diff options
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/busses/Kconfig | 4 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-at91.c | 36 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-davinci.c | 8 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-designware-core.c | 3 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 9 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-ismt.c | 3 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-mxs.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-omap.c | 13 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-piix4.c | 3 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-rcar.c | 9 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-s3c2410.c | 2 | ||||
-rw-r--r-- | drivers/i2c/i2c-core.c | 187 | ||||
-rw-r--r-- | drivers/i2c/i2c-mux.c | 3 | ||||
-rw-r--r-- | drivers/i2c/muxes/i2c-mux-gpio.c | 8 |
14 files changed, 259 insertions, 31 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 631736e2e7ed..d4fe13ee543e 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -108,6 +108,9 @@ config I2C_I801 Lynx Point-LP (PCH) Avoton (SOC) Wellsburg (PCH) + Coleto Creek (PCH) + Wildcat Point-LP (PCH) + BayTrail (SOC) This driver can also be built as a module. If so, the module will be called i2c-i801. @@ -150,6 +153,7 @@ config I2C_PIIX4 ATI SB700/SP5100 ATI SB800 AMD Hudson-2 + AMD CZ Serverworks OSB4 Serverworks CSB5 Serverworks CSB6 diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c index 6bb839b688be..09324d0178d5 100644 --- a/drivers/i2c/busses/i2c-at91.c +++ b/drivers/i2c/busses/i2c-at91.c @@ -102,6 +102,7 @@ struct at91_twi_dev { unsigned twi_cwgr_reg; struct at91_twi_pdata *pdata; bool use_dma; + bool recv_len_abort; struct at91_twi_dma dma; }; @@ -211,7 +212,7 @@ static void at91_twi_write_data_dma_callback(void *data) struct at91_twi_dev *dev = (struct at91_twi_dev *)data; dma_unmap_single(dev->dev, sg_dma_address(&dev->dma.sg), - dev->buf_len, DMA_MEM_TO_DEV); + dev->buf_len, DMA_TO_DEVICE); at91_twi_write(dev, AT91_TWI_CR, AT91_TWI_STOP); } @@ -268,12 +269,24 @@ static void at91_twi_read_next_byte(struct at91_twi_dev *dev) *dev->buf = at91_twi_read(dev, AT91_TWI_RHR) & 0xff; --dev->buf_len; + /* return if aborting, we only needed to read RHR to clear RXRDY*/ + if (dev->recv_len_abort) + return; + /* handle I2C_SMBUS_BLOCK_DATA */ if (unlikely(dev->msg->flags & I2C_M_RECV_LEN)) { - dev->msg->flags &= ~I2C_M_RECV_LEN; - dev->buf_len += *dev->buf; - dev->msg->len = dev->buf_len + 1; - dev_dbg(dev->dev, "received block length %d\n", dev->buf_len); + /* ensure length byte is a valid value */ + if (*dev->buf <= I2C_SMBUS_BLOCK_MAX && *dev->buf > 0) { + dev->msg->flags &= ~I2C_M_RECV_LEN; + dev->buf_len += *dev->buf; + dev->msg->len = dev->buf_len + 1; + dev_dbg(dev->dev, "received block length %d\n", + dev->buf_len); + } else { + /* abort and send the stop by reading one more byte */ + dev->recv_len_abort = true; + dev->buf_len = 1; + } } /* send stop if second but last byte has been read */ @@ -290,7 +303,7 @@ static void at91_twi_read_data_dma_callback(void *data) struct at91_twi_dev *dev = (struct at91_twi_dev *)data; dma_unmap_single(dev->dev, sg_dma_address(&dev->dma.sg), - dev->buf_len, DMA_DEV_TO_MEM); + dev->buf_len, DMA_FROM_DEVICE); /* The last two bytes have to be read without using dma */ dev->buf += dev->buf_len - 2; @@ -422,8 +435,8 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) } } - ret = wait_for_completion_interruptible_timeout(&dev->cmd_complete, - dev->adapter.timeout); + ret = wait_for_completion_timeout(&dev->cmd_complete, + dev->adapter.timeout); if (ret == 0) { dev_err(dev->dev, "controller timed out\n"); at91_init_twi_bus(dev); @@ -445,6 +458,12 @@ static int at91_do_twi_transfer(struct at91_twi_dev *dev) ret = -EIO; goto error; } + if (dev->recv_len_abort) { + dev_err(dev->dev, "invalid smbus block length recvd\n"); + ret = -EPROTO; + goto error; + } + dev_dbg(dev->dev, "transfer complete\n"); return 0; @@ -501,6 +520,7 @@ static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num) dev->buf_len = m_start->len; dev->buf = m_start->buf; dev->msg = m_start; + dev->recv_len_abort = false; ret = at91_do_twi_transfer(dev); diff --git a/drivers/i2c/busses/i2c-davinci.c b/drivers/i2c/busses/i2c-davinci.c index cf20e06a88e1..09f29e92095a 100644 --- a/drivers/i2c/busses/i2c-davinci.c +++ b/drivers/i2c/busses/i2c-davinci.c @@ -414,11 +414,9 @@ i2c_davinci_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, int stop) if (dev->cmd_err & DAVINCI_I2C_STR_NACK) { if (msg->flags & I2C_M_IGNORE_NAK) return msg->len; - if (stop) { - w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG); - w |= DAVINCI_I2C_MDR_STP; - davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w); - } + w = davinci_i2c_read_reg(dev, DAVINCI_I2C_MDR_REG); + w |= DAVINCI_I2C_MDR_STP; + davinci_i2c_write_reg(dev, DAVINCI_I2C_MDR_REG, w); return -EREMOTEIO; } return -EIO; diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index c41ca6354fc5..f24a7385260a 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -380,6 +380,9 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) ic_con &= ~DW_IC_CON_10BITADDR_MASTER; dw_writel(dev, ic_con, DW_IC_CON); + /* enforce disabled interrupts (due to HW issues) */ + i2c_dw_disable_int(dev); + /* Enable the adapter */ __i2c_dw_enable(dev, true); diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 3a6903f63913..783fa75e13ae 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -58,6 +58,9 @@ Wellsburg (PCH) MS 0x8d7d 32 hard yes yes yes Wellsburg (PCH) MS 0x8d7e 32 hard yes yes yes Wellsburg (PCH) MS 0x8d7f 32 hard yes yes yes + Coleto Creek (PCH) 0x23b0 32 hard yes yes yes + Wildcat Point-LP (PCH) 0x9ca2 32 hard yes yes yes + BayTrail (SOC) 0x0f12 32 hard yes yes yes Features supported by this driver: Software PEC no @@ -160,6 +163,7 @@ STATUS_ERROR_FLAGS) /* Older devices have their ID defined in <linux/pci_ids.h> */ +#define PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS 0x0f12 #define PCI_DEVICE_ID_INTEL_COUGARPOINT_SMBUS 0x1c22 #define PCI_DEVICE_ID_INTEL_PATSBURG_SMBUS 0x1d22 /* Patsburg also has three 'Integrated Device Function' SMBus controllers */ @@ -169,6 +173,7 @@ #define PCI_DEVICE_ID_INTEL_PANTHERPOINT_SMBUS 0x1e22 #define PCI_DEVICE_ID_INTEL_AVOTON_SMBUS 0x1f3c #define PCI_DEVICE_ID_INTEL_DH89XXCC_SMBUS 0x2330 +#define PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS 0x23b0 #define PCI_DEVICE_ID_INTEL_5_3400_SERIES_SMBUS 0x3b30 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22 #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS 0x8d22 @@ -176,6 +181,7 @@ #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1 0x8d7e #define PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2 0x8d7f #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22 +#define PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS 0x9ca2 struct i801_mux_config { char *gpio_chip; @@ -817,6 +823,9 @@ static DEFINE_PCI_DEVICE_TABLE(i801_ids) = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS0) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS1) }, { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WELLSBURG_SMBUS_MS2) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_COLETOCREEK_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_WILDCATPOINT_LP_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BAYTRAIL_SMBUS) }, { 0, } }; diff --git a/drivers/i2c/busses/i2c-ismt.c b/drivers/i2c/busses/i2c-ismt.c index cd82eb44e4c4..7c9f053556f2 100644 --- a/drivers/i2c/busses/i2c-ismt.c +++ b/drivers/i2c/busses/i2c-ismt.c @@ -393,6 +393,9 @@ static int ismt_access(struct i2c_adapter *adap, u16 addr, desc = &priv->hw[priv->head]; + /* Initialize the DMA buffer */ + memset(priv->dma_buffer, 0, sizeof(priv->dma_buffer)); + /* Initialize the descriptor */ memset(desc, 0, sizeof(struct ismt_desc)); desc->tgtaddr_rw = ISMT_DESC_ADDR_RW(addr, read_write); diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c index 2039f230482d..6d8094d44987 100644 --- a/drivers/i2c/busses/i2c-mxs.c +++ b/drivers/i2c/busses/i2c-mxs.c @@ -494,7 +494,7 @@ static int mxs_i2c_xfer_msg(struct i2c_adapter *adap, struct i2c_msg *msg, * based on this empirical measurement and a lot of previous frobbing. */ i2c->cmd_err = 0; - if (msg->len < 8) { + if (0) { /* disable PIO mode until a proper fix is made */ ret = mxs_i2c_pio_setup_xfer(adap, msg, flags); if (ret) mxs_i2c_reset(i2c); diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index e02f9e36a7b2..7645924f9f8b 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -928,19 +928,20 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) if (stat & OMAP_I2C_STAT_NACK) { err |= OMAP_I2C_STAT_NACK; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_NACK); - break; } if (stat & OMAP_I2C_STAT_AL) { dev_err(dev->dev, "Arbitration lost\n"); err |= OMAP_I2C_STAT_AL; omap_i2c_ack_stat(dev, OMAP_I2C_STAT_AL); - break; } /* * ProDB0017052: Clear ARDY bit twice */ + if (stat & OMAP_I2C_STAT_ARDY) + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_ARDY); + if (stat & (OMAP_I2C_STAT_ARDY | OMAP_I2C_STAT_NACK | OMAP_I2C_STAT_AL)) { omap_i2c_ack_stat(dev, (OMAP_I2C_STAT_RRDY | @@ -957,11 +958,13 @@ omap_i2c_isr_thread(int this_irq, void *dev_id) if (dev->fifo_size) num_bytes = dev->buf_len; - omap_i2c_receive_data(dev, num_bytes, true); - - if (dev->errata & I2C_OMAP_ERRATA_I207) + if (dev->errata & I2C_OMAP_ERRATA_I207) { i2c_omap_errata_i207(dev, stat); + num_bytes = (omap_i2c_read_reg(dev, + OMAP_I2C_BUFSTAT_REG) >> 8) & 0x3F; + } + omap_i2c_receive_data(dev, num_bytes, true); omap_i2c_ack_stat(dev, OMAP_I2C_STAT_RDR); continue; } diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 39ab78c1a02c..d05ad590af29 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -22,7 +22,7 @@ Intel PIIX4, 440MX Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100 ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800 - AMD Hudson-2 + AMD Hudson-2, CZ SMSC Victory66 Note: we assume there can only be one device, with one or more @@ -522,6 +522,7 @@ static DEFINE_PCI_DEVICE_TABLE(piix4_ids) = { { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS) }, { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_HUDSON2_SMBUS) }, + { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x790b) }, { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4) }, { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index 