diff options
Diffstat (limited to 'drivers/i2c')
-rw-r--r-- | drivers/i2c/Kconfig | 1 | ||||
-rw-r--r-- | drivers/i2c/busses/Kconfig | 12 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-designware-core.c | 81 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-digicolor.c | 3 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 16 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-imx.c | 11 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-jz4780.c | 1 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-octeon-core.c | 4 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-octeon-core.h | 27 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-rk3x.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-xgene-slimpro.c | 2 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-xlp9xx.c | 1 | ||||
-rw-r--r-- | drivers/i2c/busses/i2c-xlr.c | 1 | ||||
-rw-r--r-- | drivers/i2c/i2c-core.c | 13 | ||||
-rw-r--r-- | drivers/i2c/muxes/Kconfig | 1 | ||||
-rw-r--r-- | drivers/i2c/muxes/i2c-demux-pinctrl.c | 22 | ||||
-rw-r--r-- | drivers/i2c/muxes/i2c-mux-pca954x.c | 4 |
17 files changed, 119 insertions, 83 deletions
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index d223650a97e4..11edabf425ae 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -59,7 +59,6 @@ config I2C_CHARDEV config I2C_MUX tristate "I2C bus multiplexing support" - depends on HAS_IOMEM help Say Y here if you want the I2C core to support the ability to handle multiplexed I2C bus topologies, by presenting each diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 6d94e2ec5b4f..d252276feadf 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -79,12 +79,12 @@ config I2C_AMD8111 config I2C_HIX5HD2 tristate "Hix5hd2 high-speed I2C driver" - depends on ARCH_HIX5HD2 || COMPILE_TEST + depends on ARCH_HISI || ARCH_HIX5HD2 || COMPILE_TEST help - Say Y here to include support for high-speed I2C controller in the - Hisilicon based hix5hd2 SoCs. + Say Y here to include support for the high-speed I2C controller + used in HiSilicon hix5hd2 SoCs. - This driver can also be built as a module. If so, the module + This driver can also be built as a module. If so, the module will be called i2c-hix5hd2. config I2C_I801 @@ -589,10 +589,10 @@ config I2C_IMG config I2C_IMX tristate "IMX I2C interface" - depends on ARCH_MXC || ARCH_LAYERSCAPE + depends on ARCH_MXC || ARCH_LAYERSCAPE || COLDFIRE help Say Y here if you want to use the IIC bus controller on - the Freescale i.MX/MXC or Layerscape processors. + the Freescale i.MX/MXC, Layerscape or ColdFire processors. This driver can also be built as a module. If so, the module will be called i2c-imx. diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c index 1fe93c43215c..b403fa5ecf49 100644 --- a/drivers/i2c/busses/i2c-designware-core.c +++ b/drivers/i2c/busses/i2c-designware-core.c @@ -91,9 +91,10 @@ DW_IC_INTR_TX_ABRT | \ DW_IC_INTR_STOP_DET) -#define DW_IC_STATUS_ACTIVITY 0x1 -#define DW_IC_STATUS_TFE BIT(2) -#define DW_IC_STATUS_MST_ACTIVITY BIT(5) +#define DW_IC_STATUS_ACTIVITY 0x1 + +#define DW_IC_SDA_HOLD_RX_SHIFT 16 +#define DW_IC_SDA_HOLD_RX_MASK GENMASK(23, DW_IC_SDA_HOLD_RX_SHIFT) #define DW_IC_ERR_TX_ABRT 0x1 @@ -420,12 +421,20 @@ int i2c_dw_init(struct dw_i2c_dev *dev) /* Configure SDA Hold Time if required */ reg = dw_readl(dev, DW_IC_COMP_VERSION); if (reg >= DW_IC_SDA_HOLD_MIN_VERS) { - if (dev->sda_hold_time) { - dw_writel(dev, dev->sda_hold_time, DW_IC_SDA_HOLD); - } else { + if (!dev->sda_hold_time) { /* Keep previous hold time setting if no one set it */ dev->sda_hold_time = dw_readl(dev, DW_IC_SDA_HOLD); } + /* + * Workaround for avoiding TX arbitration lost in case I2C + * slave pulls SDA down "too quickly" after falling egde of + * SCL by enabling non-zero SDA RX hold. Specification says it + * extends incoming SDA low to high transition while SCL is + * high but it apprears to help also above issue. + */ + if (!