diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-at91-master.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-at91-master.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c index 0aba51a7df32..37b96ac9dfae 100644 --- a/drivers/i2c/busses/i2c-at91-master.c +++ b/drivers/i2c/busses/i2c-at91-master.c @@ -845,6 +845,18 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev, PINCTRL_STATE_DEFAULT); dev->pinctrl_pins_gpio = pinctrl_lookup_state(dev->pinctrl, "gpio"); + if (IS_ERR(dev->pinctrl_pins_default) || + IS_ERR(dev->pinctrl_pins_gpio)) { + dev_info(&pdev->dev, "pinctrl states incomplete for recovery\n"); + return -EINVAL; + } + + /* + * pins will be taken as GPIO, so we might as well inform pinctrl about + * this and move the state to GPIO + */ + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio); + rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN); if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER) return -EPROBE_DEFER; @@ -855,9 +867,7 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev, return -EPROBE_DEFER; if (IS_ERR(rinfo->sda_gpiod) || - IS_ERR(rinfo->scl_gpiod) || - IS_ERR(dev->pinctrl_pins_default) || - IS_ERR(dev->pinctrl_pins_gpio)) { + IS_ERR(rinfo->scl_gpiod)) { dev_info(&pdev->dev, "recovery information incomplete\n"); if (!IS_ERR(rinfo->sda_gpiod)) { gpiod_put(rinfo->sda_gpiod); @@ -867,9 +877,13 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev, gpiod_put(rinfo->scl_gpiod); rinfo->scl_gpiod = NULL; } + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); return -EINVAL; } + /* change the state of the pins back to their default state */ + pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default); + dev_info(&pdev->dev, "using scl, sda for recovery\n"); rinfo->prepare_recovery = at91_prepare_twi_recovery; |