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-rw-r--r--Documentation/i2c/busses/i2c-viapro8
-rw-r--r--Documentation/i2c/dev-interface110
-rw-r--r--Documentation/i2c/smbus-protocol4
-rw-r--r--Documentation/i2c/writing-clients4
-rw-r--r--arch/arm/mach-omap1/board-h3.c4
-rw-r--r--arch/arm/mach-omap2/board-h4.c11
-rw-r--r--drivers/hwmon/dme1737.c320
-rw-r--r--drivers/i2c/busses/Kconfig20
-rw-r--r--drivers/i2c/busses/Makefile1
-rw-r--r--drivers/i2c/busses/i2c-highlander.c498
-rw-r--r--drivers/i2c/busses/i2c-parport-light.c39
-rw-r--r--drivers/i2c/busses/i2c-pca-isa.c20
-rw-r--r--drivers/i2c/busses/i2c-viapro.c17
-rw-r--r--drivers/i2c/chips/isp1301_omap.c141
-rw-r--r--drivers/i2c/chips/tps65010.c12
-rw-r--r--drivers/i2c/i2c-core.c35
16 files changed, 918 insertions, 326 deletions
diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro
index 1405fb69984c..22efedf60c87 100644
--- a/Documentation/i2c/busses/i2c-viapro
+++ b/Documentation/i2c/busses/i2c-viapro
@@ -16,6 +16,9 @@ Supported adapters:
* VIA Technologies, Inc. CX700
Datasheet: available on request and under NDA from VIA
+ * VIA Technologies, Inc. VX800/VX820
+ Datasheet: available on http://linux.via.com.tw
+
Authors:
Kyösti Mälkki <kmalkki@cc.hut.fi>,
Mark D. Studebaker <mdsxyz123@yahoo.com>,
@@ -49,6 +52,7 @@ Your lspci -n listing must show one of these :
device 1106:3372 (VT8237S)
device 1106:3287 (VT8251)
device 1106:8324 (CX700)
+ device 1106:8353 (VX800/VX820)
If none of these show up, you should look in the BIOS for settings like
enable ACPI / SMBus or even USB.
@@ -57,5 +61,5 @@ Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
VT8231), this driver supports I2C block transactions. Such transactions
are mainly useful to read from and write to EEPROMs.
-The CX700 additionally appears to support SMBus PEC, although this driver
-doesn't implement it yet.
+The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
+this driver doesn't implement it yet.
diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface
index 9dd79123ddd9..3e742ba25536 100644
--- a/Documentation/i2c/dev-interface
+++ b/Documentation/i2c/dev-interface
@@ -4,6 +4,10 @@ the /dev interface. You need to load module i2c-dev for this.
Each registered i2c adapter gets a number, counting from 0. You can
examine /sys/class/i2c-dev/ to see what number corresponds to which adapter.
+Alternatively, you can run "i2cdetect -l" to obtain a formated list of all
+i2c adapters present on your system at a given time. i2cdetect is part of
+the i2c-tools package.
+
I2C device files are character device files with major device number 89
and a minor device number corresponding to the number assigned as
explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ...,
@@ -17,30 +21,34 @@ So let's say you want to access an i2c adapter from a C program. The
first thing to do is "#include <linux/i2c-dev.h>". Please note that
there are two files named "i2c-dev.h" out there, one is distributed
with the Linux kernel and is meant to be included from kernel
-driver code, the other one is distributed with lm_sensors and is
+driver code, the other one is distributed with i2c-tools and is
meant to be included from user-space programs. You obviously want
the second one here.
Now, you have to decide which adapter you want to access. You should
-inspect /sys/class/i2c-dev/ to decide this. Adapter numbers are assigned
-somewhat dynamically, so you can not even assume /dev/i2c-0 is the
-first adapter.
+inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this.
+Adapter numbers are assigned somewhat dynamically, so you can not
+assume much about them. They can even change from one boot to the next.
Next thing, open the device file, as follows:
+
int file;
int adapter_nr = 2; /* probably dynamically determined */
char filename[20];
- sprintf(filename,"/dev/i2c-%d",adapter_nr);
- if ((file = open(filename,O_RDWR)) < 0) {
+ snprintf(filename, 19, "/dev/i2c-%d", adapter_nr);
+ file = open(filename, O_RDWR);
+ if (file < 0) {
/* ERROR HANDLING; you can check errno to see what went wrong */
exit(1);
}
When you have opened the device, you must specify with what device
address you want to communicate:
+
int addr = 0x40; /* The I2C address */
- if (ioctl(file,I2C_SLAVE,addr) < 0) {
+
+ if (ioctl(file, I2C_SLAVE, addr) < 0) {
/* ERROR HANDLING; you can check errno to see what went wrong */
exit(1);
}
@@ -48,31 +56,41 @@ address you want to communicate:
Well, you are all set up now. You can now use SMBus commands or plain
I2C to communicate with your device. SMBus commands are preferred if
the device supports them. Both are illustrated below.
+
__u8 register = 0x10; /* Device register to access */
__s32 res;
char buf[10];
+
/* Using SMBus commands */
- res = i2c_smbus_read_word_data(file,register);
+ res = i2c_smbus_read_word_data(file, register);
if (res < 0) {
/* ERROR HANDLING: i2c transaction failed */
} else {
/* res contains the read word */
}
+
/* Using I2C Write, equivalent of
- i2c_smbus_write_word_data(file,register,0x6543) */
+ i2c_smbus_write_word_data(file, register, 0x6543) */
buf[0] = register;
buf[1] = 0x43;
buf[2] = 0x65;
- if ( write(file,buf,3) != 3) {
+ if (write(file, buf, 3) ! =3) {
/* ERROR HANDLING: i2c transaction failed */
}
+
/* Using I2C Read, equivalent of i2c_smbus_read_byte(file) */
- if (read(file,buf,1) != 1) {
+ if (read(file, buf, 1) != 1) {
/* ERROR HANDLING: i2c transaction failed */
} else {
/* buf[0] contains the read byte */
}
+Note that only a subset of the I2C and SMBus protocols can be achieved by
+the means of read() and write() calls. In particular, so-called combined
+transactions (mixing read and write messages in the same transaction)
+aren't supported. For this reason, this interface is almost never used by
+user-space programs.
+
IMPORTANT: because of the use of inline functions, you *have* to use
'-O' or some variation when you compile your program!
@@ -80,31 +98,29 @@ IMPORTANT: because of the use of inline functions, you *have* to use
Full interface description
==========================
-The following IOCTLs are defined and fully supported
-(see also i2c-dev.h):
+The following IOCTLs are defined:
-ioctl(file,I2C_SLAVE,long addr)
+ioctl(file, I2C_SLAVE, long addr)
Change slave address. The address is passed in the 7 lower bits of the
argument (except for 10 bit addresses, passed in the 10 lower bits in this
case).
-ioctl(file,I2C_TENBIT,long select)
+ioctl(file, I2C_TENBIT, long select)
Selects ten bit addresses if select not equals 0, selects normal 7 bit
addresses if select equals 0. Default 0. This request is only valid
if the adapter has I2C_FUNC_10BIT_ADDR.
-ioctl(file,I2C_PEC,long select)
+ioctl(file, I2C_PEC, long select)
Selects SMBus PEC (packet error checking) generation and verification
if select not equals 0, disables if select equals 0. Default 0.
Used only for SMBus transactions. This request only has an effect if the
the adapter has I2C_FUNC_SMBUS_PEC; it is still safe if not, it just
doesn't have any effect.
-ioctl(file,I2C_FUNCS,unsigned long *funcs)
+ioctl(file, I2C_FUNCS, unsigned long *funcs)
Gets the adapter functionality and puts it in *funcs.
-ioctl(file,I2C_RDWR,struct i2c_rdwr_ioctl_data *msgset)
-
+ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset)
Do combined read/write transaction without stop in between.
Only valid if the adapter has I2C_FUNC_I2C. The argument is
a pointer to a
@@ -120,10 +136,9 @@ ioctl(file,I2C_RDWR,struct i2c_rdwr_ioctl_data *msgset)
The slave address and whether to use ten bit address mode has to be
set in each message, overriding the values set with the above ioctl's.
-
-Other values are NOT supported at this moment, except for I2C_SMBUS,
-which you should never directly call; instead, use the access functions
-below.
+ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args)
+ Not meant to be called directly; instead, use the access functions
+ below.
You can do plain i2c transactions by using read(2) and write(2) calls.
You do not need to pass the address byte; instead, set it through
@@ -148,7 +163,52 @@ what happened. The 'write' transactions return 0 on success; the
returns the number of values read. The block buffers need not be longer
than 32 bytes.
-The above functions are all macros, that resolve to calls to the
-i2c_smbus_access function, that on its turn calls a specific ioctl
+The above functions are all inline functions, that resolve to calls to
+the i2c_smbus_access function, that on its turn calls a specific ioctl
with the data in a specific format. Read the source code if you
want to know what happens behind the screens.
+
+
+Implementation details
+======================
+
+For the interested, here's the code flow which happens inside the kernel
+when you use the /dev interface to I2C:
+
+1* Your program opens /dev/i2c-N and calls ioctl() on it, as described in
+section "C example" above.
+
+2* These open() and ioctl() calls are handled by the i2c-dev kernel
+driver: see i2c-dev.c:i2cdev_open() and i2c-dev.c:i2cdev_ioctl(),
+respectively. You can think of i2c-dev as a generic I2C chip driver
+that can be programmed from user-space.
+
+3* Some ioctl() calls are for administrative tasks and are handled by
+i2c-dev directly. Examples include I2C_SLAVE (set the address of the
+device you want to access) and I2C_PEC (enable or disable SMBus error
+checking on future transactions.)
+
+4* Other ioctl() calls are converted to in-kernel function calls by
+i2c-dev. Examples include I2C_FUNCS, which queries the I2C adapter
+functionality using i2c.h:i2c_get_functionality(), and I2C_SMBUS, which
+performs an SMBus transaction using i2c-core.c:i2c_smbus_xfer().
+
+The i2c-dev driver is responsible for checking all the parameters that
+come from user-space for validity. After this point, there is no
+difference between these calls that came from user-space through i2c-dev
+and calls that would have been performed by kernel I2C chip drivers
+directly. This means that I2C bus drivers don't need to implement
+anything special to support access from user-space.
+
+5* These i2c-core.c/i2c.h functions are wrappers to the actual
+implementation of your I2C bus driver. Each adapter must declare
+callback functions implementing these standard calls.
+i2c.h:i2c_get_functionality() calls i2c_adapter.algo->functionality(),
+while i2c-core.c:i2c_smbus_xfer() calls either
+adapter.algo->smbus_xfer() if it is implemented, or if not,
+i2c-core.c:i2c_smbus_xfer_emulated() which in turn calls
+i2c_adapter.algo->master_xfer().