(dev->sda_hold_time & DW_IC_SDA_HOLD_RX_MASK)) + dev->sda_hold_time |= 1 << DW_IC_SDA_HOLD_RX_SHIFT; + dw_writel(dev, dev->sda_hold_time, DW_IC_SDA_HOLD); } else { dev_warn(dev->dev, "Hardware too old to adjust SDA hold time.\n"); @@ -467,25 +476,9 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) { struct i2c_msg *msgs = dev->msgs; u32 ic_tar = 0; - bool enabled; - - enabled = dw_readl(dev, DW_IC_ENABLE_STATUS) & 1; - - if (enabled) { - u32 ic_status; - /* - * Only disable adapter if ic_tar and ic_con can't be - * dynamically updated - */ - ic_status = dw_readl(dev, DW_IC_STATUS); - if (!dev->dynamic_tar_update_enabled || - (ic_status & DW_IC_STATUS_MST_ACTIVITY) || - !(ic_status & DW_IC_STATUS_TFE)) { - __i2c_dw_enable_and_wait(dev, false); - enabled = false; - } - } + /* Disable the adapter */ + __i2c_dw_enable_and_wait(dev, false); /* if the slave address is ten bit address, enable 10BITADDR */ if (dev->dynamic_tar_update_enabled) { @@ -515,8 +508,8 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev) /* enforce disabled interrupts (due to HW issues) */ i2c_dw_disable_int(dev); - if (!enabled) - __i2c_dw_enable(dev, true); + /* Enable the adapter */ + __i2c_dw_enable(dev, true); /* Clear and enable interrupts */ dw_readl(dev, DW_IC_CLR_INTR); @@ -600,7 +593,7 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev) if (msgs[dev->msg_write_idx].flags & I2C_M_RD) { /* avoid rx buffer overrun */ - if (rx_limit - dev->rx_outstanding <= 0) + if (dev->rx_outstanding >= dev->rx_fifo_depth) break; dw_writel(dev, cmd | 0x100, DW_IC_DATA_CMD); @@ -697,8 +690,7 @@ static int i2c_dw_handle_tx_abort(struct dw_i2c_dev *dev) } /* - * Prepare controller for a transaction and start transfer by calling - * i2c_dw_xfer_init() + * Prepare controller for a transaction and call i2c_dw_xfer_msg */ static int i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) @@ -741,13 +733,23 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) goto done; } + /* + * We must disable the adapter before returning and signaling the end + * of the current transfer. Otherwise the hardware might continue + * generating interrupts which in turn causes a race condition with + * the following transfer. Needs some more investigation if the + * additional interrupts are a hardware bug or this driver doesn't + * handle them correctly yet. + */ + __i2c_dw_enable(dev, false); + if (dev->msg_err) { ret = dev->msg_err; goto done; } /* no error */ - if (likely(!dev->cmd_err)) { + if (likely(!dev->cmd_err && !dev->status)) { ret = num; goto done; } @@ -757,6 +759,11 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) ret = i2c_dw_handle_tx_abort(dev); goto done; } + + if (dev->status) + dev_err(dev->dev, + "transfer terminated early - interrupt latency too high?\n"); + ret = -EIO; done: @@ -877,19 +884,9 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id) */ tx_aborted: - if ((stat & (DW_IC_INTR_TX_ABRT | DW_IC_INTR_STOP_DET)) - || dev->msg_err) { - /* - * We must disable interruts before returning and signaling - * the end of the current transfer. Otherwise the hardware - * might continue generating interrupts for non-existent - * transfers. - */ - i2c_dw_disable_int(dev); - dw_readl(dev, DW_IC_CLR_INTR); - + if ((stat & (DW_IC_INTR_TX_ABRT | DW_IC_INTR_STOP_DET)) || dev->msg_err) complete(&dev->cmd_complete); - } else if (unlikely(dev->accessor_flags & ACCESS_INTR_MASK)) { + else if (unlikely(dev->accessor_flags & ACCESS_INTR_MASK)) { /* workaround to trigger pending interrupt */ stat = dw_readl(dev, DW_IC_INTR_MASK); i2c_dw_disable_int(dev); diff --git a/drivers/i2c/busses/i2c-digicolor.c b/drivers/i2c/busses/i2c-digicolor.c index 9604024e0eb0..50813a24c541 100644 --- a/drivers/i2c/busses/i2c-digicolor.c +++ b/drivers/i2c/busses/i2c-digicolor.c @@ -347,7 +347,7 @@ static int dc_i2c_probe(struct platform_device *pdev) ret = i2c_add_adapter(&i2c->adap); if (ret < 0) { - clk_unprepare(i2c->clk); + clk_disable_unprepare(i2c->clk); return ret; } @@ -368,6 +368,7 @@ static const struct of_device_id dc_i2c_match[] = { { .compatible = "cnxt,cx92755-i2c" }, { }, }; +MODULE_DEVICE_TABLE(of, dc_i2c_match); static struct platform_driver dc_i2c_driver = { .probe = dc_i2c_probe, diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index 08847e8b8998..eb3627f35d12 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -146,6 +146,7 @@ #define SMBHSTCFG_HST_EN 1 #define SMBHSTCFG_SMB_SMI_EN 2 #define SMBHSTCFG_I2C_EN 4 +#define SMBHSTCFG_SPD_WD 0x10 /* TCO configuration bits for TCOCTL */ #define TCOCTL_EN 0x0100 @@ -865,9 +866,16 @@ static s32 i801_access(struct i2c_adapter *adap, u16 addr, block = 1; break; case I2C_SMBUS_I2C_BLOCK_DATA: - /* NB: page 240 of ICH5 datasheet shows that the R/#W - * bit should be cleared here, even when reading */ - outb_p((addr & 0x7f) << 1, SMBHSTADD(priv)); + /* + * NB: page 240 of ICH5 datasheet shows that the R/#W + * bit should be cleared here, even when reading. + * However if SPD Write Disable is set (Lynx Point and later), + * the read will fail if we don't set the R/#W bit. + */ + outb_p(((addr & 0x7f) << 1) | + ((priv->original_hstcfg & SMBHSTCFG_SPD_WD) ? + (read_write & 0x01) : 0), + SMBHSTADD(priv)); if (read_write == I2C_SMBUS_READ) { /* NB: page 240 of ICH5 datasheet also shows * that DATA1 is the cmd field when reading */ @@ -1573,6 +1581,8 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id) /* Disable SMBus interrupt feature if SMBus using SMI# */ priv->features &= ~FEATURE_IRQ; } + if (temp & SMBHSTCFG_SPD_WD) + dev_info(&dev->dev, "SPD Write Disable is set\n"); /* Clear special mode bits */ if (priv->features & (FEATURE_SMBUS_PEC | FEATURE_BLOCK_BUFFER)) diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 592a8f26a708..47fc1f1acff7 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -1009,10 +1009,13 @@ static int i2c_imx_init_recovery_info(struct imx_i2c_struct *i2c_imx, rinfo->sda_gpio = of_get_named_gpio(pdev->dev.of_node, "sda-gpios", 0); rinfo->scl_gpio = of_get_named_gpio(pdev->dev.of_node, "scl-gpios", 0); - if (!gpio_is_valid(rinfo->sda_gpio) || - !gpio_is_valid(rinfo->scl_gpio) || - IS_ERR(i2c_imx->pinctrl_pins_default) || - IS_ERR(i2c_imx->pinctrl_pins_gpio)) { + if (rinfo->sda_gpio == -EPROBE_DEFER || + rinfo->scl_gpio == -EPROBE_DEFER) { + return -EPROBE_DEFER; + } else if (!gpio_is_valid(rinfo->sda_gpio) || + !gpio_is_valid(rinfo->scl_gpio) || + IS_ERR(i2c_imx->pinctrl_pins_default) || + IS_ERR(i2c_imx->pinctrl_pins_gpio)) { dev_dbg(&pdev->dev, "recovery information incomplete\n"); return 0; } diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index b8ea62105f42..30132c3957cd 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -729,6 +729,7 @@ static const struct of_device_id jz4780_i2c_of_matches[] = { { .compatible = "ingenic,jz4780-i2c", }, { /* sentinel */ } }; +MODULE_DEVICE_TABLE(of, jz4780_i2c_of_matches); static int jz4780_i2c_probe(struct platform_device *pdev) { diff --git a/drivers/i2c/busses/i2c-octeon-core.c b/drivers/i2c/busses/i2c-octeon-core.c index 419b54bfc7c7..5e63b17f935d 100644 --- a/drivers/i2c/busses/i2c-octeon-core.c +++ b/drivers/i2c/busses/i2c-octeon-core.c @@ -381,9 +381,7 @@ static int octeon_i2c_read(struct octeon_i2c *i2c, int target, if (result) return result; - data[i] = octeon_i2c_data_read(i2c, &result); - if (result) - return result; + data[i] = octeon_i2c_data_read(i2c); if (recv_len && i == 0) { if (data[i] > I2C_SMBUS_BLOCK_MAX + 1) return -EPROTO; diff --git a/drivers/i2c/busses/i2c-octeon-core.h b/drivers/i2c/busses/i2c-octeon-core.h index 1db7c835a454..87151ea74acd 