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pinctrl: abx500: allow to set pull up

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On ABx500 chip family, all pins support only pull down except for
AB8540 which supports pull up/down on some pins.
Rework abx500_pin_config_set to be able to set pull up on
pins which support this feature.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Patrice Chotard 2013-05-24 14:06:30 +02:00 committed by Linus Walleij
parent 10a8be5414
commit 9ed3cd3338
1 changed files with 23 additions and 1 deletions
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24
drivers/pinctrl/pinctrl-abx500.c
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@ -725,7 +725,7 @@ 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;
int ret = 0;
enum pin_config_param param = pinconf_to_config_param(config);
enum pin_config_param argument = pinconf_to_config_argument(config);
@ -763,6 +763,28 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
offset, argument ? 0 : 1);
break;
case PIN_CONFIG_BIAS_PULL_UP:
/*
* if argument = 1 set the pull up
* else clear the pull up
*/
ret = abx500_gpio_direction_input(chip, offset);
/*
* 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, do
* nothing
*/
if (pullud &&
pin >= pullud->first_pin &&
pin <= pullud->last_pin) {
ret = abx500_config_pull_updown(pct,
pin,
argument ? ABX500_GPIO_PULL_UP : ABX500_GPIO_PULL_NONE);
}
break;
case PIN_CONFIG_OUTPUT:
ret = abx500_gpio_direction_output(chip, offset, argument);