+
+After your I2C bus driver has processed these requests, execution runs
+up the call chain, with almost no processing done, except by i2c-dev to
+package the returned data, if any, in suitable format for the ioctl.
diff --git a/Documentation/i2c/smbus-protocol b/Documentation/i2c/smbus-protocol
index 24bfb65da17d..9df47441f0e7 100644
--- a/Documentation/i2c/smbus-protocol
+++ b/Documentation/i2c/smbus-protocol
@@ -109,8 +109,8 @@ specified through the Comm byte.
S Addr Wr [A] Comm [A] DataLow [A] DataHigh [A] P
-SMBus Process Call
-==================
+SMBus Process Call: i2c_smbus_process_call()
+=============================================
This command selects a device register (through the Comm byte), sends
16 bits of data to it, and reads 16 bits of data in return.
diff --git a/Documentation/i2c/writing-clients b/Documentation/i2c/writing-clients
index 6b61b3a2e90b..d73ee117a8ca 100644
--- a/Documentation/i2c/writing-clients
+++ b/Documentation/i2c/writing-clients
@@ -606,6 +606,8 @@ SMBus communication
extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
u8 command, u16 value);
+ extern s32 i2c_smbus_process_call(struct i2c_client *client,
+ u8 command, u16 value);
extern s32 i2c_smbus_read_block_data(struct i2c_client * client,
u8 command, u8 *values);
extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
@@ -621,8 +623,6 @@ These ones were removed from i2c-core because they had no users, but could
be added back later if needed:
extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
- extern s32 i2c_smbus_process_call(struct i2c_client * client,
- u8 command, u16 value);
extern s32 i2c_smbus_block_process_call(struct i2c_client *client,
u8 command, u8 length,
u8 *values)
diff --git a/arch/arm/mach-omap1/board-h3.c b/arch/arm/mach-omap1/board-h3.c
index 2ced6d9984d2..adfcd7b51393 100644
--- a/arch/arm/mach-omap1/board-h3.c
+++ b/arch/arm/mach-omap1/board-h3.c
@@ -476,6 +476,10 @@ static struct i2c_board_info __initdata h3_i2c_board_info[] = {
I2C_BOARD_INFO("tps65013", 0x48),
/* .irq = OMAP_GPIO_IRQ(??), */
},
+ {
+ I2C_BOARD_INFO("isp1301_omap", 0x2d),
+ .irq = OMAP_GPIO_IRQ(14),
+ },
};
static struct omap_gpio_switch h3_gpio_switches[] __initdata = {
diff --git a/arch/arm/mach-omap2/board-h4.c b/arch/arm/mach-omap2/board-h4.c
index d4e3b6fc4705..2fef2c845083 100644
--- a/arch/arm/mach-omap2/board-h4.c
+++ b/arch/arm/mach-omap2/board-h4.c
@@ -18,6 +18,7 @@
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
+#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/err.h>
#include <linux/clk.h>
@@ -391,6 +392,13 @@ static struct omap_board_config_kernel h4_config[] = {
{ OMAP_TAG_LCD, &h4_lcd_config },
};
+static struct i2c_board_info __initdata h4_i2c_board_info[] = {
+ {
+ I2C_BOARD_INFO("isp1301_omap", 0x2d),
+ .irq = OMAP_GPIO_IRQ(125),
+ },
+};
+
static void __init omap_h4_init(void)
{
/*
@@ -411,6 +419,9 @@ static void __init omap_h4_init(void)
}
#endif
+ i2c_register_board_info(1, h4_i2c_board_info,
+ ARRAY_SIZE(h4_i2c_board_info));
+
platform_add_devices(h4_devices, ARRAY_SIZE(h4_devices));
omap_board_config = h4_config;
omap_board_config_size = ARRAY_SIZE(h4_config);
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c
index cdb8311e4ef7..27a5d397f9a1 100644
--- a/drivers/hwmon/dme1737.c
+++ b/drivers/hwmon/dme1737.c
@@ -175,11 +175,11 @@ static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
* Data structures and manipulation thereof
* --------------------------------------------------------------------- */
-/* For ISA chips, we abuse the i2c_client addr and name fields. We also use
- the driver field to differentiate between I2C and ISA chips. */
struct dme1737_data {
- struct i2c_client client;
+ struct i2c_client *client; /* for I2C devices only */
struct device *hwmon_dev;
+ const char *name;
+ unsigned int addr; /* for ISA devices only */
struct mutex update_lock;
int valid; /* !=0 if following fields are valid */
@@ -512,11 +512,12 @@ static inline int PWM_OFF_TO_REG(int val, int ix, int reg)
* before calling dme1737_read or dme1737_write.
* --------------------------------------------------------------------- */
-static u8 dme1737_read(struct i2c_client *client, u8 reg)
+static u8 dme1737_read(const struct dme1737_data *data, u8 reg)
{
+ struct i2c_client *client = data->client;
s32 val;
- if (client->driver) { /* I2C device */
+ if (client) { /* I2C device */
val = i2c_smbus_read_byte_data(client, reg);
if (val < 0) {
@@ -525,18 +526,19 @@ static u8 dme1737_read(struct i2c_client *client, u8 reg)
"maintainer.\n", reg);
}
} else { /* ISA device */
- outb(reg, client->addr);
- val = inb(client->addr + 1);
+ outb(reg, data->addr);
+ val = inb(data->addr + 1);
}
return val;
}
-static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 val)
+static s32 dme1737_write(const struct dme1737_data *data, u8 reg, u8 val)
{
+ struct i2c_client *client = data->client;
s32 res = 0;
- if (client->driver) { /* I2C device */
+ if (client) { /* I2C device */
res = i2c_smbus_write_byte_data(client, reg, val);
if (res < 0) {
@@ -545,8 +547,8 @@ static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 val)
"maintainer.\n", reg);
}
} else { /* ISA device */
- outb(reg, client->addr);
- outb(val, client->addr + 1);
+ outb(reg, data->addr);
+ outb(val, data->addr + 1);
}
return res;
@@ -555,7 +557,6 @@ static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 val)
static struct dme1737_data *dme1737_update_device(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
int ix;
u8 lsb[5];
@@ -563,7 +564,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
/* Enable a Vbat monitoring cycle every 10 mins */
if (time_after(jiffies, data->last_vbat + 600 * HZ) || !data->valid) {
- dme1737_write(client, DME1737_REG_CONFIG, dme1737_read(client,
+ dme1737_write(data, DME1737_REG_CONFIG, dme1737_read(data,
DME1737_REG_CONFIG) | 0x10);
data->last_vbat = jiffies;
}
@@ -571,7 +572,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
/* Sample register contents every 1 sec */
if (time_after(jiffies, data->last_update + HZ) || !data->valid) {
if (data->type != sch5027) {
- data->vid = dme1737_read(client, DME1737_REG_VID) &
+ data->vid = dme1737_read(data, DME1737_REG_VID) &
0x3f;
}
@@ -580,11 +581,11 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
/* Voltage inputs are stored as 16 bit values even
* though they have only 12 bits resolution. This is
* to make it consistent with the temp inputs. */
- data->in[ix] = dme1737_read(client,
+ data->in[ix] = dme1737_read(data,
DME1737_REG_IN(ix)) << 8;
- data->in_min[ix] = dme1737_read(client,
+ data->in_min[ix] = dme1737_read(data,
DME1737_REG_IN_MIN(ix));
- data->in_max[ix] = dme1737_read(client,
+ data->in_max[ix] = dme1737_read(data,
DME1737_REG_IN_MAX(ix));
}
@@ -595,14 +596,14 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
* to take advantage of implicit conversions between
* register values (2's complement) and temp values
* (signed decimal). */
- data->temp[ix] = dme1737_read(client,
+ data->temp[ix] = dme1737_read(data,
DME1737_REG_TEMP(ix)) << 8;
- data->temp_min[ix] = dme1737_read(client,
+ data->temp_min[ix] = dme1737_read(data,
DME1737_REG_TEMP_MIN(ix));
- data->temp_max[ix] = dme1737_read(client,
+ data->temp_max[ix] = dme1737_read(data,
DME1737_REG_TEMP_MAX(ix));
if (data->type != sch5027) {
- data->temp_offset[ix] = dme1737_read(client,
+ data->temp_offset[ix] = dme1737_read(data,
DME1737_REG_TEMP_OFFSET(ix));
}
}
@@ -612,7 +613,7 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
* which the registers are read (MSB first, then LSB) is
* important! */
for (ix = 0; ix < ARRAY_SIZE(lsb); ix++) {
- lsb[ix] = dme1737_read(client,
+ lsb[ix] = dme1737_read(data,
DME1737_REG_IN_TEMP_LSB(ix));
}
for (ix = 0; ix < ARRAY_SIZE(data->in); ix++) {
@@ -631,19 +632,19 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
if (!(data->has_fan & (1 << ix))) {
continue;
}
- data->fan[ix] = dme1737_read(client,
+ data->fan[ix] = dme1737_read(data,
DME1737_REG_FAN(ix));
- data->fan[ix] |= dme1737_read(client,
+ data->fan[ix] |= dme1737_read(data,
DME1737_REG_FAN(ix) + 1) << 8;
- data->fan_min[ix] = dme1737_read(client,
+ data->fan_min[ix] = dme1737_read(data,
DME1737_REG_FAN_MIN(ix));
- data->fan_min[ix] |= dme1737_read(client,
+ data->fan_min[ix] |= dme1737_read(data,
DME1737_REG_FAN_MIN(ix) + 1) << 8;
- data->fan_opt[ix] = dme1737_read(client,
+ data->fan_opt[ix] = dme1737_read(data,
DME1737_REG_FAN_OPT(ix));
/* fan_max exists only for fan[5-6] */
if (ix > 3) {
- data->fan_max[ix - 4] = dme1737_read(client,
+ data->fan_max[ix - 4] = dme1737_read(data,
DME1737_REG_FAN_MAX(ix));
}
}
@@ -655,63 +656,63 @@ static struct dme1737_data *dme1737_update_device(struct device *dev)
if (!(data->has_pwm & (1 << ix))) {
continue;
}
- data->pwm[ix] = dme1737_read(client,
+ data->pwm[ix] = dme1737_read(data,
DME1737_REG_PWM(ix));
- data->pwm_freq[ix] = dme1737_read(client,
+ data->pwm_freq[ix] = dme1737_read(data,
DME1737_REG_PWM_FREQ(ix));
/* pwm_config and pwm_min exist only for pwm[1-3] */
if (ix < 3) {
- data->pwm_config[ix] = dme1737_read(client,
+ data->pwm_config[ix] = dme1737_read(data,
DME1737_REG_PWM_CONFIG(ix));
- data->pwm_min[ix] = dme1737_read(client,
+ data->pwm_min[ix] = dme1737_read(data,
DME1737_REG_PWM_MIN(ix));
}
}
for (ix = 0; ix < ARRAY_SIZE(data->pwm_rr); ix++) {
- data->pwm_rr[ix] = dme1737_read(client,
+ data->pwm_rr[ix] = dme1737_read(data,
DME1737_REG_PWM_RR(ix));
}
/* Thermal zone registers */
for (ix = 0; ix < ARRAY_SIZE(data->zone_low); ix++) {
- data->zone_low[ix] = dme1737_read(client,
+ data->zone_low[ix] = dme1737_read(data,
DME1737_REG_ZONE_LOW(ix));
- data->zone_abs[ix] = dme1737_read(client,
+ data->zone_abs[ix] = dme1737_read(data,
DME1737_REG_ZONE_ABS(ix));
}
if (data->type != sch5027) {
for (ix = 0; ix < ARRAY_SIZE(data->zone_hyst); ix++) {
- data->zone_hyst[ix] = dme1737_read(client,
+ data->zone_hyst[ix] = dme1737_read(data,
DME1737_REG_ZONE_HYST(ix));
}
}
/* Alarm registers */
- data->alarms = dme1737_read(client,
+ data->alarms = dme1737_read(data,
DME1737_REG_ALARM1);
/* Bit 7 tells us if the other alarm registers are non-zero and
* therefore also need to be read */
if (data->alarms & 0x80) {
- data->alarms |= dme1737_read(client,
+ data->alarms |= dme1737_read(data,
DME1737_REG_ALARM2) << 8;
- data->alarms |= dme1737_read(client,
+ data->alarms |= dme1737_read(data,
DME1737_REG_ALARM3) << 16;
}
/* The ISA chips require explicit clearing of alarm bits.