100644 --- a/drivers/i2c/busses/i2c-octeon-core.h +++ b/drivers/i2c/busses/i2c-octeon-core.h @@ -5,7 +5,6 @@ #include <linux/i2c.h> #include <linux/i2c-smbus.h> #include <linux/io.h> -#include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/pci.h> @@ -145,9 +144,9 @@ static inline void octeon_i2c_reg_write(struct octeon_i2c *i2c, u64 eop_reg, u8 u64 tmp; __raw_writeq(SW_TWSI_V | eop_reg | data, i2c->twsi_base + SW_TWSI(i2c)); - - readq_poll_timeout(i2c->twsi_base + SW_TWSI(i2c), tmp, tmp & SW_TWSI_V, - I2C_OCTEON_EVENT_WAIT, i2c->adap.timeout); + do { + tmp = __raw_readq(i2c->twsi_base + SW_TWSI(i2c)); + } while ((tmp & SW_TWSI_V) != 0); } #define octeon_i2c_ctl_write(i2c, val) \ @@ -164,28 +163,24 @@ static inline void octeon_i2c_reg_write(struct octeon_i2c *i2c, u64 eop_reg, u8 * * The I2C core registers are accessed indirectly via the SW_TWSI CSR. */ -static inline int octeon_i2c_reg_read(struct octeon_i2c *i2c, u64 eop_reg, - int *error) +static inline u8 octeon_i2c_reg_read(struct octeon_i2c *i2c, u64 eop_reg) { u64 tmp; - int ret; __raw_writeq(SW_TWSI_V | eop_reg | SW_TWSI_R, i2c->twsi_base + SW_TWSI(i2c)); + do { + tmp = __raw_readq(i2c->twsi_base + SW_TWSI(i2c)); + } while ((tmp & SW_TWSI_V) != 0); - ret = readq_poll_timeout(i2c->twsi_base + SW_TWSI(i2c), tmp, - tmp & SW_TWSI_V, I2C_OCTEON_EVENT_WAIT, - i2c->adap.timeout); - if (error) - *error = ret; return tmp & 0xFF; } #define octeon_i2c_ctl_read(i2c) \ - octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_CTL, NULL) -#define octeon_i2c_data_read(i2c, error) \ - octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_DATA, error) + octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_CTL) +#define octeon_i2c_data_read(i2c) \ + octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_DATA) #define octeon_i2c_stat_read(i2c) \ - octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_STAT, NULL) + octeon_i2c_reg_read(i2c, SW_TWSI_EOP_TWSI_STAT) /** * octeon_i2c_read_int - read the TWSI_INT register diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c index 50702c7bb244..df220666d627 100644 --- a/drivers/i2c/busses/i2c-rk3x.c +++ b/drivers/i2c/busses/i2c-rk3x.c @@ -694,6 +694,8 @@ static int rk3x_i2c_v0_calc_timings(unsigned long clk_rate, t_calc->div_low--; t_calc->div_high--; + /* Give the tuning value 0, that would not update con register */ + t_calc->tuning = 0; /* Maximum divider supported by hw is 0xffff */ if (t_calc->div_low > 0xffff) { t_calc->div_low = 0xffff; diff --git a/drivers/i2c/busses/i2c-xgene-slimpro.c b/drivers/i2c/busses/i2c-xgene-slimpro.c index 263685c7a512..05cf192ef1ac 100644 --- a/drivers/i2c/busses/i2c-xgene-slimpro.c +++ b/drivers/i2c/busses/i2c-xgene-slimpro.c @@ -105,7 +105,7 @@ struct slimpro_i2c_dev { struct mbox_chan *mbox_chan; struct mbox_client mbox_client; struct completion rd_complete; - u8 dma_buffer[I2C_SMBUS_BLOCK_MAX]; + u8 dma_buffer[I2C_SMBUS_BLOCK_MAX + 1]; /* dma_buffer[0] is used for length */ u32 *resp_msg; }; diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c index 2a972ed7aa0d..e29ff37a43bd 100644 --- a/drivers/i2c/busses/i2c-xlp9xx.c +++ b/drivers/i2c/busses/i2c-xlp9xx.c @@ -426,6 +426,7 @@ static const struct of_device_id xlp9xx_i2c_of_match[] = { { .compatible = "netlogic,xlp980-i2c", }, { /* sentinel */ }, }; +MODULE_DEVICE_TABLE(of, xlp9xx_i2c_of_match); #ifdef CONFIG_ACPI static const struct acpi_device_id xlp9xx_i2c_acpi_ids[] = { diff --git a/drivers/i2c/busses/i2c-xlr.c b/drivers/i2c/busses/i2c-xlr.c index 0968f59b6df5..ad17d88d8573 100644 --- a/drivers/i2c/busses/i2c-xlr.c +++ b/drivers/i2c/busses/i2c-xlr.c @@ -358,6 +358,7 @@ static const struct of_device_id xlr_i2c_dt_ids[] = { }, { } }; +MODULE_DEVICE_TABLE(of, xlr_i2c_dt_ids); static int xlr_i2c_probe(struct platform_device *pdev) { diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 