get_sync(dev->dev);
+ r = pm_runtime_get_sync(dev->dev);
+ if (IS_ERR_VALUE(r))
+ goto out;
r = omap_i2c_wait_for_bb(dev);
if (r < 0)
@@ -658,7 +614,8 @@ out:
static u32
omap_i2c_func(struct i2c_adapter *adap)
{
- return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
+ return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK) |
+ I2C_FUNC_PROTOCOL_MANGLING;
}
static inline void
@@ -764,11 +721,11 @@ omap_i2c_omap1_isr(int this_irq, void *dev_id)
#endif
/*
- * OMAP3430 Errata 1.153: When an XRDY/XDR is hit, wait for XUDF before writing
+ * OMAP3430 Errata i462: When an XRDY/XDR is hit, wait for XUDF before writing
* data to DATA_REG. Otherwise some data bytes can be lost while transferring
* them from the memory to the I2C interface.
*/
-static int errata_omap3_1p153(struct omap_i2c_dev *dev, u16 *stat, int *err)
+static int errata_omap3_i462(struct omap_i2c_dev *dev, u16 *stat, int *err)
{
unsigned long timeout = 10000;
@@ -776,7 +733,6 @@ static int errata_omap3_1p153(struct omap_i2c_dev *dev, u16 *stat, int *err)
if (*stat & (OMAP_I2C_STAT_NACK | OMAP_I2C_STAT_AL)) {
omap_i2c_ack_stat(dev, *stat & (OMAP_I2C_STAT_XRDY |
OMAP_I2C_STAT_XDR));
- *err |= OMAP_I2C_STAT_XUDF;
return -ETIMEDOUT;
}
@@ -789,6 +745,7 @@ static int errata_omap3_1p153(struct omap_i2c_dev *dev, u16 *stat, int *err)
return 0;
}
+ *err |= OMAP_I2C_STAT_XUDF;
return 0;
}
@@ -927,8 +884,8 @@ complete:
break;
}
- if ((dev->errata & I2C_OMAP3_1P153) &&
- errata_omap3_1p153(dev, &stat, &err))
+ if ((dev->errata & I2C_OMAP_ERRATA_I462) &&
+ errata_omap3_i462(dev, &stat, &err))
goto complete;
omap_i2c_write_reg(dev, OMAP_I2C_DATA_REG, w);
@@ -1045,6 +1002,7 @@ omap_i2c_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, dev);
+ init_completion(&dev->cmd_complete);
dev->reg_shift = (dev->flags >> OMAP_I2C_FLAG_BUS_SHIFT__SHIFT) & 3;
@@ -1054,12 +1012,19 @@ omap_i2c_probe(struct platform_device *pdev)
dev->regs = (u8 *)reg_map_ip_v1;
pm_runtime_enable(dev->dev);
- pm_runtime_get_sync(dev->dev);
+ r = pm_runtime_get_sync(dev->dev);
+ if (IS_ERR_VALUE(r))
+ goto err_free_mem;
dev->rev = omap_i2c_read_reg(dev, OMAP_I2C_REV_REG) & 0xff;
- if (dev->rev <= OMAP_I2C_REV_ON_3430)
- dev->errata |= I2C_OMAP3_1P153;
+ dev->errata = 0;
+
+ if (dev->flags & OMAP_I2C_FLAG_APPLY_ERRATA_I207)
+ dev->errata |= I2C_OMAP_ERRATA_I207;
+
+ if (dev->rev <= OMAP_I2C_REV_ON_3430_3530)
+ dev->errata |= I2C_OMAP_ERRATA_I462;
if (!(dev->flags & OMAP_I2C_FLAG_NO_FIFO)) {
u16 s;
@@ -1076,7 +1041,7 @@ omap_i2c_probe(struct platform_device *pdev)
dev->fifo_size = (dev->fifo_size / 2);
- if (dev->rev >= OMAP_I2C_REV_ON_3530_4430)
+ if (dev->rev >= OMAP_I2C_REV_ON_3630_4430)
dev->b_hw = 0; /* Disable hardware fixes */
else
dev->b_hw = 1; /* Enable hardware fixes */
@@ -1092,7 +1057,7 @@ omap_i2c_probe(struct platform_device *pdev)
isr = (dev->rev < OMAP_I2C_OMAP1_REV_2) ? omap_i2c_omap1_isr :
omap_i2c_isr;
- r = request_irq(dev->irq, isr, 0, pdev->name, dev);
+ r = request_irq(dev->irq, isr, IRQF_NO_SUSPEND, pdev->name, dev);
if (r) {
dev_err(dev->dev, "failure requesting irq %i\n", dev->irq);
@@ -1102,8 +1067,6 @@ omap_i2c_probe(struct platform_device *pdev)
dev_info(dev->dev, "bus %d rev%d.%d.%d at %d kHz\n", pdev->id,
dev->dtrev, dev->rev >> 4, dev->rev & 0xf, dev->speed);
- pm_runtime_put(dev->dev);
-
adap = &dev->adapter;
i2c_set_adapdata(adap, dev);
adap->owner = THIS_MODULE;
@@ -1123,6 +1086,8 @@ omap_i2c_probe(struct platform_device *pdev)
of_i2c_register_devices(adap);
+ pm_runtime_put(dev->dev);
+
return 0;
err_free_irq:
@@ -1131,6 +1096,7 @@ err_unuse_clocks:
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
pm_runtime_put(dev->dev);
iounmap(dev->base);
+ pm_runtime_disable(&pdev->dev);
err_free_mem:
platform_set_drvdata(pdev, NULL);
kfree(dev);
@@ -1140,17 +1106,23 @@ err_release_region:
return r;
}
-static int
-omap_i2c_remove(struct platform_device *pdev)
+static int __devexit omap_i2c_remove(struct platform_device *pdev)
{
struct omap_i2c_dev *dev = platform_get_drvdata(pdev);
struct resource *mem;
+ int ret;
platform_set_drvdata(pdev, NULL);
free_irq(dev->irq, dev);
i2c_del_adapter(&dev->adapter);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+
omap_i2c_write_reg(dev, OMAP_I2C_CON_REG, 0);
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
iounmap(dev->base);
kfree(dev);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1158,13 +1130,26 @@ omap_i2c_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
#ifdef CONFIG_PM_RUNTIME
static int omap_i2c_runtime_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct omap_i2c_dev *_dev = platform_get_drvdata(pdev);
+ u16 iv;
+
+ _dev->iestate = omap_i2c_read_reg(_dev, OMAP_I2C_IE_REG);
+
+ omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, 0);
- omap_i2c_idle(_dev);
+ if (_dev->rev < OMAP_I2C_OMAP1_REV_2) {
+ iv = omap_i2c_read_reg(_dev, OMAP_I2C_IV_REG); /* Read clears */
+ } else {
+ omap_i2c_write_reg(_dev, OMAP_I2C_STAT_REG, _dev->iestate);
+
+ /* Flush posted write */
+ omap_i2c_read_reg(_dev, OMAP_I2C_STAT_REG);
+ }
return 0;
}
@@ -1174,23 +1159,40 @@ static int omap_i2c_runtime_resume(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct omap_i2c_dev *_dev = platform_get_drvdata(pdev);
- omap_i2c_unidle(_dev);
+ if (_dev->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) {
+ omap_i2c_write_reg(_dev, OMAP_I2C_CON_REG, 0);
+ omap_i2c_write_reg(_dev, OMAP_I2C_PSC_REG, _dev->pscstate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_SCLL_REG, _dev->scllstate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_SCLH_REG, _dev->sclhstate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_BUF_REG, _dev->bufstate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_SYSC_REG, _dev->syscstate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_WE_REG, _dev->westate);
+ omap_i2c_write_reg(_dev, OMAP_I2C_CON_REG, OMAP_I2C_CON_EN);
+ }
+
+ /*
+ * Don't write to this register if the IE state is 0 as it can
+ * cause deadlock.
