diff options
| author | Patrice Chotard <patrice.chotard@st.com> | 2013-06-20 18:05:00 +0400 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-06-24 15:29:59 +0400 |
| commit | 61ce135679d2b0b38f55edc7833b4b1f32c890ed (patch) | |
| tree | 6e148f631eeacbf8a15d4e2326a9d333c913c72c /drivers/pinctrl | |
| parent | 64a45c986349a00f0d4c96c0daeecdea76e31a96 (diff) | |
| download | linux-61ce135679d2b0b38f55edc7833b4b1f32c890ed.tar.xz | |
pinctrl: abx500: fix abx500_pin_config_set()
- Update abx500_pin_config_set() in order to take in
account PIN_CONFIG_BIAS_DISABLE state to disable
pull up or pull down.
- Rework error path.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-abx500.c | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/drivers/pinctrl/pinctrl-abx500.c b/drivers/pinctrl/pinctrl-abx500.c index f13a57b13b05..caa7ab6811d1 100644 --- a/drivers/pinctrl/pinctrl-abx500.c +++ b/drivers/pinctrl/pinctrl-abx500.c @@ -33,6 +33,7 @@ #include <linux/pinctrl/machine.h> #include "pinctrl-abx500.h" +#include "core.h" #include "pinconf.h" /* @@ -963,7 +964,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, struct pullud *pullud = pct->soc->pullud; struct gpio_chip *chip = &pct->chip; unsigned offset; - int ret = 0; + int ret = -EINVAL; enum pin_config_param param = pinconf_to_config_param(config); enum pin_config_param argument = pinconf_to_config_argument(config); @@ -976,13 +977,32 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, offset = pin - 1; switch (param) { - case PIN_CONFIG_BIAS_PULL_DOWN: + case PIN_CONFIG_BIAS_DISABLE: + ret = abx500_gpio_direction_input(chip, offset); /* - * if argument = 1 set the pull down - * else clear the pull down + * Some chips only support pull down, while some actually + * support both pull up and pull down. Such chips have + * a "pullud" range specified for the pins that support + * both features. If the pin is not within that range, we + * fall back to the old bit set that only support pull down. */ + if (pullud && + pin >= pullud->first_pin && + pin <= pullud->last_pin) + ret = abx500_set_pull_updown(pct, + pin, + ABX500_GPIO_PULL_NONE); + else + /* Chip only supports pull down */ + ret = abx500_gpio_set_bits(chip, AB8500_GPIO_PUD1_REG, + offset, ABX500_GPIO_PULL_NONE); + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: ret = abx500_gpio_direction_input(chip, offset); /* + * if argument = 1 set the pull down + * else clear the pull down * Some chips only support pull down, while some actually * support both pull up and pull down. Such chips have * a "pullud" range specified for the pins that support @@ -1002,6 +1022,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, break; case PIN_CONFIG_BIAS_PULL_UP: + ret = abx500_gpio_direction_input(chip, offset); /* * if argument = 1 set the pull up * else clear the pull up @@ -1030,8 +1051,6 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev, default: dev_err(chip->dev, "illegal configuration requested\n"); - - return -EINVAL; } return ret; |