4ba4a95b6b26..8a806f5c40cf 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -541,6 +541,12 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, ret = -EINVAL; for (i = 0; i < num; i++) { + /* This HW can't send STOP after address phase */ + if (msgs[i].len == 0) { + ret = -EOPNOTSUPP; + break; + } + /*-------------- spin lock -----------------*/ spin_lock_irqsave(&priv->lock, flags); @@ -605,7 +611,8 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap, static u32 rcar_i2c_func(struct i2c_adapter *adap) { - return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; + /* This HW can't do SMBUS_QUICK and NOSTART */ + return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK); } static const struct i2c_algorithm rcar_i2c_algo = { diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c index cab1c91b75a3..a72aad9561b0 100644 --- a/drivers/i2c/busses/i2c-s3c2410.c +++ b/drivers/i2c/busses/i2c-s3c2410.c @@ -1204,10 +1204,10 @@ static int s3c24xx_i2c_resume(struct device *dev) struct platform_device *pdev = to_platform_device(dev); struct s3c24xx_i2c *i2c = platform_get_drvdata(pdev); - i2c->suspended = 0; clk_prepare_enable(i2c->clk); s3c24xx_i2c_init(i2c); clk_disable_unprepare(i2c->clk); + i2c->suspended = 0; return 0; } diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 48e31ed69dbf..c12299fd8cca 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -23,7 +23,11 @@ SMBus 2.0 support by Mark Studebaker <mdsxyz123@yahoo.com> and Jean Delvare <khali@linux-fr.org> Mux support by Rodolfo Giometti <giometti@enneenne.com> and - Michael Lawnick <michael.lawnick.ext@nsn.com> */ + Michael Lawnick <michael.lawnick.ext@nsn.com> + OF support is copyright (c) 2008 Jochen Friedrich <jochen@scram.de> + (based on a previous patch from Jon Smirl <jonsmirl@gmail.com>) and + (c) 2013 Wolfram Sang <wsa@the-dreams.de> + */ #include <linux/module.h> #include <linux/kernel.h> @@ -35,7 +39,9 @@ #include <linux/init.h> #include <linux/idr.h> #include <linux/mutex.h> +#include <linux/of.h> #include <linux/of_device.h> +#include <linux/of_irq.h> #include <linux/completion.h> #include <linux/hardirq.h> #include <linux/irqflags.h> @@ -43,6 +49,7 @@ #include <linux/pm_runtime.h> #include <linux/acpi.h> #include <asm/uaccess.h> +#include <linux/err.h> #include "i2c-core.h" @@ -206,6 +213,7 @@ int i2c_generic_scl_recovery(struct i2c_adapter *adap) adap->bus_recovery_info->set_scl(adap, 1); return i2c_generic_recovery(adap); } +EXPORT_SYMBOL_GPL(i2c_generic_scl_recovery); int i2c_generic_gpio_recovery(struct i2c_adapter *adap) { @@ -220,6 +228,7 @@ int i2c_generic_gpio_recovery(struct i2c_adapter *adap) return ret; } +EXPORT_SYMBOL_GPL(i2c_generic_gpio_recovery); int i2c_recover_bus(struct i2c_adapter *adap) { @@ -229,6 +238,7 @@ int i2c_recover_bus(struct i2c_adapter *adap) dev_dbg(&adap->dev, "Trying i2c bus recovery\n"); return adap->bus_recovery_info->recover_bus(adap); } +EXPORT_SYMBOL_GPL(i2c_recover_bus); static int i2c_device_probe(struct device *dev) { @@ -697,6 +707,10 @@ EXPORT_SYMBOL_GPL(i2c_new_device); */ void i2c_unregister_device(struct i2c_client *client) { +#if IS_ENABLED(CONFIG_OF_DYNAMIC) + if (client->dev.of_node) + of_node_clear_flag(client->dev.of_node, OF_POPULATED); +#endif device_unregister(&client->dev); } EXPORT_SYMBOL_GPL(i2c_unregister_device); @@ -954,6 +968,113 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter) up_read(&__i2c_board_lock); } +/* OF support code */ + +#if