+ */
+ if (_dev->iestate)
+ omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, _dev->iestate);
return 0;
}
+#endif /* CONFIG_PM_RUNTIME */
static struct dev_pm_ops omap_i2c_pm_ops = {
- .runtime_suspend = omap_i2c_runtime_suspend,
- .runtime_resume = omap_i2c_runtime_resume,
+ SET_RUNTIME_PM_OPS(omap_i2c_runtime_suspend,
+ omap_i2c_runtime_resume, NULL)
};
#define OMAP_I2C_PM_OPS (&omap_i2c_pm_ops)
#else
#define OMAP_I2C_PM_OPS NULL
-#endif
+#endif /* CONFIG_PM */
static struct platform_driver omap_i2c_driver = {
.probe = omap_i2c_probe,
- .remove = omap_i2c_remove,
+ .remove = __devexit_p(omap_i2c_remove),
.driver = {
.name = "omap_i2c",
.owner = THIS_MODULE,
diff --git a/drivers/i2c/busses/i2c-pasemi.c b/drivers/i2c/busses/i2c-pasemi.c
index eaaea73209c5..12edefd4183a 100644
--- a/drivers/i2c/busses/i2c-pasemi.c
+++ b/drivers/i2c/busses/i2c-pasemi.c
@@ -415,19 +415,8 @@ static struct pci_driver pasemi_smb_driver = {
.remove = __devexit_p(pasemi_smb_remove),
};
-static int __init pasemi_smb_init(void)
-{
- return pci_register_driver(&pasemi_smb_driver);
-}
-
-static void __exit pasemi_smb_exit(void)
-{
- pci_unregister_driver(&pasemi_smb_driver);
-}
+module_pci_driver(pasemi_smb_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
MODULE_DESCRIPTION("PA Semi PWRficient SMBus driver");
-
-module_init(pasemi_smb_init);
-module_exit(pasemi_smb_exit);
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index c14d48dd601a..ef511df2c965 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -21,11 +21,12 @@
Supports:
Intel PIIX4, 440MX
Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100
- ATI IXP200, IXP300, IXP400, SB600, SB700, SB800
+ ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800
AMD Hudson-2
SMSC Victory66
- Note: we assume there can only be one device, with one SMBus interface.
+ Note: we assume there can only be one device, with one or more
+ SMBus interfaces.
*/
#include <linux/module.h>
@@ -94,10 +95,8 @@ MODULE_PARM_DESC(force_addr,
"Forcibly enable the PIIX4 at the given address. "
"EXTREMELY DANGEROUS!");
-static unsigned short piix4_smba;
static int srvrworks_csb5_delay;
static struct pci_driver piix4_driver;
-static struct i2c_adapter piix4_adapter;
static struct dmi_system_id __devinitdata piix4_dmi_blacklist[] = {
{
@@ -127,10 +126,15 @@ static struct dmi_system_id __devinitdata piix4_dmi_ibm[] = {
{ },
};
+struct i2c_piix4_adapdata {
+ unsigned short smba;
+};
+
static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
const struct pci_device_id *id)
{
unsigned char temp;
+ unsigned short piix4_smba;
if ((PIIX4_dev->vendor == PCI_VENDOR_ID_SERVERWORKS) &&
(PIIX4_dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5))
@@ -206,7 +210,6 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
dev_err(&PIIX4_dev->dev,
"Host SMBus controller not enabled!\n");
release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
return -ENODEV;
}
}
@@ -224,12 +227,13 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
"SMBus Host Controller at 0x%x, revision %d\n",
piix4_smba, temp);
- return 0;
+ return piix4_smba;
}
static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev,
const struct pci_device_id *id)
{
+ unsigned short piix4_smba;
unsigned short smba_idx = 0xcd6;
u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en = 0x2c;
@@ -273,7 +277,6 @@ static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev,
dev_err(&PIIX4_dev->dev, "SMBus I2C bus config region "
"0x%x already in use!\n", piix4_smba + i2ccfg_offset);
release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
return -EBUSY;
}
i2ccfg = inb_p(piix4_smba + i2ccfg_offset);
@@ -288,30 +291,72 @@ static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev,
"SMBus Host Controller at 0x%x, revision %d\n",
piix4_smba, i2ccfg >> 4);
- return 0;
+ return piix4_smba;
+}
+
+static int __devinit piix4_setup_aux(struct pci_dev *PIIX4_dev,
+ const struct pci_device_id *id,
+ unsigned short base_reg_addr)
+{
+ /* Set up auxiliary SMBus controllers found on some
+ * AMD chipsets e.g. SP5100 (SB700 derivative) */
+
+ unsigned short piix4_smba;
+
+ /* Read address of auxiliary SMBus controller */
+ pci_read_config_word(PIIX4_dev, base_reg_addr, &piix4_smba);
+ if ((piix4_smba & 1) == 0) {
+ dev_dbg(&PIIX4_dev->dev,
+ "Auxiliary SMBus controller not enabled\n");
+ return -ENODEV;
+ }
+
+ piix4_smba &= 0xfff0;
+ if (piix4_smba == 0) {
+ dev_dbg(&PIIX4_dev->dev,
+ "Auxiliary SMBus base address uninitialized\n");
+ return -ENODEV;
+ }
+
+ if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name))
+ return -ENODEV;
+
+ if (!request_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) {
+ dev_err(&PIIX4_dev->dev, "Auxiliary SMBus region 0x%x "
+ "already in use!\n", piix4_smba);
+ return -EBUSY;
+ }
+
+ dev_info(&PIIX4_dev->dev,
+ "Auxiliary SMBus Host Controller at 0x%x\n",
+ piix4_smba);
+
+ return piix4_smba;
}
-static int piix4_transaction(void)
+static int piix4_transaction(struct i2c_adapter *piix4_adapter)
{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(piix4_adapter);
+ unsigned short piix4_smba = adapdata->smba;
int temp;
int result = 0;
int timeout = 0;
- dev_dbg(&piix4_adapter.dev, "Transaction (pre): CNT=%02x, CMD=%02x, "
+ dev_dbg(&piix4_adapter->dev, "Transaction (pre): CNT=%02x, CMD=%02x, "
"ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
inb_p(SMBHSTDAT1));
/* Make sure the SMBus host is ready to start transmitting */
if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
- dev_dbg(&piix4_adapter.dev, "SMBus busy (%02x). "
+ dev_dbg(&piix4_adapter->dev, "SMBus busy (%02x). "
"Resetting...\n", temp);
outb_p(temp, SMBHSTSTS);
if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
- dev_err(&piix4_adapter.dev, "Failed! (%02x)\n", temp);
+ dev_err(&piix4_adapter->dev, "Failed! (%02x)\n", temp);
return -EBUSY;
} else {
- dev_dbg(&piix4_adapter.dev, "Successful!\n");
+ dev_dbg(&piix4_adapter->dev, "Successful!\n");
}
}
@@ -330,35 +375,35 @@ static int piix4_transaction(void)
/* If the SMBus is still busy, we give up */
if (timeout == MAX_TIMEOUT) {
- dev_err(&piix4_adapter.dev, "SMBus Timeout!\n");
+ dev_err(&piix4_adapter->dev, "SMBus Timeout!\n");
result = -ETIMEDOUT;
}