* Don't worry, an alarm will come back if the condition
* that causes it still exists */
- if (!client->driver) {
+ if (!data->client) {
if (data->alarms & 0xff0000) {
- dme1737_write(client, DME1737_REG_ALARM3,
+ dme1737_write(data, DME1737_REG_ALARM3,
0xff);
}
if (data->alarms & 0xff00) {
- dme1737_write(client, DME1737_REG_ALARM2,
+ dme1737_write(data, DME1737_REG_ALARM2,
0xff);
}
if (data->alarms & 0xff) {
- dme1737_write(client, DME1737_REG_ALARM1,
+ dme1737_write(data, DME1737_REG_ALARM1,
0xff);
}
}
@@ -770,7 +771,6 @@ static ssize_t set_in(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
@@ -781,12 +781,12 @@ static ssize_t set_in(struct device *dev, struct device_attribute *attr,
switch (fn) {
case SYS_IN_MIN:
data->in_min[ix] = IN_TO_REG(val, data->in_nominal[ix]);
- dme1737_write(client, DME1737_REG_IN_MIN(ix),
+ dme1737_write(data, DME1737_REG_IN_MIN(ix),
data->in_min[ix]);
break;
case SYS_IN_MAX:
data->in_max[ix] = IN_TO_REG(val, data->in_nominal[ix]);
- dme1737_write(client, DME1737_REG_IN_MAX(ix),
+ dme1737_write(data, DME1737_REG_IN_MAX(ix),
data->in_max[ix]);
break;
default:
@@ -850,7 +850,6 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
@@ -861,17 +860,17 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
switch (fn) {
case SYS_TEMP_MIN:
data->temp_min[ix] = TEMP_TO_REG(val);
- dme1737_write(client, DME1737_REG_TEMP_MIN(ix),
+ dme1737_write(data, DME1737_REG_TEMP_MIN(ix),
data->temp_min[ix]);
break;
case SYS_TEMP_MAX:
data->temp_max[ix] = TEMP_TO_REG(val);
- dme1737_write(client, DME1737_REG_TEMP_MAX(ix),
+ dme1737_write(data, DME1737_REG_TEMP_MAX(ix),
data->temp_max[ix]);
break;
case SYS_TEMP_OFFSET:
data->temp_offset[ix] = TEMP_TO_REG(val);
- dme1737_write(client, DME1737_REG_TEMP_OFFSET(ix),
+ dme1737_write(data, DME1737_REG_TEMP_OFFSET(ix),
data->temp_offset[ix]);
break;
default:
@@ -939,7 +938,6 @@ static ssize_t set_zone(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
@@ -950,37 +948,37 @@ static ssize_t set_zone(struct device *dev, struct device_attribute *attr,
switch (fn) {
case SYS_ZONE_AUTO_POINT1_TEMP_HYST:
/* Refresh the cache */
- data->zone_low[ix] = dme1737_read(client,
+ data->zone_low[ix] = dme1737_read(data,
DME1737_REG_ZONE_LOW(ix));
/* Modify the temp hyst value */
data->zone_hyst[ix == 2] = TEMP_HYST_TO_REG(
TEMP_FROM_REG(data->zone_low[ix], 8) -
- val, ix, dme1737_read(client,
+ val, ix, dme1737_read(data,
DME1737_REG_ZONE_HYST(ix == 2)));
- dme1737_write(client, DME1737_REG_ZONE_HYST(ix == 2),
+ dme1737_write(data, DME1737_REG_ZONE_HYST(ix == 2),
data->zone_hyst[ix == 2]);
break;
case SYS_ZONE_AUTO_POINT1_TEMP:
data->zone_low[ix] = TEMP_TO_REG(val);
- dme1737_write(client, DME1737_REG_ZONE_LOW(ix),
+ dme1737_write(data, DME1737_REG_ZONE_LOW(ix),
data->zone_low[ix]);
break;
case SYS_ZONE_AUTO_POINT2_TEMP:
/* Refresh the cache */
- data->zone_low[ix] = dme1737_read(client,
+ data->zone_low[ix] = dme1737_read(data,
DME1737_REG_ZONE_LOW(ix));
/* Modify the temp range value (which is stored in the upper
* nibble of the pwm_freq register) */
data->pwm_freq[ix] = TEMP_RANGE_TO_REG(val -
TEMP_FROM_REG(data->zone_low[ix], 8),
- dme1737_read(client,
+ dme1737_read(data,
DME1737_REG_PWM_FREQ(ix)));
- dme1737_write(client, DME1737_REG_PWM_FREQ(ix),
+ dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
data->pwm_freq[ix]);
break;
case SYS_ZONE_AUTO_POINT3_TEMP:
data->zone_abs[ix] = TEMP_TO_REG(val);
- dme1737_write(client, DME1737_REG_ZONE_ABS(ix),
+ dme1737_write(data, DME1737_REG_ZONE_ABS(ix),
data->zone_abs[ix]);
break;
default:
@@ -1046,7 +1044,6 @@ static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
@@ -1060,21 +1057,21 @@ static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
data->fan_min[ix] = FAN_TO_REG(val, 0);
} else {
/* Refresh the cache */
- data->fan_opt[ix] = dme1737_read(client,
+ data->fan_opt[ix] = dme1737_read(data,
DME1737_REG_FAN_OPT(ix));
/* Modify the fan min value */
data->fan_min[ix] = FAN_TO_REG(val,
FAN_TPC_FROM_REG(data->fan_opt[ix]));
}
- dme1737_write(client, DME1737_REG_FAN_MIN(ix),
+ dme1737_write(data, DME1737_REG_FAN_MIN(ix),
data->fan_min[ix] & 0xff);
- dme1737_write(client, DME1737_REG_FAN_MIN(ix) + 1,
+ dme1737_write(data, DME1737_REG_FAN_MIN(ix) + 1,
data->fan_min[ix] >> 8);
break;
case SYS_FAN_MAX:
/* Only valid for fan[5-6] */
data->fan_max[ix - 4] = FAN_MAX_TO_REG(val);
- dme1737_write(client, DME1737_REG_FAN_MAX(ix),
+ dme1737_write(data, DME1737_REG_FAN_MAX(ix),
data->fan_max[ix - 4]);
break;
case SYS_FAN_TYPE:
@@ -1086,9 +1083,9 @@ static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
val);
goto exit;
}
- data->fan_opt[ix] = FAN_TYPE_TO_REG(val, dme1737_read(client,
+ data->fan_opt[ix] = FAN_TYPE_TO_REG(val, dme1737_read(data,
DME1737_REG_FAN_OPT(ix)));
- dme1737_write(client, DME1737_REG_FAN_OPT(ix),
+ dme1737_write(data, DME1737_REG_FAN_OPT(ix),
data->fan_opt[ix]);
break;
default:
@@ -1185,7 +1182,6 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
struct sensor_device_attribute_2
*sensor_attr_2 = to_sensor_dev_attr_2(attr);
int ix = sensor_attr_2->index;
@@ -1196,12 +1192,12 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
switch (fn) {
case SYS_PWM:
data->pwm[ix] = SENSORS_LIMIT(val, 0, 255);
- dme1737_write(client, DME1737_REG_PWM(ix), data->pwm[ix]);
+ dme1737_write(data, DME1737_REG_PWM(ix), data->pwm[ix]);
break;
case SYS_PWM_FREQ:
- data->pwm_freq[ix] = PWM_FREQ_TO_REG(val, dme1737_read(client,
+ data->pwm_freq[ix] = PWM_FREQ_TO_REG(val, dme1737_read(data,
DME1737_REG_PWM_FREQ(ix)));
- dme1737_write(client, DME1737_REG_PWM_FREQ(ix),
+ dme1737_write(data, DME1737_REG_PWM_FREQ(ix),
data->pwm_freq[ix]);
break;
case SYS_PWM_ENABLE:
@@ -1214,7 +1210,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
goto exit;
}
/* Refresh the cache */
- data->pwm_config[ix] = dme1737_read(client,
+ data->pwm_config[ix] = dme1737_read(data,
DME1737_REG_PWM_CONFIG(ix));
if (val == PWM_EN_FROM_REG(data->pwm_config[ix])) {
/* Bail out if no change */
@@ -1226,14 +1222,14 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
data->pwm_acz[ix] = PWM_ACZ_FROM_REG(
data->pwm_config[ix]);
/* Save the current ramp rate state and disable it */
- data->pwm_rr[ix > 0] = dme1737_read(client,
+ data->pwm_rr[ix > 0] = dme1737_read(data,
DME1737_REG_PWM_RR(ix > 0));
data->pwm_rr_en &= ~(1 << ix);
if (PWM_RR_EN_FROM_REG(data->pwm_rr[ix > 0], ix)) {
data->pwm_rr_en |= (1 << ix);
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(0, ix,
data->pwm_rr[ix > 0]);
- dme1737_write(client,
+ dme1737_write(data,
DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
}
@@ -1247,14 +1243,14 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
/* Turn fan fully on */
data->pwm_config[ix] = PWM_EN_TO_REG(0,
data->pwm_config[ix]);
- dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
+ dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
break;
case 1:
/* Turn on manual mode */
data->pwm_config[ix] = PWM_EN_TO_REG(1,
data->pwm_config[ix]);
- dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
+ dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
/* Change permissions of pwm[ix] to read-writeable */
dme1737_chmod_file(dev, dme1737_pwm_chmod_attr[ix],
@@ -1269,14 +1265,14 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
data->pwm_config[ix] = PWM_ACZ_TO_REG(
data->pwm_acz[ix],
data->pwm_config[ix]);
- dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
+ dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
/* Enable PWM ramp rate if previously enabled */
if (data->pwm_rr_en & (1 << ix)) {
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(1, ix,
- dme1737_read(client,
+ dme1737_read(data,
DME1737_REG_PWM_RR(ix > 0)));
- dme1737_write(client,
+ dme1737_write(data,
DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
}
@@ -1286,9 +1282,9 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
case SYS_PWM_RAMP_RATE:
/* Only valid for pwm[1-3] */
/* Refresh the cache */
- data->pwm_config[ix] = dme1737_read(client,
+ data->pwm_config[ix] = dme1737_read(data,
DME1737_REG_PWM_CONFIG(ix));
- data->pwm_rr[ix > 0] = dme1737_read(client,
+ data->pwm_rr[ix > 0] = dme1737_read(data,
DME1737_REG_PWM_RR(ix > 0));
/* Set the ramp rate value */
if (val > 0) {
@@ -1301,7 +1297,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
data->pwm_rr[ix > 0] = PWM_RR_EN_TO_REG(val > 0, ix,
data->pwm_rr[ix > 0]);
}
- dme1737_write(client, DME1737_REG_PWM_RR(ix > 0),
+ dme1737_write(data, DME1737_REG_PWM_RR(ix > 0),
data->pwm_rr[ix > 0]);
break;
case SYS_PWM_AUTO_CHANNELS_ZONE:
@@ -1315,14 +1311,14 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
goto exit;
}
/* Refresh the cache */
- data->pwm_config[ix] = dme1737_read(client,
+ data->pwm_config[ix] = dme1737_read(data,
DME1737_REG_PWM_CONFIG(ix));
if (PWM_EN_FROM_REG(data->pwm_config[ix]) == 2) {
/* PWM is already in auto mode so update the temp
* channel assignment */
data->pwm_config[ix] = PWM_ACZ_TO_REG(val,
data->pwm_config[ix]);
- dme1737_write(client, DME1737_REG_PWM_CONFIG(ix),