IS_ENABLED(CONFIG_OF) +static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, + struct device_node *node) +{ + struct i2c_client *result; + struct i2c_board_info info = {}; + struct dev_archdata dev_ad = {}; + const __be32 *addr; + int len; + + dev_dbg(&adap->dev, "of_i2c: register %s\n", node->full_name); + + if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { + dev_err(&adap->dev, "of_i2c: modalias failure on %s\n", + node->full_name); + return ERR_PTR(-EINVAL); + } + + addr = of_get_property(node, "reg", &len); + if (!addr || (len < sizeof(int))) { + dev_err(&adap->dev, "of_i2c: invalid reg on %s\n", + node->full_name); + return ERR_PTR(-EINVAL); + } + + info.addr = be32_to_cpup(addr); + if (info.addr > (1 << 10) - 1) { + dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n", + info.addr, node->full_name); + return ERR_PTR(-EINVAL); + } + + info.irq = irq_of_parse_and_map(node, 0); + info.of_node = of_node_get(node); + info.archdata = &dev_ad; + + if (of_get_property(node, "wakeup-source", NULL)) + info.flags |= I2C_CLIENT_WAKE; + + request_module("%s%s", I2C_MODULE_PREFIX, info.type); + + result = i2c_new_device(adap, &info); + if (result == NULL) { + dev_err(&adap->dev, "of_i2c: Failure registering %s\n", + node->full_name); + of_node_put(node); + irq_dispose_mapping(info.irq); + return ERR_PTR(-EINVAL); + } + return result; +} + +static void internal_of_i2c_register_devices(struct i2c_adapter *adap) +{ + struct device_node *node; + + /* Only register child devices if the adapter has a node pointer set */ + if (!adap->dev.of_node) + return; + + dev_dbg(&adap->dev, "of_i2c: walking child nodes\n"); + + for_each_available_child_of_node(adap->dev.of_node, node) { + if (of_node_test_and_set_flag(node, OF_POPULATED)) + continue; + of_i2c_register_device(adap, node); + } +} + +static int of_dev_node_match(struct device *dev, void *data) +{ + return dev->of_node == data; +} + +/* must call put_device() when done with returned i2c_client device */ +struct i2c_client *of_find_i2c_device_by_node(struct device_node *node) +{ + struct device *dev; + + dev = bus_find_device(&i2c_bus_type, NULL, node, + of_dev_node_match); + if (!dev) + return NULL; + + return i2c_verify_client(dev); +} +EXPORT_SYMBOL(of_find_i2c_device_by_node); + +/* must call put_device() when done with returned i2c_adapter device */ +struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node) +{ + struct device *dev; + + dev = bus_find_device(&i2c_bus_type, NULL, node, + of_dev_node_match); + if (!dev) + return NULL; + + return i2c_verify_adapter(dev); +} +EXPORT_SYMBOL(of_find_i2c_adapter_by_node); +#else +static void internal_of_i2c_register_devices(struct i2c_adapter *adap) { } +#endif /* CONFIG_OF */ + static int i2c_do_add_adapter(struct i2c_driver *driver, struct i2c_adapter *adap) { @@ -1058,6 +1179,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap) exit_recovery: /* create pre-declared device nodes */ + internal_of_i2c_register_devices(adap); + if (adap->nr < __i2c_first_dynamic_bus_num) i2c_scan_static_board_info(adap); @@ -1282,7 +1405,6 @@ void i2c_del_adapter(struct i2c_adapter *adap) } EXPORT_SYMBOL(i2c_del_adapter); - /* ------------------------------------------------------------------------- */ int i2c_for_each_dev(void *data, int (*fn)(struct device *, void *)) @@ -1426,6 +1548,61 @@ void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg) } EXPORT_SYMBOL(i2c_clients_command); +#if IS_ENABLED(CONFIG_OF_DYNAMIC) +static int of_i2c_notify(struct