if (temp & 0x10) {
result = -EIO;
- dev_err(&piix4_adapter.dev, "Error: Failed bus transaction\n");
+ dev_err(&piix4_adapter->dev, "Error: Failed bus transaction\n");
}
if (temp & 0x08) {
result = -EIO;
- dev_dbg(&piix4_adapter.dev, "Bus collision! SMBus may be "
+ dev_dbg(&piix4_adapter->dev, "Bus collision! SMBus may be "
"locked until next hard reset. (sorry!)\n");
/* Clock stops and slave is stuck in mid-transmission */
}
if (temp & 0x04) {
result = -ENXIO;
- dev_dbg(&piix4_adapter.dev, "Error: no response!\n");
+ dev_dbg(&piix4_adapter->dev, "Error: no response!\n");
}
if (inb_p(SMBHSTSTS) != 0x00)
outb_p(inb(SMBHSTSTS), SMBHSTSTS);
if ((temp = inb_p(SMBHSTSTS)) != 0x00) {
- dev_err(&piix4_adapter.dev, "Failed reset at end of "
+ dev_err(&piix4_adapter->dev, "Failed reset at end of "
"transaction (%02x)\n", temp);
}
- dev_dbg(&piix4_adapter.dev, "Transaction (post): CNT=%02x, CMD=%02x, "
+ dev_dbg(&piix4_adapter->dev, "Transaction (post): CNT=%02x, CMD=%02x, "
"ADD=%02x, DAT0=%02x, DAT1=%02x\n", inb_p(SMBHSTCNT),
inb_p(SMBHSTCMD), inb_p(SMBHSTADD), inb_p(SMBHSTDAT0),
inb_p(SMBHSTDAT1));
@@ -370,6 +415,8 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
unsigned short flags, char read_write,
u8 command, int size, union i2c_smbus_data * data)
{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(adap);
+ unsigned short piix4_smba = adapdata->smba;
int i, len;
int status;
@@ -426,7 +473,7 @@ static s32 piix4_access(struct i2c_adapter * adap, u16 addr,
outb_p((size & 0x1C) + (ENABLE_INT9 & 1), SMBHSTCNT);
- status = piix4_transaction();
+ status = piix4_transaction(adap);
if (status)
return status;
@@ -466,12 +513,6 @@ static const struct i2c_algorithm smbus_algorithm = {
.functionality = piix4_func,
};
-static struct i2c_adapter piix4_adapter = {
- .owner = THIS_MODULE,
- .class = I2C_CLASS_HWMON | I2C_CLASS_SPD,
- .algo = &smbus_algorithm,
-};
-
static DEFINE_PCI_DEVICE_TABLE(piix4_ids) = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_3) },
@@ -496,6 +537,57 @@ static DEFINE_PCI_DEVICE_TABLE(piix4_ids) = {
MODULE_DEVICE_TABLE (pci, piix4_ids);
+static struct i2c_adapter *piix4_main_adapter;
+static struct i2c_adapter *piix4_aux_adapter;
+
+static int __devinit piix4_add_adapter(struct pci_dev *dev,
+ unsigned short smba,
+ struct i2c_adapter **padap)
+{
+ struct i2c_adapter *adap;
+ struct i2c_piix4_adapdata *adapdata;
+ int retval;
+
+ adap = kzalloc(sizeof(*adap), GFP_KERNEL);
+ if (adap == NULL) {
+ release_region(smba, SMBIOSIZE);
+ return -ENOMEM;
+ }
+
+ adap->owner = THIS_MODULE;
+ adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+ adap->algo = &smbus_algorithm;
+
+ adapdata = kzalloc(sizeof(*adapdata), GFP_KERNEL);
+ if (adapdata == NULL) {
+ kfree(adap);
+ release_region(smba, SMBIOSIZE);
+ return -ENOMEM;
+ }
+
+ adapdata->smba = smba;
+
+ /* set up the sysfs linkage to our parent device */
+ adap->dev.parent = &dev->dev;
+
+ snprintf(adap->name, sizeof(adap->name),
+ "SMBus PIIX4 adapter at %04x", smba);
+
+ i2c_set_adapdata(adap, adapdata);
+
+ retval = i2c_add_adapter(adap);
+ if (retval) {
+ dev_err(&dev->dev, "Couldn't register adapter!\n");
+ kfree(adapdata);
+ kfree(adap);
+ release_region(smba, SMBIOSIZE);
+ return retval;
+ }
+
+ *padap = adap;
+ return 0;
+}
+
static int __devinit piix4_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
@@ -510,30 +602,52 @@ static int __devinit piix4_probe(struct pci_dev *dev,
else
retval = piix4_setup(dev, id);
- if (retval)
+ /* If no main SMBus found, give up */
+ if (retval < 0)
return retval;
- /* set up the sysfs linkage to our parent device */
- piix4_adapter.dev.parent = &dev->dev;
-
- snprintf(piix4_adapter.name, sizeof(piix4_adapter.name),
- "SMBus PIIX4 adapter at %04x", piix4_smba);
+ /* Try to register main SMBus adapter, give up if we can't */
+ retval = piix4_add_adapter(dev, retval, &piix4_main_adapter);
+ if (retval < 0)
+ return retval;
- if ((retval = i2c_add_adapter(&piix4_adapter))) {
- dev_err(&dev->dev, "Couldn't register adapter!\n");
- release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
+ /* Check for auxiliary SMBus on some AMD chipsets */
+ if (dev->vendor == PCI_VENDOR_ID_ATI &&
+ dev->device == PCI_DEVICE_ID_ATI_SBX00_SMBUS &&
+ dev->revision < 0x40) {
+ retval = piix4_setup_aux(dev, id, 0x58);
+ if (retval > 0) {
+ /* Try to add the aux adapter if it exists,
+ * piix4_add_adapter will clean up if this fails */
+ piix4_add_adapter(dev, retval, &piix4_aux_adapter);
+ }
}
- return retval;
+ return 0;
+}
+
+static void __devexit piix4_adap_remove(struct i2c_adapter *adap)
+{
+ struct i2c_piix4_adapdata *adapdata = i2c_get_adapdata(adap);
+
+ if (adapdata->smba) {
+ i2c_del_adapter(adap);
+ release_region(adapdata->smba, SMBIOSIZE);
+ kfree(adapdata);
+ kfree(adap);
+ }
}
static void __devexit piix4_remove(struct pci_dev *dev)
{
- if (piix4_smba) {
- i2c_del_adapter(&piix4_adapter);
- release_region(piix4_smba, SMBIOSIZE);
- piix4_smba = 0;
+ if (piix4_main_adapter) {
+ piix4_adap_remove(piix4_main_adapter);
+ piix4_main_adapter = NULL;
+ }
+
+ if (piix4_aux_adapter) {
+ piix4_adap_remove(piix4_aux_adapter);
+ piix4_aux_adapter = NULL;
}
}
@@ -544,20 +658,9 @@ static struct pci_driver piix4_driver = {
.remove = __devexit_p(piix4_remove),
};
-static int __init i2c_piix4_init(void)
-{
- return pci_register_driver(&piix4_driver);
-}
-
-static void __exit i2c_piix4_exit(void)
-{
- pci_unregister_driver(&piix4_driver);
-}
+module_pci_driver(piix4_driver);
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("PIIX4 SMBus driver");
MODULE_LICENSE("GPL");
-
-module_init(i2c_piix4_init);
-module_exit(i2c_piix4_exit);
diff --git a/drivers/i2c/busses/i2c-pmcmsp.c b/drivers/i2c/busses/i2c-pmcmsp.c
index 07b7447ecbc9..3d71395ae1f7 100644
--- a/drivers/i2c/busses/i2c-pmcmsp.c
+++ b/drivers/i2c/busses/i2c-pmcmsp.c
@@ -306,8 +306,7 @@ static int __devinit pmcmsptwi_probe(struct platform_device *pldev)
pmcmsptwi_data.irq = platform_get_irq(pldev, 0);
if (pmcmsptwi_data.irq) {
rc = request_irq(pmcmsptwi_data.irq, &pmcmsptwi_interrupt,
- IRQF_SHARED | IRQF_SAMPLE_RANDOM,
- pldev->name, &pmcmsptwi_data);
+ IRQF_SHARED, pldev->name, &pmcmsptwi_data);
if (rc == 0) {
/*
* Enable 'DONE' interrupt only.