+ dme1737_write(data, DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
} else {
/* PWM is not in auto mode so we save the temp
@@ -1333,7 +1329,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
case SYS_PWM_AUTO_PWM_MIN:
/* Only valid for pwm[1-3] */
/* Refresh the cache */
- data->pwm_min[ix] = dme1737_read(client,
+ data->pwm_min[ix] = dme1737_read(data,
DME1737_REG_PWM_MIN(ix));
/* There are only 2 values supported for the auto_pwm_min
* value: 0 or auto_point1_pwm. So if the temperature drops
@@ -1341,20 +1337,20 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
* off or runs at auto_point1_pwm duty-cycle. */
if (val > ((data->pwm_min[ix] + 1) / 2)) {
data->pwm_rr[0] = PWM_OFF_TO_REG(1, ix,
- dme1737_read(client,
+ dme1737_read(data,
DME1737_REG_PWM_RR(0)));
} else {
data->pwm_rr[0] = PWM_OFF_TO_REG(0, ix,
- dme1737_read(client,
+ dme1737_read(data,
DME1737_REG_PWM_RR(0)));
}
- dme1737_write(client, DME1737_REG_PWM_RR(0),
+ dme1737_write(data, DME1737_REG_PWM_RR(0),
data->pwm_rr[0]);
break;
case SYS_PWM_AUTO_POINT1_PWM:
/* Only valid for pwm[1-3] */
data->pwm_min[ix] = SENSORS_LIMIT(val, 0, 255);
- dme1737_write(client, DME1737_REG_PWM_MIN(ix),
+ dme1737_write(data, DME1737_REG_PWM_MIN(ix),
data->pwm_min[ix]);
break;
default:
@@ -1402,7 +1398,7 @@ static ssize_t show_name(struct device *dev, struct device_attribute *attr,
{
struct dme1737_data *data = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", data->client.name);
+ return sprintf(buf, "%s\n", data->name);
}
/* ---------------------------------------------------------------------
@@ -1908,7 +1904,7 @@ static void dme1737_remove_files(struct device *dev)
sysfs_remove_group(&dev->kobj, &dme1737_group);
- if (!data->client.driver) {
+ if (!data->client) {
sysfs_remove_file(&dev->kobj, &dev_attr_name.attr);
}
}
@@ -1919,7 +1915,7 @@ static int dme1737_create_files(struct device *dev)
int err, ix;
/* Create a name attribute for ISA devices */
- if (!data->client.driver &&
+ if (!data->client &&
(err = sysfs_create_file(&dev->kobj, &dev_attr_name.attr))) {
goto exit;
}
@@ -2013,14 +2009,14 @@ exit:
static int dme1737_init_device(struct device *dev)
{
struct dme1737_data *data = dev_get_drvdata(dev);
- struct i2c_client *client = &data->client;
+ struct i2c_client *client = data->client;
int ix;
u8 reg;
/* Point to the right nominal voltages array */
data->in_nominal = IN_NOMINAL(data->type);
- data->config = dme1737_read(client, DME1737_REG_CONFIG);
+ data->config = dme1737_read(data, DME1737_REG_CONFIG);
/* Inform if part is not monitoring/started */
if (!(data->config & 0x01)) {
if (!force_start) {
@@ -2032,7 +2028,7 @@ static int dme1737_init_device(struct device *dev)
/* Force monitoring */
data->config |= 0x01;
- dme1737_write(client, DME1737_REG_CONFIG, data->config);
+ dme1737_write(data, DME1737_REG_CONFIG, data->config);
}
/* Inform if part is not ready */
if (!(data->config & 0x04)) {
@@ -2041,8 +2037,8 @@ static int dme1737_init_device(struct device *dev)
}
/* Determine which optional fan and pwm features are enabled/present */
- if (client->driver) { /* I2C chip */
- data->config2 = dme1737_read(client, DME1737_REG_CONFIG2);
+ if (client) { /* I2C chip */
+ data->config2 = dme1737_read(data, DME1737_REG_CONFIG2);
/* Check if optional fan3 input is enabled */
if (data->config2 & 0x04) {
data->has_fan |= (1 << 2);
@@ -2051,7 +2047,7 @@ static int dme1737_init_device(struct device *dev)
/* Fan4 and pwm3 are only available if the client's I2C address
* is the default 0x2e. Otherwise the I/Os associated with
* these functions are used for addr enable/select. */
- if (data->client.addr == 0x2e) {
+ if (client->addr == 0x2e) {
data->has_fan |= (1 << 3);
data->has_pwm |= (1 << 2);
}
@@ -2086,16 +2082,16 @@ static int dme1737_init_device(struct device *dev)
(data->has_fan & (1 << 4)) ? "yes" : "no",
(data->has_fan & (1 << 5)) ? "yes" : "no");
- reg = dme1737_read(client, DME1737_REG_TACH_PWM);
+ reg = dme1737_read(data, DME1737_REG_TACH_PWM);
/* Inform if fan-to-pwm mapping differs from the default */
- if (client->driver && reg != 0xa4) { /* I2C chip */
+ if (client && reg != 0xa4) { /* I2C chip */
dev_warn(dev, "Non-standard fan to pwm mapping: "
"fan1->pwm%d, fan2->pwm%d, fan3->pwm%d, "
"fan4->pwm%d. Please report to the driver "
"maintainer.\n",
(reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
((reg >> 4) & 0x03) + 1, ((reg >> 6) & 0x03) + 1);
- } else if (!client->driver && reg != 0x24) { /* ISA chip */
+ } else if (!client && reg != 0x24) { /* ISA chip */
dev_warn(dev, "Non-standard fan to pwm mapping: "
"fan1->pwm%d, fan2->pwm%d, fan3->pwm%d. "
"Please report to the driver maintainer.\n",
@@ -2108,7 +2104,7 @@ static int dme1737_init_device(struct device *dev)
* disabled). */
if (!(data->config & 0x02)) {
for (ix = 0; ix < 3; ix++) {
- data->pwm_config[ix] = dme1737_read(client,
+ data->pwm_config[ix] = dme1737_read(data,
DME1737_REG_PWM_CONFIG(ix));
if ((data->has_pwm & (1 << ix)) &&
(PWM_EN_FROM_REG(data->pwm_config[ix]) == -1)) {
@@ -2116,8 +2112,8 @@ static int dme1737_init_device(struct device *dev)
"manual mode.\n", ix + 1);
data->pwm_config[ix] = PWM_EN_TO_REG(1,
data->pwm_config[ix]);
- dme1737_write(client, DME1737_REG_PWM(ix), 0);
- dme1737_write(client,
+ dme1737_write(data, DME1737_REG_PWM(ix), 0);
+ dme1737_write(data,
DME1737_REG_PWM_CONFIG(ix),
data->pwm_config[ix]);
}
@@ -2191,37 +2187,24 @@ exit:
return err;
}
-static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
- int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int dme1737_i2c_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
+ struct i2c_adapter *adapter = client->adapter;
+ struct device *dev = &adapter->dev;
u8 company, verstep = 0;
- struct i2c_client *client;
- struct dme1737_data *data;
- struct device *dev;
- int err = 0;
const char *name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- goto exit;
- }
-
- if (!(data = kzalloc(sizeof(struct dme1737_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
+ return -ENODEV;
}
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &dme1737_i2c_driver;
- dev = &client->dev;
-
/* A negative kind means that the driver was loaded with no force
* parameter (default), so we must identify the chip. */
if (kind < 0) {
- company = dme1737_read(client, DME1737_REG_COMPANY);
- verstep = dme1737_read(client, DME1737_REG_VERSTEP);
+ company = i2c_smbus_read_byte_data(client, DME1737_REG_COMPANY);
+ verstep = i2c_smbus_read_byte_data(client, DME1737_REG_VERSTEP);
if (company == DME1737_COMPANY_SMSC &&
(verstep & DME1737_VERSTEP_MASK) == DME1737_VERSTEP) {
@@ -2230,8 +2213,7 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
verstep == SCH5027_VERSTEP) {
kind = sch5027;
} else {
- err = -ENODEV;
- goto exit_kfree;
+ return -ENODEV;
}
}
@@ -2241,32 +2223,44 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
kind = dme1737;
name = "dme1737";
}
- data->type = kind;
-
- /* Fill in the remaining client fields and put it into the global
- * list */
- strlcpy(client->name, name, I2C_NAME_SIZE);
- mutex_init(&data->update_lock);
-
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client))) {
- goto exit_kfree;
- }
dev_info(dev, "Found a %s chip at 0x%02x (rev 0x%02x).\n",
kind == sch5027 ? "SCH5027" : "DME1737", client->addr,
verstep);
+ strlcpy(info->type, name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int dme1737_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct dme1737_data *data;
+ struct device *dev = &client->dev;
+ int err;
+
+ data = kzalloc(sizeof(struct dme1737_data), GFP_KERNEL);
+ if (!data) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ i2c_set_clientdata(client, data);
+ data->type = id->driver_data;
+ data->client = client;
+ data->name = client->name;
+ mutex_init(&data->update_lock);
/* Initialize the DME1737 chip */
if ((err = dme1737_init_device(dev))) {
dev_err(dev, "Failed to initialize device.\n");
- goto exit_detach;
+ goto exit_kfree;
}
/* Create sysfs files */
if ((err = dme1737_create_files(dev))) {
dev_err(dev, "Failed to create sysfs files.\n");
- goto exit_detach;
+ goto exit_kfree;
}
/* Register device */
@@ -2281,45 +2275,40 @@ static int dme1737_i2c_detect(struct i2c_adapter *adapter, int address,
exit_remove:
dme1737_remove_files(dev);
-exit_detach:
- i2c_detach_client(client);
exit_kfree:
kfree(data);
exit:
return err;
}
-static int dme1737_i2c_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON)) {
- return 0;
- }
-
- return i2c_probe(adapter, &addr_data, dme1737_i2c_detect);
-}
-
-static int dme1737_i2c_detach_client(struct i2c_client *client)
+static int dme1737_i2c_remove(struct i2c_client *client)
{
struct dme1737_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
dme1737_remove_files(&client->dev);
- if ((err = i2c_detach_client(client))) {
- return err;
- }
-
kfree(data);
return 0;
}
+static const struct i2c_device_id dme1737_id[] = {
+ { "dme1737", dme1737 },
+ { "sch5027", sch5027 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, dme1737_id);
