pinctrl: abx500: allow to set pull up
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>
diff --git a/drivers/pinctrl/pinctrl-abx500.c b/drivers/pinctrl/pinctrl-abx500.c
index 823e261..363712b 100644
--- a/drivers/pinctrl/pinctrl-abx500.c
+++ b/drivers/pinctrl/pinctrl-abx500.c
@@ -725,7 +725,7 @@
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 @@
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);