diff --git a/drivers/i2c/busses/i2c-pnx.c b/drivers/i2c/busses/i2c-pnx.c
index 99389d2eae51..5d54416770b0 100644
--- a/drivers/i2c/busses/i2c-pnx.c
+++ b/drivers/i2c/busses/i2c-pnx.c
@@ -587,25 +587,27 @@ static struct i2c_algorithm pnx_algorithm = {
};
#ifdef CONFIG_PM
-static int i2c_pnx_controller_suspend(struct platform_device *pdev,
- pm_message_t state)
+static int i2c_pnx_controller_suspend(struct device *dev)
{
- struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
+ struct i2c_pnx_algo_data *alg_data = dev_get_drvdata(dev);
clk_disable(alg_data->clk);
return 0;
}
-static int i2c_pnx_controller_resume(struct platform_device *pdev)
+static int i2c_pnx_controller_resume(struct device *dev)
{
- struct i2c_pnx_algo_data *alg_data = platform_get_drvdata(pdev);
+ struct i2c_pnx_algo_data *alg_data = dev_get_drvdata(dev);
return clk_enable(alg_data->clk);
}
+
+static SIMPLE_DEV_PM_OPS(i2c_pnx_pm,
+ i2c_pnx_controller_suspend, i2c_pnx_controller_resume);
+#define PNX_I2C_PM (&i2c_pnx_pm)
#else
-#define i2c_pnx_controller_suspend NULL
-#define i2c_pnx_controller_resume NULL
+#define PNX_I2C_PM NULL
#endif
static int __devinit i2c_pnx_probe(struct platform_device *pdev)
@@ -783,11 +785,10 @@ static struct platform_driver i2c_pnx_driver = {
.name = "pnx-i2c",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(i2c_pnx_of_match),
+ .pm = PNX_I2C_PM,
},
.probe = i2c_pnx_probe,
.remove = __devexit_p(i2c_pnx_remove),
- .suspend = i2c_pnx_controller_suspend,
- .resume = i2c_pnx_controller_resume,
};
static int __init i2c_adap_pnx_init(void)
diff --git a/drivers/i2c/busses/i2c-powermac.c b/drivers/i2c/busses/i2c-powermac.c
index 31c47e18d83c..5285f8565de4 100644
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@@ -227,28 +227,138 @@ static int __devexit i2c_powermac_remove(struct platform_device *dev)
return 0;
}
+static u32 __devinit i2c_powermac_get_addr(struct i2c_adapter *adap,
+ struct pmac_i2c_bus *bus,
+ struct device_node *node)
+{
+ const __be32 *prop;
+ int len;
+
+ /* First check for valid "reg" */
+ prop = of_get_property(node, "reg", &len);
+ if (prop && (len >= sizeof(int)))
+ return (be32_to_cpup(prop) & 0xff) >> 1;
+
+ /* Then check old-style "i2c-address" */
+ prop = of_get_property(node, "i2c-address", &len);
+ if (prop && (len >= sizeof(int)))
+ return (be32_to_cpup(prop) & 0xff) >> 1;
+
+ /* Now handle some devices with missing "reg" properties */
+ if (!strcmp(node->name, "cereal"))
+ return 0x60;
+ else if (!strcmp(node->name, "deq"))
+ return 0x34;
+
+ dev_warn(&adap->dev, "No i2c address for %s\n", node->full_name);
+
+ return 0xffffffff;
+}
+
+static void __devinit i2c_powermac_create_one(struct i2c_adapter *adap,
+ const char *type,
+ u32 addr)
+{
+ struct i2c_board_info info = {};
+ struct i2c_client *newdev;
+
+ strncpy(info.type, type, sizeof(info.type));
+ info.addr = addr;
+ newdev = i2c_new_device(adap, &info);
+ if (!newdev)
+ dev_err(&adap->dev,
+ "i2c-powermac: Failure to register missing %s\n",
+ type);
+}
+
+static void __devinit i2c_powermac_add_missing(struct i2c_adapter *adap,
+ struct pmac_i2c_bus *bus,
+ bool found_onyx)
+{
+ struct device_node *busnode = pmac_i2c_get_bus_node(bus);
+ int rc;
+
+ /* Check for the onyx audio codec */
+#define ONYX_REG_CONTROL 67
+ if (of_device_is_compatible(busnode, "k2-i2c") && !found_onyx) {
+ union i2c_smbus_data data;
+
+ rc = i2c_smbus_xfer(adap, 0x46, 0, I2C_SMBUS_READ,
+ ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA,
+ &data);
+ if (rc >= 0)
+ i2c_powermac_create_one(adap, "MAC,pcm3052", 0x46);
+
+ rc = i2c_smbus_xfer(adap, 0x47, 0, I2C_SMBUS_READ,
+ ONYX_REG_CONTROL, I2C_SMBUS_BYTE_DATA,
+ &data);
+ if (rc >= 0)
+ i2c_powermac_create_one(adap, "MAC,pcm3052", 0x47);
+ }
+}
+
+static bool __devinit i2c_powermac_get_type(struct i2c_adapter *adap,
+ struct device_node *node,
+ u32 addr, char *type, int type_size)
+{
+ char tmp[16];
+
+ /* Note: we to _NOT_ want the standard
+ * i2c drivers to match with any of our powermac stuff
+ * unless they have been specifically modified to handle
+ * it on a case by case basis. For example, for thermal
+ * control, things like lm75 etc... shall match with their
+ * corresponding windfarm drivers, _NOT_ the generic ones,
+ * so we force a prefix of AAPL, onto the modalias to
+ * make that happen
+ */
+
+ /* First try proper modalias */
+ if (of_modalias_node(node, tmp, sizeof(tmp)) >= 0) {
+ snprintf(type, type_size, "MAC,%s", tmp);
+ return true;
+ }
+
+ /* Now look for known workarounds */
+ if (!strcmp(node->name, "deq")) {
+ /* Apple uses address 0x34 for TAS3001 and 0x35 for TAS3004 */
+ if (addr == 0x34) {
+ snprintf(type, type_size, "MAC,tas3001");
+ return true;
+ } else if (addr == 0x35) {
+ snprintf(type, type_size, "MAC,tas3004");
+ return true;
+ }
+ }
+
+ dev_err(&adap->dev, "i2c-powermac: modalias failure"
+ " on %s\n", node->full_name);
+ return false;
+}
+
static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
struct pmac_i2c_bus *bus)
{
struct i2c_client *newdev;
struct device_node *node;
+ bool found_onyx = 0;
+
+ /*
+ * In some cases we end up with the via-pmu node itself, in this
+ * case we skip this function completely as the device-tree will
+ * not contain anything useful.
+ */
+ if (!strcmp(adap->dev.of_node->name, "via-pmu"))
+ return;
for_each_child_of_node(adap->dev.of_node, node) {
struct i2c_board_info info = {};
- struct dev_archdata dev_ad = {};
- const __be32 *reg;
- char tmp[16];
u32 addr;
- int len;
/* Get address & channel */
- reg = of_get_property(node, "reg", &len);
- if (!reg || (len < sizeof(int))) {
- dev_err(&adap->dev, "i2c-powermac: invalid reg on %s\n",
- node->full_name);
+ addr = i2c_powermac_get_addr(adap, bus, node);
+ if (addr == 0xffffffff)
continue;
- }
- addr = be32_to_cpup(reg);
/* Multibus setup, check channel */
if (!pmac_i2c_match_adapter(node, adap))
@@ -257,27 +367,23 @@ static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
dev_dbg(&adap->dev, "i2c-powermac: register %s\n",
node->full_name);
- /* Make up a modalias. Note: we to _NOT_ want the standard
- * i2c drivers to match with any of our powermac stuff
- * unless they have been specifically modified to handle
- * it on a case by case basis. For example, for thermal
- * control, things like lm75 etc... shall match with their
- * corresponding windfarm drivers, _NOT_ the generic ones,
- * so we force a prefix of AAPL, onto the modalias to
- * make that happen
+ /*
+ * Keep track of some device existence to handle
+ * workarounds later.