+
static struct i2c_driver dme1737_i2c_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "dme1737",
},
- .attach_adapter = dme1737_i2c_attach_adapter,
- .detach_client = dme1737_i2c_detach_client,
+ .probe = dme1737_i2c_probe,
+ .remove = dme1737_i2c_remove,
+ .id_table = dme1737_id,
+ .detect = dme1737_i2c_detect,
+ .address_data = &addr_data,
};
/* ---------------------------------------------------------------------
@@ -2403,7 +2392,6 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
{
u8 company, device;
struct resource *res;
- struct i2c_client *client;
struct dme1737_data *data;
struct device *dev = &pdev->dev;
int err;
@@ -2422,15 +2410,13 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
goto exit_release_region;
}
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = res->start;
+ data->addr = res->start;
platform_set_drvdata(pdev, data);
/* Skip chip detection if module is loaded with force_id parameter */
if (!force_id) {
- company = dme1737_read(client, DME1737_REG_COMPANY);
- device = dme1737_read(client, DME1737_REG_DEVICE);
+ company = dme1737_read(data, DME1737_REG_COMPANY);
+ device = dme1737_read(data, DME1737_REG_DEVICE);
if (!((company == DME1737_COMPANY_SMSC) &&
(device == SCH311X_DEVICE))) {
@@ -2441,10 +2427,10 @@ static int __devinit dme1737_isa_probe(struct platform_device *pdev)
data->type = sch311x;
/* Fill in the remaining client fields and initialize the mutex */
- strlcpy(client->name, "sch311x", I2C_NAME_SIZE);
+ data->name = "sch311x";
mutex_init(&data->update_lock);
- dev_info(dev, "Found a SCH311x chip at 0x%04x\n", client->addr);
+ dev_info(dev, "Found a SCH311x chip at 0x%04x\n", data->addr);
/* Initialize the chip */
if ((err = dme1737_init_device(dev))) {
@@ -2485,7 +2471,7 @@ static int __devexit dme1737_isa_remove(struct platform_device *pdev)
hwmon_device_unregister(data->hwmon_dev);
dme1737_remove_files(&pdev->dev);
- release_region(data->client.addr, DME1737_EXTENT);
+ release_region(data->addr, DME1737_EXTENT);
platform_set_drvdata(pdev, NULL);
kfree(data);
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 6ee997b2817c..acadbc51fc0f 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -55,7 +55,7 @@ config I2C_AMD756
config I2C_AMD756_S4882
tristate "SMBus multiplexing on the Tyan S4882"
- depends on I2C_AMD756 && EXPERIMENTAL
+ depends on I2C_AMD756 && X86 && EXPERIMENTAL
help
Enabling this option will add specific SMBus support for the Tyan
S4882 motherboard. On this 4-CPU board, the SMBus is multiplexed
@@ -148,7 +148,7 @@ config I2C_NFORCE2
config I2C_NFORCE2_S4985
tristate "SMBus multiplexing on the Tyan S4985"
- depends on I2C_NFORCE2 && EXPERIMENTAL
+ depends on I2C_NFORCE2 && X86 && EXPERIMENTAL
help
Enabling this option will add specific SMBus support for the Tyan
S4985 motherboard. On this 4-CPU board, the SMBus is multiplexed
@@ -209,7 +209,7 @@ config I2C_VIA
will be called i2c-via.
config I2C_VIAPRO
- tristate "VIA VT82C596/82C686/82xx and CX700"
+ tristate "VIA VT82C596/82C686/82xx and CX700/VX800/VX820"
depends on PCI
help
If you say yes to this option, support will be included for the VIA
@@ -223,6 +223,8 @@ config I2C_VIAPRO
VT8237R/A/S
VT8251
CX700
+ VX800
+ VX820
This driver can also be built as a module. If so, the module
will be called i2c-viapro.
@@ -330,6 +332,18 @@ config I2C_GPIO
This is a very simple bitbanging I2C driver utilizing the
arch-neutral GPIO API to control the SCL and SDA lines.
+config I2C_HIGHLANDER
+ tristate "Highlander FPGA SMBus interface"
+ depends on SH_HIGHLANDER
+ help
+ If you say yes to this option, support will be included for
+ the SMBus interface located in the FPGA on various Highlander
+ boards, particularly the R0P7780LC0011RL and R0P7785LC0011RL
+ FPGAs. This is wholly unrelated to the SoC I2C.
+
+ This driver can also be built as a module. If so, the module
+ will be called i2c-highlander.
+
config I2C_IBM_IIC
tristate "IBM PPC 4xx on-chip I2C interface"
depends on 4xx
diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
index 97dbfa2107fe..0c2c4b26cdf1 100644
--- a/drivers/i2c/busses/Makefile
+++ b/drivers/i2c/busses/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o
obj-$(CONFIG_I2C_CPM) += i2c-cpm.o
obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o
obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o
+obj-$(CONFIG_I2C_HIGHLANDER) += i2c-highlander.o
obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o
obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o
obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o
diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c
new file mode 100644
index 000000000000..f4d22ae9d294
--- /dev/null
+++ b/drivers/i2c/busses/i2c-highlander.c
@@ -0,0 +1,498 @@
+/*
+ * Renesas Solutions Highlander FPGA I2C/SMBus support.
+ *
+ * Supported devices: R0P7780LC0011RL, R0P7785LC0011RL
+ *
+ * Copyright (C) 2008 Paul Mundt
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ * Copyright (C) 2008 Atom Create Engineering Co., Ltd.
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License version 2. See the file "COPYING" in the main directory
+ * of this archive for more details.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/completion.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+
+#define SMCR 0x00
+#define SMCR_START (1 << 0)
+#define SMCR_IRIC (1 << 1)
+#define SMCR_BBSY (1 << 2)
+#define SMCR_ACKE (1 << 3)
+#define SMCR_RST (1 << 4)
+#define SMCR_IEIC (1 << 6)
+
+#define SMSMADR 0x02
+
+#define SMMR 0x04
+#define SMMR_MODE0 (1 << 0)
+#define SMMR_MODE1 (1 << 1)
+#define SMMR_CAP (1 << 3)
+#define SMMR_TMMD (1 << 4)
+#define SMMR_SP (1 << 7)
+
+#define SMSADR 0x06
+#define SMTRDR 0x46
+
+struct highlander_i2c_dev {
+ struct device *dev;
+ void __iomem *base;
+ struct i2c_adapter adapter;
+ struct completion cmd_complete;
+ unsigned long last_read_time;
+ int irq;
+ u8 *buf;
+ size_t buf_len;
+};
+
+static int iic_force_poll, iic_force_normal;
+static int iic_timeout = 1000, iic_read_delay;
+
+static inline void highlander_i2c_irq_enable(struct highlander_i2c_dev *dev)
+{
+ iowrite16(ioread16(dev->base + SMCR) | SMCR_IEIC, dev->base + SMCR);
+}
+
+static inline void highlander_i2c_irq_disable(struct highlander_i2c_dev *dev)
+{
+ iowrite16(ioread16(dev->base + SMCR) & ~SMCR_IEIC, dev->base + SMCR);
+}
+
+static inline void highlander_i2c_start(struct highlander_i2c_dev *dev)
+{
+ iowrite16(ioread16(dev->base + SMCR) | SMCR_START, dev->base + SMCR);
+}
+
+static inline void highlander_i2c_done(struct highlander_i2c_dev *dev)
+{
+ iowrite16(ioread16(dev->base + SMCR) | SMCR_IRIC, dev->base + SMCR);
+}
+
+static void highlander_i2c_setup(struct highlander_i2c_dev *dev)
+{
+ u16 smmr;
+
+ smmr = ioread16(dev->base + SMMR);
+ smmr |= SMMR_TMMD;
+
+ if (iic_force_normal)
+ smmr &= ~SMMR_SP;
+ else
+ smmr |= SMMR_SP;
+
+ iowrite16(smmr, dev->base + SMMR);
+}
+
+static void smbus_write_data(u8 *src, u16 *dst, int len)
+{
+ for (; len > 1; len -= 2) {
+ *dst++ = be16_to_cpup((u16 *)src);
+ src += 2;
+ }
+
+ if (len)
+ *dst = *src << 8;
+}
+
+static void smbus_read_data(u16 *src, u8 *dst, int len)
+{
+ for (; len > 1; len -= 2) {
+ *(u16 *)dst = cpu_to_be16p(src++);
+ dst += 2;
+ }
+
+ if (len)
+ *dst = *src >> 8;
+}
+
+static void highlander_i2c_command(struct highlander_i2c_dev *dev,
+ u8 command, int len)
+{
+ unsigned int i;
+ u16 cmd = (command << 8) | command;
+
+ for (i = 0; i < len; i += 2) {
+ if (len - i == 1)
+ cmd = command << 8;
+ iowrite16(cmd, dev->base + SMSADR + i);
+ dev_dbg(dev->dev, "command data[%x] 0x%04x\n", i/2, cmd);
+ }
+}
+
+static int highlander_i2c_wait_for_bbsy(struct highlander_i2c_dev *dev)
+{
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(iic_timeout);
+ while (ioread16(dev->base + SMCR) & SMCR_BBSY) {
+ if (time_after(jiffies, timeout)) {
+ dev_warn(dev->dev, "timeout waiting for bus ready\n");
+ return -ETIMEDOUT;
+ }
+
+ msleep(1);
+ }
+
+ return 0;
+}
+
+static int highlander_i2c_reset(struct highlander_i2c_dev *dev)
+{
+ iowrite16(ioread16(dev->base + SMCR) | SMCR_RST, dev->base + SMCR);
+ return highlander_i2c_wait_for_bbsy(dev);
+}
+
+static int highlander_i2c_wait_for_ack(struct highlander_i2c_dev *dev)
+{
+ u16 tmp = ioread16(dev->base + SMCR);
+
+ if ((tmp & (SMCR_IRIC | SMCR_ACKE)) == SMCR_ACKE) {
+ dev_warn(dev->dev, "ack abnormality\n");
+ return highlander_i2c_reset(dev);
+ }
+
+ return 0;
+}
+
+static irqreturn_t highlander_i2c_irq(int irq, void *dev_id)
+{
+ struct highlander_i2c_dev *dev = dev_id;
+
+ highlander_i2c_done(dev);
+ complete(&dev->cmd_complete);
+
+ return IRQ_HANDLED;
+}
+
+static void highlander_i2c_poll(struct highlander_i2c_dev *dev)
+{
+ unsigned long timeout;
+ u16 smcr;
+
+ timeout = jiffies + msecs_to_jiffies(iic_timeout);
+ for (;;) {
+ smcr = ioread16(dev->base + SMCR);
+
+ /*
+ * Don't bother checking ACKE here, this and the reset
+ * are handled in highlander_i2c_wait_xfer_done() when
+ * waiting for the ACK.