notifier_block *nb, unsigned long action, + void *arg) +{ + struct of_reconfig_data *rd = arg; + struct i2c_adapter *adap; + struct i2c_client *client; + + switch (of_reconfig_get_state_change(action, rd)) { + case OF_RECONFIG_CHANGE_ADD: + adap = of_find_i2c_adapter_by_node(rd->dn->parent); + if (adap == NULL) + return NOTIFY_OK; /* not for us */ + + if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) { + put_device(&adap->dev); + return NOTIFY_OK; + } + + client = of_i2c_register_device(adap, rd->dn); + put_device(&adap->dev); + + if (IS_ERR(client)) { + pr_err("%s: failed to create for '%s'\n", + __func__, rd->dn->full_name); + return notifier_from_errno(PTR_ERR(client)); + } + break; + case OF_RECONFIG_CHANGE_REMOVE: + /* already depopulated? */ + if (!of_node_check_flag(rd->dn, OF_POPULATED)) + return NOTIFY_OK; + + /* find our device by node */ + client = of_find_i2c_device_by_node(rd->dn); + if (client == NULL) + return NOTIFY_OK; /* no? not meant for us */ + + /* unregister takes one ref away */ + i2c_unregister_device(client); + + /* and put the reference of the find */ + put_device(&client->dev); + break; + } + + return NOTIFY_OK; +} +static struct notifier_block i2c_of_notifier = { + .notifier_call = of_i2c_notify, +}; +#else +extern struct notifier_block i2c_of_notifier; +#endif /* CONFIG_OF_DYNAMIC */ + static int __init i2c_init(void) { int retval; @@ -1443,6 +1620,10 @@ static int __init i2c_init(void) retval = i2c_add_driver(&dummy_driver); if (retval) goto class_err; + + if (IS_ENABLED(CONFIG_OF_DYNAMIC)) + WARN_ON(of_reconfig_notifier_register(&i2c_of_notifier)); + return 0; class_err: @@ -1456,6 +1637,8 @@ bus_err: static void __exit i2c_exit(void) { + if (IS_ENABLED(CONFIG_OF_DYNAMIC)) + WARN_ON(of_reconfig_notifier_unregister(&i2c_of_notifier)); i2c_del_driver(&dummy_driver); #ifdef CONFIG_I2C_COMPAT class_compat_unregister(i2c_adapter_compat_class); diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index 7409ebb33c47..797e3117bef7 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -25,7 +25,6 @@ #include <linux/i2c.h> #include <linux/i2c-mux.h> #include <linux/of.h> -#include <linux/of_i2c.h> /* multiplexer per channel data */ struct i2c_mux_priv { @@ -185,8 +184,6 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent, dev_info(&parent->dev, "Added multiplexed i2c bus %d\n", i2c_adapter_id(&priv->adap)); - of_i2c_register_devices(&priv->adap); - return &priv->adap; } EXPORT_SYMBOL_GPL(i2c_add_mux_adapter); diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c index 5a0ce0081dce..bb4f69f75f3c 100644 --- a/drivers/i2c/muxes/i2c-mux-gpio.c +++ b/drivers/i2c/muxes/i2c-mux-gpio.c @@ -31,15 +31,15 @@ static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val) int i; for (i = 0; i < mux->data.n_gpios; i++) - gpio_set_value(mux->gpio_base + mux->data.gpios[i], - val & (1 << i)); + gpio_set_value_cansleep(mux->gpio_base + mux->data.gpios[i], + val & (1 << i)); } static int i2c_mux_gpio_select(struct i2c_adapter *adap, void *data, u32 chan) { struct gpiomux *mux = data; - i2c_mux_gpio_set(mux, mux->data.values[chan]); + i2c_mux_gpio_set(mux, chan); return 0; } @@ -223,7 +223,7 @@ static int i2c_mux_gpio_probe(struct platform_device *pdev) unsigned int class = mux->data.classes ? mux->data.classes[i] : 0; mux->adap[i] = i2c_add_mux_adapter(parent, &pdev->dev, mux, nr, - i, class, + mux->data.values[i], class, i2c_mux_gpio_select, deselect); if (!mux->adap[i]) { ret = -ENODEV; |