*/
- if (of_modalias_node(node, tmp, sizeof(tmp)) < 0) {
- dev_err(&adap->dev, "i2c-powermac: modalias failure"
- " on %s\n", node->full_name);
+ if (of_device_is_compatible(node, "pcm3052"))
+ found_onyx = true;
+
+ /* Make up a modalias */
+ if (!i2c_powermac_get_type(adap, node, addr,
+ info.type, sizeof(info.type))) {
continue;
}
- snprintf(info.type, sizeof(info.type), "MAC,%s", tmp);
/* Fill out the rest of the info structure */
- info.addr = (addr & 0xff) >> 1;
+ info.addr = addr;
info.irq = irq_of_parse_and_map(node, 0);
info.of_node = of_node_get(node);
- info.archdata = &dev_ad;
newdev = i2c_new_device(adap, &info);
if (!newdev) {
@@ -292,6 +398,9 @@ static void __devinit i2c_powermac_register_devices(struct i2c_adapter *adap,
continue;
}
}
+
+ /* Additional workarounds */
+ i2c_powermac_add_missing(adap, bus, found_onyx);
}
static int __devinit i2c_powermac_probe(struct platform_device *dev)
diff --git a/drivers/i2c/busses/i2c-puv3.c b/drivers/i2c/busses/i2c-puv3.c
index 93709fbe30eb..d8515be00b98 100644
--- a/drivers/i2c/busses/i2c-puv3.c
+++ b/drivers/i2c/busses/i2c-puv3.c
@@ -254,7 +254,7 @@ static int __devexit puv3_i2c_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
-static int puv3_i2c_suspend(struct platform_device *dev, pm_message_t state)
+static int puv3_i2c_suspend(struct device *dev)
{
int poll_count;
/* Disable the IIC */
@@ -267,23 +267,20 @@ static int puv3_i2c_suspend(struct platform_device *dev, pm_message_t state)
return 0;
}
-static int puv3_i2c_resume(struct platform_device *dev)
-{
- return 0 ;
-}
+static SIMPLE_DEV_PM_OPS(puv3_i2c_pm, puv3_i2c_suspend, NULL);
+#define PUV3_I2C_PM (&puv3_i2c_pm)
+
#else
-#define puv3_i2c_suspend NULL
-#define puv3_i2c_resume NULL
+#define PUV3_I2C_PM NULL
#endif
static struct platform_driver puv3_i2c_driver = {
.probe = puv3_i2c_probe,
.remove = __devexit_p(puv3_i2c_remove),
- .suspend = puv3_i2c_suspend,
- .resume = puv3_i2c_resume,
.driver = {
.name = "PKUnity-v3-I2C",
.owner = THIS_MODULE,
+ .pm = PUV3_I2C_PM,
}
};
diff --git a/drivers/i2c/busses/i2c-pxa-pci.c b/drivers/i2c/busses/i2c-pxa-pci.c
index a05817980556..4dc9bef17d77 100644
--- a/drivers/i2c/busses/i2c-pxa-pci.c
+++ b/drivers/i2c/busses/i2c-pxa-pci.c
@@ -163,17 +163,7 @@ static struct pci_driver ce4100_i2c_driver = {
.remove = __devexit_p(ce4100_i2c_remove),
};
-static int __init ce4100_i2c_init(void)
-{
- return pci_register_driver(&ce4100_i2c_driver);
-}
-module_init(ce4100_i2c_init);
-
-static void __exit ce4100_i2c_exit(void)
-{
- pci_unregister_driver(&ce4100_i2c_driver);
-}
-module_exit(ce4100_i2c_exit);
+module_pci_driver(ce4100_i2c_driver);
MODULE_DESCRIPTION("CE4100 PCI-I2C glue code for PXA's driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index a997c7d3f95d..1034d93fb838 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -41,13 +41,6 @@
#include <asm/irq.h>
-#ifndef CONFIG_HAVE_CLK
-#define clk_get(dev, id) NULL
-#define clk_put(clk) do { } while (0)
-#define clk_disable(clk) do { } while (0)
-#define clk_enable(clk) do { } while (0)
-#endif
-
struct pxa_reg_layout {
u32 ibmr;
u32 idbr;
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 01959154572d..5ae3b0236bd3 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -122,7 +122,7 @@ static inline unsigned int s3c24xx_get_device_quirks(struct platform_device *pde
{
if (pdev->dev.of_node) {
const struct of_device_id *match;
- match = of_match_node(&s3c24xx_i2c_match, pdev->dev.of_node);
+ match = of_match_node(s3c24xx_i2c_match, pdev->dev.of_node);
return (unsigned int)match->data;
}
@@ -609,7 +609,7 @@ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
if (ret != -EAGAIN) {
clk_disable(i2c->clk);
- pm_runtime_put_sync(&adap->dev);
+ pm_runtime_put(&adap->dev);
return ret;
}
@@ -619,7 +619,7 @@ static int s3c24xx_i2c_xfer(struct i2c_adapter *adap,
}
clk_disable(i2c->clk);
- pm_runtime_put_sync(&adap->dev);
+ pm_runtime_put(&adap->dev);
return -EREMOTEIO;
}
diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index 15cf78f65ce0..5d6723b7525e 100644
--- a/drivers/i2c/busses/i2c-sis630.c
+++ b/drivers/i2c/busses/i2c-sis630.c
@@ -513,21 +513,8 @@ static struct pci_driver sis630_driver = {
.remove = __devexit_p(sis630_remove),
};
-static int __init i2c_sis630_init(void)
-{
- return pci_register_driver(&sis630_driver);
-}
-
-
-static void __exit i2c_sis630_exit(void)
-{
- pci_unregister_driver(&sis630_driver);
-}
-
+module_pci_driver(sis630_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexander Malysh <amalysh@web.de>");
MODULE_DESCRIPTION("SIS630 SMBus driver");
-
-module_init(i2c_sis630_init);
-module_exit(i2c_sis630_exit);
diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index cc5d149413f7..7b72614a9bc0 100644
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -324,21 +324,8 @@ static struct pci_driver sis96x_driver = {
.remove = __devexit_p(sis96x_remove),
};
-static int __init i2c_sis96x_init(void)
-{
- return pci_register_driver(&sis96x_driver);
-}
-
-static void __exit i2c_sis96x_exit(void)
-{
- pci_unregister_driver(&sis96x_driver);
-}
+module_pci_driver(sis96x_driver);
MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
MODULE_DESCRIPTION("SiS96x SMBus driver");
MODULE_LICENSE("GPL");
-
-/* Register initialization functions using helper macros */
-module_init(i2c_sis96x_init);
-module_exit(i2c_sis96x_exit);
-
diff --git a/drivers/i2c/busses/i2c-stu300.c b/drivers/i2c/busses/i2c-stu300.c
index 4d44af181f37..580a0c04cb42 100644
--- a/drivers/i2c/busses/i2c-stu300.c
+++ b/drivers/i2c/busses/i2c-stu300.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2007-2009 ST-Ericsson AB
+ * Copyright (C) 2007-2012 ST-Ericsson AB
* License terms: GNU General Public License (GPL) version 2
* ST DDC I2C master mode driver, used in e.g. U300 series platforms.