+ */
+
+ if (smcr & SMCR_IRIC)
+ return;
+ if (time_after(jiffies, timeout))
+ break;
+
+ cpu_relax();
+ cond_resched();
+ }
+
+ dev_err(dev->dev, "polling timed out\n");
+}
+
+static inline int highlander_i2c_wait_xfer_done(struct highlander_i2c_dev *dev)
+{
+ if (dev->irq)
+ wait_for_completion_timeout(&dev->cmd_complete,
+ msecs_to_jiffies(iic_timeout));
+ else
+ /* busy looping, the IRQ of champions */
+ highlander_i2c_poll(dev);
+
+ return highlander_i2c_wait_for_ack(dev);
+}
+
+static int highlander_i2c_read(struct highlander_i2c_dev *dev)
+{
+ int i, cnt;
+ u16 data[16];
+
+ if (highlander_i2c_wait_for_bbsy(dev))
+ return -EAGAIN;
+
+ highlander_i2c_start(dev);
+
+ if (highlander_i2c_wait_xfer_done(dev)) {
+ dev_err(dev->dev, "Arbitration loss\n");
+ return -EAGAIN;
+ }
+
+ /*
+ * The R0P7780LC0011RL FPGA needs a significant delay between
+ * data read cycles, otherwise the transciever gets confused and
+ * garbage is returned when the read is subsequently aborted.
+ *
+ * It is not sufficient to wait for BBSY.
+ *
+ * While this generally only applies to the older SH7780-based
+ * Highlanders, the same issue can be observed on SH7785 ones,
+ * albeit less frequently. SH7780-based Highlanders may need
+ * this to be as high as 1000 ms.
+ */
+ if (iic_read_delay && time_before(jiffies, dev->last_read_time +
+ msecs_to_jiffies(iic_read_delay)))
+ msleep(jiffies_to_msecs((dev->last_read_time +
+ msecs_to_jiffies(iic_read_delay)) - jiffies));
+
+ cnt = (dev->buf_len + 1) >> 1;
+ for (i = 0; i < cnt; i++) {
+ data[i] = ioread16(dev->base + SMTRDR + (i * sizeof(u16)));
+ dev_dbg(dev->dev, "read data[%x] 0x%04x\n", i, data[i]);
+ }
+
+ smbus_read_data(data, dev->buf, dev->buf_len);
+
+ dev->last_read_time = jiffies;
+
+ return 0;
+}
+
+static int highlander_i2c_write(struct highlander_i2c_dev *dev)
+{
+ int i, cnt;
+ u16 data[16];
+
+ smbus_write_data(dev->buf, data, dev->buf_len);
+
+ cnt = (dev->buf_len + 1) >> 1;
+ for (i = 0; i < cnt; i++) {
+ iowrite16(data[i], dev->base + SMTRDR + (i * sizeof(u16)));
+ dev_dbg(dev->dev, "write data[%x] 0x%04x\n", i, data[i]);
+ }
+
+ if (highlander_i2c_wait_for_bbsy(dev))
+ return -EAGAIN;
+
+ highlander_i2c_start(dev);
+
+ return highlander_i2c_wait_xfer_done(dev);
+}
+
+static int highlander_i2c_smbus_xfer(struct i2c_adapter *adap, u16 addr,
+ unsigned short flags, char read_write,
+ u8 command, int size,
+ union i2c_smbus_data *data)
+{
+ struct highlander_i2c_dev *dev = i2c_get_adapdata(adap);
+ int read = read_write & I2C_SMBUS_READ;
+ u16 tmp;
+
+ init_completion(&dev->cmd_complete);
+
+ dev_dbg(dev->dev, "addr %04x, command %02x, read_write %d, size %d\n",
+ addr, command, read_write, size);
+
+ /*
+ * Set up the buffer and transfer size
+ */
+ switch (size) {
+ case I2C_SMBUS_BYTE_DATA:
+ dev->buf = &data->byte;
+ dev->buf_len = 1;
+ break;
+ case I2C_SMBUS_I2C_BLOCK_DATA:
+ dev->buf = &data->block[1];
+ dev->buf_len = data->block[0];
+ break;
+ default:
+ dev_err(dev->dev, "unsupported command %d\n", size);
+ return -EINVAL;
+ }
+
+ /*
+ * Encode the mode setting
+ */
+ tmp = ioread16(dev->base + SMMR);
+ tmp &= ~(SMMR_MODE0 | SMMR_MODE1);
+
+ switch (dev->buf_len) {
+ case 1:
+ /* default */
+ break;
+ case 8:
+ tmp |= SMMR_MODE0;
+ break;
+ case 16:
+ tmp |= SMMR_MODE1;
+ break;
+ case 32:
+ tmp |= (SMMR_MODE0 | SMMR_MODE1);
+ break;
+ default:
+ dev_err(dev->dev, "unsupported xfer size %d\n", dev->buf_len);
+ return -EINVAL;
+ }
+
+ iowrite16(tmp, dev->base + SMMR);
+
+ /* Ensure we're in a sane state */
+ highlander_i2c_done(dev);
+
+ /* Set slave address */
+ iowrite16((addr << 1) | read, dev->base + SMSMADR);
+
+ highlander_i2c_command(dev, command, dev->buf_len);
+
+ if (read)
+ return highlander_i2c_read(dev);
+ else
+ return highlander_i2c_write(dev);
+}
+
+static u32 highlander_i2c_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK;
+}
+
+static const struct i2c_algorithm highlander_i2c_algo = {
+ .smbus_xfer = highlander_i2c_smbus_xfer,
+ .functionality = highlander_i2c_func,
+};
+
+static int __devinit highlander_i2c_probe(struct platform_device *pdev)
+{
+ struct highlander_i2c_dev *dev;
+ struct i2c_adapter *adap;
+ struct resource *res;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (unlikely(!res)) {
+ dev_err(&pdev->dev, "no mem resource\n");
+ return -ENODEV;
+ }
+
+ dev = kzalloc(sizeof(struct highlander_i2c_dev), GFP_KERNEL);
+ if (unlikely(!dev))
+ return -ENOMEM;
+
+ dev->base = ioremap_nocache(res->start, res->end - res->start + 1);
+ if (unlikely(!dev->base)) {
+ ret = -ENXIO;
+ goto err;
+ }
+
+ dev->dev = &pdev->dev;
+ platform_set_drvdata(pdev, dev);
+
+ dev->irq = platform_get_irq(pdev, 0);
+ if (iic_force_poll)
+ dev->irq = 0;
+
+ if (dev->irq) {
+ ret = request_irq(dev->irq, highlander_i2c_irq, IRQF_DISABLED,
+ pdev->name, dev);
+ if (unlikely(ret))
+ goto err_unmap;
+
+ highlander_i2c_irq_enable(dev);
+ } else {
+ dev_notice(&pdev->dev, "no IRQ, using polling mode\n");
+ highlander_i2c_irq_disable(dev);
+ }
+
+ dev->last_read_time = jiffies; /* initial read jiffies */
+
+ highlander_i2c_setup(dev);
+
+ adap = &dev->adapter;
+ i2c_set_adapdata(adap, dev);
+ adap->owner = THIS_MODULE;
+ adap->class = I2C_CLASS_HWMON;
+ strlcpy(adap->name, "HL FPGA I2C adapter", sizeof(adap->name));
+ adap->algo = &highlander_i2c_algo;
+ adap->dev.parent = &pdev->dev;
+ adap->nr = pdev->id;
+
+ /*
+ * Reset the adapter
+ */
+ ret = highlander_i2c_reset(dev);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev, "controller didn't come up\n");
+ goto err_free_irq;
+ }
+
+ ret = i2c_add_numbered_adapter(adap);
+ if (unlikely(ret)) {
+ dev_err(&pdev->dev, "failure adding adapter\n");
+ goto err_free_irq;
+ }
+
+ return 0;
+
+err_free_irq:
+ if (dev->irq)
+ free_irq(dev->irq, dev);
+err_unmap:
+ iounmap(dev->base);
+err:
+ kfree(dev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return ret;
+}
+
+static int __devexit highlander_i2c_remove(struct platform_device *pdev)
+{
+ struct highlander_i2c_dev *dev = platform_get_drvdata(pdev);
+
+ i2c_del_adapter(&dev->adapter);
+
+ if (dev->irq)
+ free_irq(dev->irq, dev);
+
+ iounmap(dev->base);
+ kfree(dev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver highlander_i2c_driver = {
+ .driver = {
+ .name = "i2c-highlander",
+ .owner = THIS_MODULE,
+ },
+
+ .probe = highlander_i2c_probe,
+ .remove = __devexit_p(highlander_i2c_remove),
+};
+
+static int __init highlander_i2c_init(void)
+{
+ return platform_driver_register(&highlander_i2c_driver);
+}
+
+static void __exit highlander_i2c_exit(void)
+{
+ platform_driver_unregister(&highlander_i2c_driver);
+}
+
+module_init(highlander_i2c_init);
+module_exit(highlander_i2c_exit);
+
+MODULE_AUTHOR("Paul Mundt");
+MODULE_DESCRIPTION("Renesas Highlander FPGA I2C/SMBus adapter");
+MODULE_LICENSE("GPL v2");
+
+module_param(iic_force_poll, bool, 0);
+module_param(iic_force_normal, bool, 0);
+module_param(iic_timeout, int, 0);
+module_param(iic_read_delay, int, 0);
+
+MODULE_PARM_DESC(iic_force_poll, "Force polling mode");
+MODULE_PARM_DESC(iic_force_normal,
+ "Force normal mode (100 kHz), default is fast mode (400 kHz)");
+MODULE_PARM_DESC(iic_timeout, "Set timeout value in msecs (default 1000 ms)");
+MODULE_PARM_DESC(iic_read_delay,
+ "Delay between data read cycles (default 0 ms)");
diff --git a/drivers/i2c/busses/i2c-parport-light.c b/drivers/i2c/busses/i2c-parport-light.c
index c6faf9bdad18..b2b8380f6602 100644
--- a/drivers/i2c/busses/i2c-parport-light.c
+++ b/drivers/i2c/busses/i2c-parport-light.c
@@ -123,11 +123,6 @@ static struct i2c_adapter parport_adapter = {
static int __devinit i2c_parport_probe(struct platform_device *pdev)
{
int err;
- struct resource *res;
-
- res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (!request_region(res->start, res->end - res->start + 1, DRVNAME))
- return -EBUSY;
/* Reset hardware to a sane state (SCL and SDA high) */
parport_setsda(NULL, 1);
@@ -138,29 +133,19 @@ static int __devinit i2c_parport_probe(struct platform_device *pdev)
parport_adapter.dev.parent = &pdev->dev;
err = i2c_bit_add_bus(&parport_adapter);
- if (err) {
+ if (err)
dev_err(&pdev->dev, "Unable to register with I2C\n");
- goto exit_region;
- }
- return 0;
-
-exit_region:
- release_region(res->start, res->end - res->start + 1);
return err;
}
static int __devexit i2c_parport_remove(struct platform_device *pdev)
{
- struct resource *res;
-
i2c_del_adapter(&parport_adapter);
/* Un-init if needed (power off...) */
if (adapter_parm[type].init.val)
line_set(0, &adapter_parm[type].init);
- res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- release_region(res->start, res->end - res->start + 1);
return 0;
}
@@ -175,12 +160,6 @@ static struct platform_driver i2c_parport_driver = {
static int __init i2c_parport_device_add(u16 address)
{
- struct resource res = {
- .start = address,
- .end = address + 2,
- .name = DRVNAME,
- .flags = IORESOURCE_IO,
- };
int err;
pdev = platform_device_alloc(DRVNAME, -1);
@@ -190,13 +169,6 @@ static int __init i2c_parport_device_add(u16 address)
goto exit;
}
- err = platform_device_add_resources(pdev, &res, 1);
- if (err) {
- printk(KERN_ERR DRVNAME ": Device resource addition failed "