5ab67219f71e..b432b64e307a 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1681,6 +1681,7 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap, static void of_i2c_register_devices(struct i2c_adapter *adap) { struct device_node *bus, *node; + struct i2c_client *client; /* Only register child devices if the adapter has a node pointer set */ if (!adap->dev.of_node) @@ -1695,7 +1696,14 @@ static void of_i2c_register_devices(struct i2c_adapter *adap) for_each_available_child_of_node(bus, node) { if (of_node_test_and_set_flag(node, OF_POPULATED)) continue; - of_i2c_register_device(adap, node); + + client = of_i2c_register_device(adap, node); + if (IS_ERR(client)) { + dev_warn(&adap->dev, + "Failed to create I2C device for %s\n", + node->full_name); + of_node_clear_flag(node, OF_POPULATED); + } } of_node_put(bus); @@ -2171,6 +2179,7 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) /* add the driver to the list of i2c drivers in the driver core */ driver->driver.owner = owner; driver->driver.bus = &i2c_bus_type; + INIT_LIST_HEAD(&driver->clients); /* When registration returns, the driver core * will have called probe() for all matching-but-unbound devices. @@ -2181,7 +2190,6 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) pr_debug("driver [%s] registered\n", driver->driver.name); - INIT_LIST_HEAD(&driver->clients); /* Walk the adapters that are already present */ i2c_for_each_dev(driver, __process_new_driver); @@ -2299,6 +2307,7 @@ static int of_i2c_notify(struct notifier_block *nb, unsigned long action, if (IS_ERR(client)) { dev_err(&adap->dev, "failed to create client for '%s'\n", rd->dn->full_name); + of_node_clear_flag(rd->dn, OF_POPULATED); return notifier_from_errno(PTR_ERR(client)); } break; diff --git a/drivers/i2c/muxes/Kconfig b/drivers/i2c/muxes/Kconfig index e280c8ecc0b5..96de9ce5669b 100644 --- a/drivers/i2c/muxes/Kconfig +++ b/drivers/i2c/muxes/Kconfig @@ -63,6 +63,7 @@ config I2C_MUX_PINCTRL config I2C_MUX_REG tristate "Register-based I2C multiplexer" + depends on HAS_IOMEM help If you say yes to this option, support will be included for a register based I2C multiplexer. This driver provides access to diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c index b3893f6282ba..3e6fe1760d82 100644 --- a/drivers/i2c/muxes/i2c-demux-pinctrl.c +++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c @@ -69,10 +69,28 @@ static int i2c_demux_activate_master(struct i2c_demux_pinctrl_priv *priv, u32 ne goto err_with_revert; } - p = devm_pinctrl_get_select(adap->dev.parent, priv->bus_name); + /* + * Check if there are pinctrl states at all. Note: we cant' use + * devm_pinctrl_get_select() because we need to distinguish between + * the -ENODEV from devm_pinctrl_get() and pinctrl_lookup_state(). + */ + p = devm_pinctrl_get(adap->dev.parent); if (IS_ERR(p)) { ret = PTR_ERR(p); - goto err_with_put; + /* continue if just no pinctrl states (e.g. i2c-gpio), otherwise exit */ + if (ret != -ENODEV) + goto err_with_put; + } else { + /* there are states. check and use them */ + struct pinctrl_state *s = pinctrl_lookup_state(p, priv->bus_name); + + if (IS_ERR(s)) { + ret = PTR_ERR(s); + goto err_with_put; + } + ret = pinctrl_select_state(p, s); + if (ret < 0) + goto err_with_put; } priv->chan[new_chan].parent_adap = adap; diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c index 1091346f2480..8bc3d36d2837 100644 --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -268,9 +268,9 @@ static int pca954x_probe(struct i2c_client *client, /* discard unconfigured channels */ break; idle_disconnect_pd = pdata->modes[num].deselect_on_exit; - data->deselect |= (idle_disconnect_pd - || idle_disconnect_dt) << num; } + data->deselect |= (idle_disconnect_pd || + idle_disconnect_dt) << num; ret = i2c_mux_add_adapter(muxc, force, num, class); |