* Author: Linus Walleij <linus.walleij@stericsson.com>
@@ -139,8 +139,6 @@ module_param(scl_frequency, uint, 0644);
* struct stu300_dev - the stu300 driver state holder
* @pdev: parent platform device
* @adapter: corresponding I2C adapter
- * @phybase: location of I/O area in memory
- * @physize: size of I/O area in memory
* @clk: hardware block clock
* @irq: assigned interrupt line
* @cmd_issue_lock: this locks the following cmd_ variables
@@ -155,8 +153,6 @@ module_param(scl_frequency, uint, 0644);
struct stu300_dev {
struct platform_device *pdev;
struct i2c_adapter adapter;
- resource_size_t phybase;
- resource_size_t physize;
void __iomem *virtbase;
struct clk *clk;
int irq;
@@ -873,64 +869,44 @@ stu300_probe(struct platform_device *pdev)
int ret = 0;
char clk_name[] = "I2C0";
- dev = kzalloc(sizeof(struct stu300_dev), GFP_KERNEL);
+ dev = devm_kzalloc(&pdev->dev, sizeof(struct stu300_dev), GFP_KERNEL);
if (!dev) {
dev_err(&pdev->dev, "could not allocate device struct\n");
- ret = -ENOMEM;
- goto err_no_devmem;
+ return -ENOMEM;
}
bus_nr = pdev->id;
clk_name[3] += (char)bus_nr;
- dev->clk = clk_get(&pdev->dev, clk_name);
+ dev->clk = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(dev->clk)) {
- ret = PTR_ERR(dev->clk);
dev_err(&pdev->dev, "could not retrieve i2c bus clock\n");
- goto err_no_clk;
+ return PTR_ERR(dev->clk);
}
dev->pdev = pdev;
- platform_set_drvdata(pdev, dev);
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENOENT;
- goto err_no_resource;
- }
-
- dev->phybase = res->start;
- dev->physize = resource_size(res);
-
- if (request_mem_region(dev->phybase, dev->physize,
- NAME " I/O Area") == NULL) {
- ret = -EBUSY;
- goto err_no_ioregion;
- }
+ if (!res)
+ return -ENOENT;
- dev->virtbase = ioremap(dev->phybase, dev->physize);
+ dev->virtbase = devm_request_and_ioremap(&pdev->dev, res);
dev_dbg(&pdev->dev, "initialize bus device I2C%d on virtual "
"base %p\n", bus_nr, dev->virtbase);
- if (!dev->virtbase) {
- ret = -ENOMEM;
- goto err_no_ioremap;
- }
+ if (!dev->virtbase)
+ return -ENOMEM;
dev->irq = platform_get_irq(pdev, 0);
- if (request_irq(dev->irq, stu300_irh, 0,
- NAME, dev)) {
- ret = -EIO;
- goto err_no_irq;
- }
+ ret = devm_request_irq(&pdev->dev, dev->irq, stu300_irh, 0, NAME, dev);
+ if (ret < 0)
+ return ret;
dev->speed = scl_frequency;
- clk_enable(dev->clk);
+ clk_prepare_enable(dev->clk);
ret = stu300_init_hw(dev);
clk_disable(dev->clk);
-
if (ret != 0) {
dev_err(&dev->pdev->dev, "error initializing hardware.\n");
- goto err_init_hw;
+ return -EIO;
}
/* IRQ event handling initialization */
@@ -952,57 +928,43 @@ stu300_probe(struct platform_device *pdev)
/* i2c device drivers may be active on return from add_adapter() */
ret = i2c_add_numbered_adapter(adap);
if (ret) {
- dev_err(&dev->pdev->dev, "failure adding ST Micro DDC "
+ dev_err(&pdev->dev, "failure adding ST Micro DDC "
"I2C adapter\n");
- goto err_add_adapter;
+ return ret;
}
- return 0;
- err_add_adapter:
- err_init_hw:
- free_irq(dev->irq, dev);
- err_no_irq:
- iounmap(dev->virtbase);
- err_no_ioremap:
- release_mem_region(dev->phybase, dev->physize);
- err_no_ioregion:
- platform_set_drvdata(pdev, NULL);
- err_no_resource:
- clk_put(dev->clk);
- err_no_clk:
- kfree(dev);
- err_no_devmem:
- dev_err(&pdev->dev, "failed to add " NAME " adapter: %d\n",
- pdev->id);
- return ret;
+ platform_set_drvdata(pdev, dev);
+ return 0;
}
#ifdef CONFIG_PM
-static int stu300_suspend(struct platform_device *pdev, pm_message_t state)
+static int stu300_suspend(struct device *device)
{
- struct stu300_dev *dev = platform_get_drvdata(pdev);
+ struct stu300_dev *dev = dev_get_drvdata(device);
/* Turn off everything */
stu300_wr8(0x00, dev->virtbase + I2C_CR);
return 0;
}
-static int stu300_resume(struct platform_device *pdev)
+static int stu300_resume(struct device *device)
{
int ret = 0;
- struct stu300_dev *dev = platform_get_drvdata(pdev);
+ struct stu300_dev *dev = dev_get_drvdata(device);
clk_enable(dev->clk);
ret = stu300_init_hw(dev);
clk_disable(dev->clk);
if (ret != 0)
- dev_err(&pdev->dev, "error re-initializing hardware.\n");
+ dev_err(device, "error re-initializing hardware.\n");
return ret;
}
+
+static SIMPLE_DEV_PM_OPS(stu300_pm, stu300_suspend, stu300_resume);
+#define STU300_I2C_PM (&stu300_pm)
#else
-#define stu300_suspend NULL
-#define stu300_resume NULL
+#define STU300_I2C_PM NULL
#endif
static int __exit
@@ -1013,12 +975,7 @@ stu300_remove(struct platform_device *pdev)
i2c_del_adapter(&dev->adapter);
/* Turn off everything */
stu300_wr8(0x00, dev->virtbase + I2C_CR);
- free_irq(dev->irq, dev);
- iounmap(dev->virtbase);
- release_mem_region(dev->phybase, dev->physize);
- clk_put(dev->clk);
platform_set_drvdata(pdev, NULL);
- kfree(dev);
return 0;
}
@@ -1026,10 +983,9 @@ static struct platform_driver stu300_i2c_driver = {
.driver = {
.name = NAME,
.owner = THIS_MODULE,
+ .pm = STU300_I2C_PM,
},
.remove = __exit_p(stu300_remove),
- .suspend = stu300_suspend,
- .resume = stu300_resume,
};
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 8b2e555a9563..9a08c57bc936 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -97,8 +97,21 @@
#define I2C_HEADER_10BIT_ADDR (1<<18)
#define I2C_HEADER_IE_ENABLE (1<<17)
#define I2C_HEADER_REPEAT_START (1<<16)
+#define I2C_HEADER_CONTINUE_XFER (1<<15)
#define I2C_HEADER_MASTER_ADDR_SHIFT 12
#define I2C_HEADER_SLAVE_ADDR_SHIFT 1
+/*
+ * msg_end_type: The bus control which need to be send at end of transfer.
+ * @MSG_END_STOP: Send stop pulse at end of transfer.
+ * @MSG_END_REPEAT_START: Send repeat start at end of transfer.
+ * @MSG_END_CONTINUE: The following on message is coming and so do not send
+ * stop or repeat start.