- "(%d)\n", err);
- goto exit_device_put;
- }
-
err = platform_device_add(pdev);
if (err) {
printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
@@ -231,13 +203,16 @@ static int __init i2c_parport_init(void)
base = DEFAULT_BASE;
}
+ if (!request_region(base, 3, DRVNAME))
+ return -EBUSY;
+
if (!adapter_parm[type].getscl.val)
parport_algo_data.getscl = NULL;
/* Sets global pdev as a side effect */
err = i2c_parport_device_add(base);
if (err)
- goto exit;
+ goto exit_release;
err = platform_driver_register(&i2c_parport_driver);
if (err)
@@ -247,7 +222,8 @@ static int __init i2c_parport_init(void)
exit_device:
platform_device_unregister(pdev);
-exit:
+exit_release:
+ release_region(base, 3);
return err;
}
@@ -255,6 +231,7 @@ static void __exit i2c_parport_exit(void)
{
platform_driver_unregister(&i2c_parport_driver);
platform_device_unregister(pdev);
+ release_region(base, 3);
}
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
diff --git a/drivers/i2c/busses/i2c-pca-isa.c b/drivers/i2c/busses/i2c-pca-isa.c
index a119784bae10..f80df9ae5054 100644
--- a/drivers/i2c/busses/i2c-pca-isa.c
+++ b/drivers/i2c/busses/i2c-pca-isa.c
@@ -36,8 +36,8 @@
#define DRIVER "i2c-pca-isa"
#define IO_SIZE 4
-static unsigned long base = 0x330;
-static int irq = 10;
+static unsigned long base;
+static int irq = -1;
/* Data sheet recommends 59kHz for 100kHz operation due to variation
* in the actual clock rate */
@@ -107,6 +107,19 @@ static struct i2c_adapter pca_isa_ops = {
.timeout = 100,
};
+static int __devinit pca_isa_match(struct device *dev, unsigned int id)
+{
+ int match = base != 0;
+
+ if (match) {
+ if (irq <= -1)
+ dev_warn(dev, "Using polling mode (specify irq)\n");
+ } else
+ dev_err(dev, "Please specify I/O base\n");
+
+ return match;
+}
+
static int __devinit pca_isa_probe(struct device *dev, unsigned int id)
{
init_waitqueue_head(&pca_wait);
@@ -153,7 +166,7 @@ static int __devexit pca_isa_remove(struct device *dev, unsigned int id)
{
i2c_del_adapter(&pca_isa_ops);
- if (irq > 0) {
+ if (irq > -1) {
disable_irq(irq);
free_irq(irq, &pca_isa_ops);
}
@@ -163,6 +176,7 @@ static int __devexit pca_isa_remove(struct device *dev, unsigned int id)
}
static struct isa_driver pca_isa_driver = {
+ .match = pca_isa_match,
.probe = pca_isa_probe,
.remove = __devexit_p(pca_isa_remove),
.driver = {
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index 862eb352a2d9..73dc52e114eb 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -36,6 +36,7 @@
VT8237S 0x3372 yes
VT8251 0x3287 yes
CX700 0x8324 yes
+ VX800/VX820 0x8353 yes
Note: we assume there can only be one device, with one SMBus interface.
*/
@@ -82,6 +83,7 @@ static unsigned short SMBHSTCFG = 0xD2;
#define VT596_BYTE 0x04
#define VT596_BYTE_DATA 0x08
#define VT596_WORD_DATA 0x0C
+#define VT596_PROC_CALL 0x10
#define VT596_BLOCK_DATA 0x14
#define VT596_I2C_BLOCK_DATA 0x34
@@ -232,6 +234,12 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
}
size = VT596_WORD_DATA;
break;
+ case I2C_SMBUS_PROC_CALL:
+ outb_p(command, SMBHSTCMD);
+ outb_p(data->word & 0xff, SMBHSTDAT0);
+ outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
+ size = VT596_PROC_CALL;
+ break;
case I2C_SMBUS_I2C_BLOCK_DATA:
if (!(vt596_features & FEATURE_I2CBLOCK))
goto exit_unsupported;
@@ -262,6 +270,9 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
if (status)
return status;
+ if (size == VT596_PROC_CALL)
+ read_write = I2C_SMBUS_READ;
+
if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))
return 0;
@@ -271,6 +282,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
data->byte = inb_p(SMBHSTDAT0);
break;
case VT596_WORD_DATA:
+ case VT596_PROC_CALL:
data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
break;
case VT596_I2C_BLOCK_DATA:
@@ -295,7 +307,7 @@ static u32 vt596_func(struct i2c_adapter *adapter)
{
u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
- I2C_FUNC_SMBUS_BLOCK_DATA;
+ I2C_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA;
if (vt596_features & FEATURE_I2CBLOCK)
func |= I2C_FUNC_SMBUS_I2C_BLOCK;
@@ -396,6 +408,7 @@ found:
switch (pdev->device) {
case PCI_DEVICE_ID_VIA_CX700:
+ case PCI_DEVICE_ID_VIA_VX800:
case PCI_DEVICE_ID_VIA_8251:
case PCI_DEVICE_ID_VIA_8237:
case PCI_DEVICE_ID_VIA_8237A:
@@ -459,6 +472,8 @@ static struct pci_device_id vt596_ids[] = {
.driver_data = SMBBA3 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_CX700),
.driver_data = SMBBA3 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX800),
+ .driver_data = SMBBA3 },
{ 0, }
};
diff --git a/drivers/i2c/chips/isp1301_omap.c b/drivers/i2c/chips/isp1301_omap.c
index 4655b794ebe3..28902ebd5539 100644
--- a/drivers/i2c/chips/isp1301_omap.c
+++ b/drivers/i2c/chips/isp1301_omap.c
@@ -49,10 +49,9 @@ MODULE_LICENSE("GPL");
struct isp1301 {
struct otg_transceiver otg;
- struct i2c_client client;
+ struct i2c_client *client;
void (*i2c_release)(struct device *dev);
- int irq;
int irq_type;
u32 last_otg_ctrl;
@@ -138,14 +137,6 @@ static inline void notresponding(struct isp1301 *isp)
/*-------------------------------------------------------------------------*/
-/* only two addresses possible */
-#define ISP_BASE 0x2c
-static unsigned short normal_i2c[] = {
- ISP_BASE, ISP_BASE + 1,
- I2C_CLIENT_END };
-
-I2C_CLIENT_INSMOD;
-
static struct i2c_driver isp1301_driver;
/* smbus apis are used for portability */
@@ -153,25 +144,25 @@ static struct i2c_driver isp1301_driver;
static inline u8
isp1301_get_u8(struct isp1301 *isp, u8 reg)
{
- return i2c_smbus_read_byte_data(&isp->client, reg + 0);
+ return i2c_smbus_read_byte_data(isp->client, reg + 0);
}
static inline int
isp1301_get_u16(struct isp1301 *isp, u8 reg)
{
- return i2c_smbus_read_word_data(&isp->client, reg);
+ return i2c_smbus_read_word_data(isp->client, reg);
}
static inline int
isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
{
- return i2c_smbus_write_byte_data(&isp->client, reg + 0, bits);
+ return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
}
static inline int
isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
{
- return i2c_smbus_write_byte_data(&isp->client, reg + 1, bits);
+ return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
}
/*-------------------------------------------------------------------------*/
@@ -349,10 +340,10 @@ isp1301_defer_work(struct isp1301 *isp, int work)
int status;
if (isp && !test_and_set_bit(work, &isp->todo)) {
- (void) get_device(&isp->client.dev);
+ (void) get_device(&isp->client->dev);
status = schedule_work(&isp->work);
if (!status && !isp->working)
- dev_vdbg(&isp->client.dev,
+ dev_vdbg(&isp->client->dev,
"work item %d may be lost\n", work);
}
}
@@ -1135,7 +1126,7 @@ isp1301_work(struct work_struct *work)
/* transfer state from otg engine to isp1301 */
if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
otg_update_isp(isp);
- put_device(&isp->client.dev);
+ put_device(&isp->client->dev);
}
#endif
/* transfer state from isp1301 to otg engine */
@@ -1143,7 +1134,7 @@ isp1301_work(struct work_struct *work)
u8 stat = isp1301_clear_latch(isp);
isp_update_otg(isp, stat);
- put_device(&isp->client.dev);
+ put_device(&isp->client->dev);
}
if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
@@ -1178,7 +1169,7 @@ isp1301_work(struct work_struct *work)
}
host_resume(isp);
// mdelay(10);
- put_device(&isp->client.dev);
+ put_device(&isp->client->dev);
}
if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
@@ -1187,15 +1178,15 @@ isp1301_work(struct work_struct *work)
if (!stop)
mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
#endif
- put_device(&isp->client.dev);
+ put_device(&isp->client->dev);
}
if (isp->todo)
- dev_vdbg(&isp->client.dev,
+ dev_vdbg(&isp->client->dev,
"work done, todo = 0x%lx\n",
isp->todo);
if (stop) {
- dev_dbg(&isp->client.dev, "stop\n");
+ dev_dbg(&isp->client->dev, "stop\n");
break;
}
} while (isp->todo);
@@ -1219,7 +1210,7 @@ static void isp1301_release(struct device *dev)
{
struct isp1301 *isp;
- isp = container_of(dev, struct isp1301, client.dev);
+ isp = dev_get_drvdata(dev);
/* ugly -- i2c hijacks our memory hook to wait_for_completion() */
if (isp->i2c_release)
@@ -1229,15 +1220,15 @@ static void isp1301_release(struct device *dev)
static struct isp1301 *the_transceiver;
-static int isp1301_detach_client(struct i2c_client *i2c)
+static int __exit isp1301_remove(struct i2c_client *i2c)
{
struct isp1301 *isp;
- isp = container_of(i2c, struct isp1301, client);
+ isp = i2c_get_clientdata(i2c);
isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
- free_irq(isp->irq, isp);
+ free_irq(i2c->irq, isp);
#ifdef CONFIG_USB_OTG
otg_unbind(isp);
#endif
@@ -1252,7 +1243,7 @@ static int isp1301_detach_client(struct i2c_client *i2c)
put_device(&i2c->dev);
the_transceiver = 0;
- return i2c_detach_client(i2c);
+ return 0;
}
/*-------------------------------------------------------------------------*/
@@ -1285,7 +1276,7 @@ static int isp1301_otg_enable(struct isp1301 *isp)
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
- dev_info(&isp->client.dev, "ready for dual-role USB ...\n");
+ dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
return 0;
}
@@ -1310,7 +1301,7 @@ isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
#ifdef CONFIG_USB_OTG
isp->otg.host = host;
- dev_dbg(&isp->client.dev, "registered host\n");
+ dev_dbg(&isp->client->dev, "registered host\n");
host_suspend(isp);
if (isp->otg.gadget)
return isp1301_otg_enable(isp);
@@ -1325,7 +1316,7 @@ isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
if (machine_is_omap_h2())
isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
- dev_info(&isp->client.dev, "A-Host sessions ok\n");
+ dev_info(&isp->client->dev, "A-Host sessions ok\n");
isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
INTR_ID_GND);
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
@@ -1343,7 +1334,7 @@ isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host)
return 0;
#else
- dev_dbg(&isp->client.dev, "host sessions not allowed\n");
+ dev_dbg(&isp->client->dev, "host sessions not allowed\n");
return -EINVAL;
#endif
@@ -1370,7 +1361,7 @@ isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
#ifdef CONFIG_USB_OTG
isp->otg.gadget = gadget;
- dev_dbg(&isp->client.dev, "registered gadget\n");
+ dev_dbg(&isp->client->dev, "registered gadget\n");
/* gadget driver may be suspended until vbus_connect () */
if (isp->otg.host)
return isp1301_otg_enable(isp);
@@ -1395,7 +1386,7 @@ isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
INTR_SESS_VLD);
isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
INTR_VBUS_VLD);
- dev_info(&isp->client.dev, "B-Peripheral sessions ok\n");
+ dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
dump_regs(isp, __func__);
/* If this has a Mini-AB connector, this mode is highly
@@ -1408,7 +1399,7 @@ isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget)
return 0;
#else
- dev_dbg(&isp->client.dev, "peripheral sessions not allowed\n");
+ dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
return -EINVAL;
#endif
}
@@ -1508,12 +1499,10 @@ isp1301_start_hnp(struct otg_transceiver *dev)
/*-------------------------------------------------------------------------*/
-/* no error returns, they'd just make bus scanning stop */
-static int isp1301_probe(struct i2c_adapter *bus, int address, int kind)
+static int __init isp1301_probe(struct i2c_client *i2c)
{
int status;
struct isp1301 *isp;
- struct i2c_client *i2c;
if (the_transceiver)
return 0;
@@ -1527,37 +1516,19 @@ static int isp1301_probe(struct i2c_adapter *bus, int address, int kind)
isp->timer.function = isp1301_timer;
isp->timer.data = (unsigned long) isp;
- isp->irq = -1;
- isp->client.addr = address;
- i2c_set_clientdata(&isp->client, isp);
- isp->client.adapter = bus;
- isp->client.driver = &isp1301_driver;
- strlcpy(isp->client.name, DRIVER_NAME, I2C_NAME_SIZE);
- i2c = &isp->client;
-
- /* if this is a true probe, verify the chip ... */
- if (kind < 0) {
- status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
- if (status != I2C_VENDOR_ID_PHILIPS) {
- dev_dbg(&bus->dev, "addr %d not philips id: %d\n",
- address, status);
- goto fail1;
- }
- status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
- if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
- dev_dbg(&bus->dev, "%d not isp1301, %d\n",
- address, status);
- goto fail1;
- }
- }
+ i2c_set_clientdata(i2c, isp);
+ isp->client = i2c;
- status = i2c_attach_client(i2c);
- if (status < 0) {
- dev_dbg(&bus->dev, "can't attach %s to device %d, err %d\n",
- DRIVER_NAME, address, status);
-fail1:
- kfree(isp);
- return 0;
+ /* verify the chip (shouldn't be necesary) */
+ status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
+ if (status != I2C_VENDOR_ID_PHILIPS) {
+ dev_dbg(&i2c->dev, "not philips id: %d\n", status);
+ goto fail;
+ }
+ status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
+ if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
+ dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
+ goto fail;
}
isp->i2c_release = i2c->dev.release;
i2c->dev.release = isp1301_release;
@@ -1586,7 +1557,7 @@ fail1:
status = otg_bind(isp);
if (status < 0) {
dev_dbg(&i2c->dev, "can't bind OTG\n");
- goto fail2;
+ goto fail;
}
#endif
@@ -1599,26 +1570,21 @@ fail1:
/* IRQ wired at M14 */
omap_cfg_reg(M14_1510_GPIO2);
- isp->irq = OMAP_GPIO_IRQ(2);
if (gpio_request(2, "isp1301") == 0)
gpio_direction_input(2);
isp->irq_type = IRQF_TRIGGER_FALLING;
}
isp->irq_type |= IRQF_SAMPLE_RANDOM;
- status = request_irq(isp->irq, isp1301_irq,
+ status = request_irq(i2c->irq, isp1301_irq,
isp->irq_type, DRIVER_NAME, isp);
if (status < 0) {
dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
- isp->irq, status);
-#ifdef CONFIG_USB_OTG
-fail2:
-#endif
- i2c_detach_client(i2c);
- goto fail1;
+ i2c->irq, status);
+ goto fail;
}
- isp->otg.dev = &isp->client.dev;
+ isp->otg.dev = &i2c->dev;
isp->otg.label = DRIVER_NAME;
isp->otg.set_host = isp1301_set_host,
@@ -1649,22 +1615,25 @@ fail2:
status);
return 0;
-}
-static int isp1301_scan_bus(struct i2c_adapter *bus)
-{
- if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA
- | I2C_FUNC_SMBUS_READ_WORD_DATA))
- return -EINVAL;
- return i2c_probe(bus, &addr_data, isp1301_probe);
+fail:
+ kfree(isp);
+ return -ENODEV;
}
+static const struct i2c_device_id isp1301_id[] = {
+ { "isp1301_omap", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, isp1301_id);
+
static struct i2c_driver isp1301_driver = {
.driver = {
.name = "isp1301_omap",
},
- .attach_adapter = isp1301_scan_bus,
- .detach_client = isp1301_detach_client,
+ .probe = isp1301_probe,
+ .remove = __exit_p(isp1301_remove),
+ .id_table = isp1301_id,
};
/*-------------------------------------------------------------------------*/
diff --git a/drivers/i2c/chips/tps65010.c b/drivers/i2c/chips/tps65010.c
index cf02e8fceb42..acf8b9d5f575 100644
--- a/drivers/i2c/chips/tps65010.c
+++ b/drivers/i2c/chips/tps65010.c
@@ -456,14 +456,17 @@ static irqreturn_t tps65010_irq(int irq, void *_tps)
/* offsets 0..3 == GPIO1..GPIO4
* offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
+ * offset 6 == vibrator motor driver
*/
static void
tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
if (offset < 4)
tps65010_set_gpio_out_value(offset + 1, value);
- else
+ else if (offset < 6)
tps65010_set_led(offset - 3, value ? ON : OFF);
+ else
+ tps65010_set_vib(value);
}
static int
@@ -477,8 +480,10 @@ tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
if (!(tps->outmask & (1 << offset)))
return -EINVAL;
tps65010_set_gpio_out_value(offset + 1, value);
- } else
+ } else if (offset < 6)
tps65010_set_led(offset - 3, value ? ON : OFF);
+ else
+ tps65010_set_vib(value);
return 0;
}
@@ -646,7 +651,7 @@ static int tps65010_probe(struct i2c_client *client,
tps->chip.get = tps65010_gpio_get;
tps->chip.base = board->base;
- tps->chip.ngpio = 6;
+ tps->chip.ngpio = 7;
tps->chip.can_sleep = 1;
status = gpiochip_add(&tps->chip);
@@ -675,6 +680,7 @@ static const struct i2c_device_id tps65010_id[] = {
{ "tps65011", TPS65011 },
{ "tps65012", TPS65012 },
{ "tps65013", TPS65013 },
+ { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */
{ }
};
MODULE_DEVICE_TABLE(i2c, tps65010_id);
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index b346a687ab59..42e852d79ffa 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -437,6 +437,10 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
{
int res = 0, dummy;
+ /* Can't register until after driver model init */
+ if (unlikely(WARN_ON(!i2c_bus_type.p)))
+ return -EAGAIN;
+
mutex_init(&adap->bus_lock);
mutex_init(&adap->clist_lock);
INIT_LIST_HEAD(&adap->clients);
@@ -696,6 +700,10 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
{
int res;
+ /* Can't register until after driver model init */
+ if (unlikely(WARN_ON(!i2c_bus_type.p)))
+ return -EAGAIN;
+
/* new style driver methods can't mix with legacy ones */
if (is_newstyle_driver(driver)) {
if (driver->attach_adapter || driver->detach_adapter
@@ -978,7 +986,10 @@ static void __exit i2c_exit(void)
bus_unregister(&i2c_bus_type);
}
-subsys_initcall(i2c_init);
+/* We must initialize early, because some subsystems register i2c drivers
+ * in subsys_initcall() code, but are linked (and initialized) before i2c.
+ */
+postcore_initcall(i2c_init);
module_exit(i2c_exit);
/* ----------------------------------------------------
@@ -1677,6 +1688,28 @@ s32 i2c_smbus_write_word_data(struct i2c_client *client, u8 command, u16 value)
EXPORT_SYMBOL(i2c_smbus_write_word_data);
/**
+ * i2c_smbus_process_call - SMBus "process call" protocol
+ * @client: Handle to slave device
+ * @command: Byte interpreted by slave
+ * @value: 16-bit "word" being written
+ *
+ * This executes the SMBus "process call" protocol, returning negative errno
+ * else a 16-bit unsigned "word" received from the device.
+ */
+s32 i2c_smbus_process_call(struct i2c_client *client, u8 command, u16 value)
+{
+ union i2c_smbus_data data;
+ int status;
+ data.word = value;
+
+ status = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+ I2C_SMBUS_WRITE, command,
+ I2C_SMBUS_PROC_CALL, &data);
+ return (status < 0) ? status : data.word;
+}
+EXPORT_SYMBOL(i2c_smbus_process_call);
+
+/**
* i2c_smbus_read_block_data - SMBus "block read" protocol
* @client: Handle to slave device
* @command: Byte interpreted by slave
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 03:25:49 +0000