+ */
+enum msg_end_type {
+ MSG_END_STOP,
+ MSG_END_REPEAT_START,
+ MSG_END_CONTINUE,
+};
/**
* struct tegra_i2c_dev - per device i2c context
@@ -106,7 +119,6 @@
* @adapter: core i2c layer adapter information
* @clk: clock reference for i2c controller
* @i2c_clk: clock reference for i2c bus
- * @iomem: memory resource for registers
* @base: ioremapped registers cookie
* @cont_id: i2c controller id, used for for packet header
* @irq: irq number of transfer complete interrupt
@@ -124,7 +136,6 @@ struct tegra_i2c_dev {
struct i2c_adapter adapter;
struct clk *clk;
struct clk *i2c_clk;
- struct resource *iomem;
void __iomem *base;
int cont_id;
int irq;
@@ -165,6 +176,10 @@ static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val,
unsigned long reg)
{
writel(val, i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
+
+ /* Read back register to make sure that register writes completed */
+ if (reg != I2C_TX_FIFO)
+ readl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg));
}
static u32 i2c_readl(struct tegra_i2c_dev *i2c_dev, unsigned long reg)
@@ -341,7 +356,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
u32 val;
int err = 0;
- clk_enable(i2c_dev->clk);
+ clk_prepare_enable(i2c_dev->clk);
tegra_periph_reset_assert(i2c_dev->clk);
udelay(2);
@@ -372,7 +387,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
if (tegra_i2c_flush_fifos(i2c_dev))
err = -ETIMEDOUT;
- clk_disable(i2c_dev->clk);
+ clk_disable_unprepare(i2c_dev->clk);
if (i2c_dev->irq_disabled) {
i2c_dev->irq_disabled = 0;
@@ -449,7 +464,7 @@ err:
}
static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
- struct i2c_msg *msg, int stop)
+ struct i2c_msg *msg, enum msg_end_type end_state)
{
u32 packet_header;
u32 int_mask;
@@ -476,7 +491,9 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO);
packet_header = I2C_HEADER_IE_ENABLE;
- if (!stop)
+ if (end_state == MSG_END_CONTINUE)
+ packet_header |= I2C_HEADER_CONTINUE_XFER;
+ else if (end_state == MSG_END_REPEAT_START)
packet_header |= I2C_HEADER_REPEAT_START;
if (msg->flags & I2C_M_TEN) {
packet_header |= msg->addr;
@@ -546,20 +563,27 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
if (i2c_dev->is_suspended)
return -EBUSY;
- clk_enable(i2c_dev->clk);
+ clk_prepare_enable(i2c_dev->clk);
for (i = 0; i < num; i++) {
- int stop = (i == (num - 1)) ? 1 : 0;
- ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], stop);
+ enum msg_end_type end_type = MSG_END_STOP;
+ if (i < (num - 1)) {
+ if (msgs[i + 1].flags & I2C_M_NOSTART)
+ end_type = MSG_END_CONTINUE;
+ else
+ end_type = MSG_END_REPEAT_START;
+ }
+ ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], end_type);
if (ret)
break;
}
- clk_disable(i2c_dev->clk);
+ clk_disable_unprepare(i2c_dev->clk);
return ret ?: i;
}
static u32 tegra_i2c_func(struct i2c_adapter *adap)
{
- return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR;
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR |
+ I2C_FUNC_PROTOCOL_MANGLING | I2C_FUNC_NOSTART;
}
static const struct i2c_algorithm tegra_i2c_algo = {
@@ -572,7 +596,6 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
struct tegra_i2c_dev *i2c_dev;
struct tegra_i2c_platform_data *pdata = pdev->dev.platform_data;
struct resource *res;
- struct resource *iomem;
struct clk *clk;
struct clk *i2c_clk;
const unsigned int *prop;
@@ -585,50 +608,41 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "no mem resource\n");
return -EINVAL;
}
- iomem = request_mem_region(res->start, resource_size(res), pdev->name);
- if (!iomem) {
- dev_err(&pdev->dev, "I2C region already claimed\n");
- return -EBUSY;
- }
- base = ioremap(iomem->start, resource_size(iomem));
+ base = devm_request_and_ioremap(&pdev->dev, res);
if (!base) {
- dev_err(&pdev->dev, "Cannot ioremap I2C region\n");
- return -ENOMEM;
+ dev_err(&pdev->dev, "Cannot request/ioremap I2C registers\n");
+ return -EADDRNOTAVAIL;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(&pdev->dev, "no irq resource\n");
- ret = -EINVAL;
- goto err_iounmap;
+ return -EINVAL;
}
irq = res->start;
- clk = clk_get(&pdev->dev, NULL);
+ clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
dev_err(&pdev->dev, "missing controller clock");
- ret = PTR_ERR(clk);
- goto err_release_region;
+ return PTR_ERR(clk);
}
- i2c_clk = clk_get(&pdev->dev, "i2c");
+ i2c_clk = devm_clk_get(&pdev->dev, "i2c");
if (IS_ERR(i2c_clk)) {
dev_err(&pdev->dev, "missing bus clock");
- ret = PTR_ERR(i2c_clk);
- goto err_clk_put;
+ return PTR_ERR(i2c_clk);
}
- i2c_dev = kzalloc(sizeof(struct tegra_i2c_dev), GFP_KERNEL);
+ i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL);
if (!i2c_dev) {
- ret = -ENOMEM;
- goto err_i2c_clk_put;
+ dev_err(&pdev->dev, "Could not allocate struct tegra_i2c_dev");
+ return -ENOMEM;
}
i2c_dev->base = base;
i2c_dev->clk = clk;
i2c_dev->i2c_clk = i2c_clk;
- i2c_dev->iomem = iomem;
i2c_dev->adapter.algo = &tegra_i2c_algo;
i2c_dev->irq = irq;
i2c_dev->cont_id = pdev->id;
@@ -657,16 +671,17 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
ret = tegra_i2c_init(i2c_dev);
if (ret) {
dev_err(&pdev->dev, "Failed to initialize i2c controller");
- goto err_free;
+ return ret;
}
- ret = request_irq(i2c_dev->irq, tegra_i2c_isr, 0, pdev->name, i2c_dev);
+ ret = devm_request_irq(&pdev->dev, i2c_dev->irq,
+ tegra_i2c_isr, 0, pdev->name, i2c_dev);
if (ret) {
dev_err(&pdev->dev, "Failed to request irq %i\n", i2c_dev->irq);
- goto err_free;
+ return ret;
}
- clk_enable(i2c_dev->i2c_clk);
+ clk_prepare_enable(i2c_dev->i2c_clk);
i2c_set_adapdata(&i2c_dev->adapter, i2c_dev);
i2c_dev->adapter.owner = THIS_MODULE;
@@ -681,45 +696,26 @@ static int __devinit tegra_i2c_probe(struct platform_device *pdev)
ret = i2c_add_numbered_adapter(&i2c_dev->adapter);
if (ret) {
dev_err(&pdev->dev, "Failed to add I2C adapter\n");
- goto err_free_irq;
+ clk_disable_unprepare(i2c_dev->i2c_clk);
+ return ret;
}
of_i2c_register_devices(&i2c_dev->adapter);
return 0;
-err_free_irq:
- free_irq(i2c_dev->irq, i2c_dev);
-err_free:
- kfree(i2c_dev);
-err_i2c_clk_put:
- clk_put(i2c_clk);
-err_clk_put:
- clk_put(clk);
-err_release_region:
- release_mem_region(iomem->start, resource_size(iomem));
-err_iounmap:
- iounmap(base);
- return ret;
}
static int __devexit tegra_i2c_remove(struct platform_device *pdev)
{
struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
i2c_del_adapter(&i2c_dev->adapter);
- free_irq(i2c_dev->irq, i2c_dev);
- clk_put(i2c_dev->i2c_clk);
- clk_put(i2c_dev->clk);
- release_mem_region(i2c_dev->iomem->start,
- resource_size(i2c_dev->iomem));
- iounmap(i2c_dev->base);
- kfree(i2c_dev);
return 0;
}
-#ifdef CONFIG_PM
-static int tegra_i2c_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int tegra_i2c_suspend(struct device *dev)
{
- struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
+ struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
i2c_lock_adapter(&i2c_dev->adapter);
i2c_dev->is_suspended = true;
@@ -728,9 +724,9 @@ static int tegra_i2c_suspend(struct platform_device *pdev, pm_message_t state)
return 0;
}
-static int tegra_i2c_resume(struct platform_device *pdev)
+static int tegra_i2c_resume(struct device *dev)
{
- struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev);
+ struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
int ret;
i2c_lock_adapter(&i2c_dev->adapter);
@@ -748,6 +744,11 @@ static int tegra_i2c_resume(struct platform_device *pdev)
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(tegra_i2c_pm, tegra_i2c_suspend, tegra_i2c_resume);
+#define TEGRA_I2C_PM (&tegra_i2c_pm)
+#else
+#define TEGRA_I2C_PM NULL
#endif
#if defined(CONFIG_OF)
@@ -758,21 +759,16 @@ static const struct of_device_id tegra_i2c_of_match[] __devinitconst = {
{},
};
MODULE_DEVICE_TABLE(of, tegra_i2c_of_match);
-#else
-#define tegra_i2c_of_match NULL
#endif
static struct platform_driver tegra_i2c_driver = {
.probe = tegra_i2c_probe,
.remove = __devexit_p(tegra_i2c_remove),
-#ifdef CONFIG_PM
- .suspend = tegra_i2c_suspend,
- .resume = tegra_i2c_resume,
-#endif
.driver = {
.name = "tegra-i2c",
.owner = THIS_MODULE,
- .of_match_table = tegra_i2c_of_match,
+ .of_match_table = of_match_ptr(tegra_i2c_of_match),
+ .pm = TEGRA_I2C_PM,
},
};
diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c
index f07307ff360d..05106368d405 100644
--- a/drivers/i2c/busses/i2c-tiny-usb.c
+++ b/drivers/i2c/busses/i2c-tiny-usb.c
@@ -143,6 +143,7 @@ static const struct i2c_algorithm usb_algorithm = {
static const struct usb_device_id i2c_tiny_usb_table[] = {
{ USB_DEVICE(0x0403, 0xc631) }, /* FTDI */
{ USB_DEVICE(0x1c40, 0x0534) }, /* EZPrototypes */
+ { USB_DEVICE(0x1964, 0x0001) }, /* Robofuzz OSIF */
{ } /* Terminating entry */
};
diff --git a/drivers/i2c/busses/i2c-via.c b/drivers/i2c/busses/i2c-via.c
index 713d31ade26b..7ffee71ca190 100644
--- a/drivers/i2c/busses/i2c-via.c
+++ b/drivers/i2c/busses/i2c-via.c
@@ -161,20 +161,8 @@ static struct pci_driver vt586b_driver = {
.remove = __devexit_p(vt586b_remove),
};
-static int __init i2c_vt586b_init(void)
-{
- return pci_register_driver(&vt586b_driver);
-}
-
-static void __exit i2c_vt586b_exit(void)
-{
- pci_unregister_driver(&vt586b_driver);
-}
-
+module_pci_driver(vt586b_driver);
MODULE_AUTHOR("Kyösti Mälkki <kmalkki@cc.hut.fi>");
MODULE_DESCRIPTION("i2c for Via vt82c586b southbridge");
MODULE_LICENSE("GPL");
-
-module_init(i2c_vt586b_init);
-module_exit(i2c_vt586b_exit);
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index a6ad32bc0a96..2efa56c5ff2c 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1312,6 +1312,37 @@ module_exit(i2c_exit);
*/
/**
+ * __i2c_transfer - unlocked flavor of i2c_transfer
+ * @adap: Handle to I2C bus
+ * @msgs: One or more messages to execute before STOP is issued to
+ * terminate the operation; each message begins with a START.
+ * @num: Number of messages to be executed.
+ *
+ * Returns negative errno, else the number of messages executed.
+ *
+ * Adapter lock must be held when calling this function. No debug logging
+ * takes place. adap->algo->master_xfer existence isn't checked.
+ */
+int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+ unsigned long orig_jiffies;
+ int ret, try;
+
+ /* Retry automatically on arbitration loss */
+ orig_jiffies = jiffies;
+ for (ret = 0, try = 0; try <= adap->retries; try++) {
+ ret = adap->algo->master_xfer(adap, msgs, num);
+ if (ret != -EAGAIN)
+ break;
+ if (time_after(jiffies, orig_jiffies + adap->timeout))
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(__i2c_transfer);
+
+/**
* i2c_transfer - execute a single or combined I2C message
* @adap: Handle to I2C bus
* @msgs: One or more messages to execute before STOP is issued to
@@ -1325,8 +1356,7 @@ module_exit(i2c_exit);
*/
int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
- unsigned long orig_jiffies;
- int ret, try;
+ int ret;
/* REVISIT the fault reporting model here is weak:
*
@@ -1364,15 +1394,7 @@ int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
i2c_lock_adapter(adap);
}
- /* Retry automatically on arbitration loss */
- orig_jiffies = jiffies;
- for (ret = 0, try = 0; try <= adap->retries; try++) {
- ret = adap->algo->master_xfer(adap, msgs, num);
- if (ret != -EAGAIN)
- break;
- if (time_after(jiffies, orig_jiffies + adap->timeout))
- break;
- }
+ ret = __i2c_transfer(adap, msgs, num);
i2c_unlock_adapter(adap);
return ret;
@@ -2122,7 +2144,7 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
int try;
s32 res;
- flags &= I2C_M_TEN | I2C_CLIENT_PEC;
+ flags &= I2C_M_TEN | I2C_CLIENT_PEC | I2C_CLIENT_SCCB;
if (adapter->algo->smbus_xfer) {
i2c_lock_adapter(adapter);
@@ -2140,11 +2162,17 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags,
break;
}
i2c_unlock_adapter(adapter);
- } else
- res = i2c_smbus_xfer_emulated(adapter, addr, flags, read_write,
- command, protocol, data);
- return res;
+ if (res != -EOPNOTSUPP || !adapter->algo->master_xfer)
+ return res;
+ /*
+ * Fall back to i2c_smbus_xfer_emulated if the adapter doesn't
+ * implement native support for the SMBus operation.
+ */
+ }
+
+ return i2c_smbus_xfer_emulated(adapter, addr, flags, read_write,
+ command, protocol, data);
}
EXPORT_SYMBOL(i2c_smbus_xfer);
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c
index 9836d08f7a77..df3e0bf31eb3 100644
--- a/drivers/i2c/i2c-smbus.c
+++ b/drivers/i2c/i2c-smbus.c
@@ -245,18 +245,7 @@ int i2c_handle_smbus_alert(struct i2c_client *ara)
}
EXPORT_SYMBOL_GPL(i2c_handle_smbus_alert);
-static int __init i2c_smbus_init(void)
-{
- return i2c_add_driver(&smbalert_driver);
-}
-
-static void __exit i2c_smbus_exit(void)
-{
- i2c_del_driver(&smbalert_driver);
-}
-
-module_init(i2c_smbus_init);
-module_exit(i2c_smbus_exit);
+module_i2c_driver(smbalert_driver);
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
MODULE_DESCRIPTION("SMBus protocol extensions support");
diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c
index 8aacde1516ac..f8f72f39e0b5 100644
--- a/drivers/i2c/muxes/i2c-mux-pca9541.c
+++ b/drivers/i2c/muxes/i2c-mux-pca9541.c
@@ -396,6 +396,6 @@ static struct i2c_driver pca9541_driver = {
module_i2c_driver(pca9541_driver);
-MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
+MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
MODULE_DESCRIPTION("PCA9541 I2C master selector driver");
MODULE_LICENSE("GPL v2");