The AXP209 device has a 4th GPIO which has a slightly different register
setup, where the control + status bits are held in a single register
rather than sharing AXP20X_GPIO20_SS with GPIOs 0-2.
Signed-off-by: Jonathan McDowell <noodles@xxxxxxxx>
---
drivers/pinctrl/pinctrl-axp209.c | 42 ++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/drivers/pinctrl/pinctrl-axp209.c b/drivers/pinctrl/pinctrl-axp209.c
index 0bc1b381a2b8..317691aee86b 100644
--- a/drivers/pinctrl/pinctrl-axp209.c
+++ b/drivers/pinctrl/pinctrl-axp209.c
@@ -30,6 +30,11 @@
#define AXP20X_GPIO_FUNCTION_OUT_HIGH 1
#define AXP20X_GPIO_FUNCTION_INPUT 2
+#define AXP20X_GPIO3_FUNCTIONS (BIT(2) | BIT(1))
+#define AXP20X_GPIO3_FUNCTION_OUT_LOW 0
+#define AXP20X_GPIO3_FUNCTION_OUT_HIGH BIT(1)
+#define AXP20X_GPIO3_FUNCTION_INPUT BIT(2)
+
#define AXP20X_FUNC_GPIO_OUT 0
#define AXP20X_FUNC_GPIO_IN 1
#define AXP20X_FUNC_LDO 2
@@ -73,6 +78,7 @@ static const struct pinctrl_pin_desc axp209_pins[] = {
PINCTRL_PIN(0, "GPIO0"),
PINCTRL_PIN(1, "GPIO1"),
PINCTRL_PIN(2, "GPIO2"),
+ PINCTRL_PIN(3, "GPIO3"),
};
static const struct pinctrl_pin_desc axp22x_pins[] = {
@@ -130,6 +136,14 @@ static int axp20x_gpio_get(struct gpio_chip *chip, unsigned int offset)
unsigned int val;
int ret;
+ /* AXP209 has GPIO3 status sharing the settings register */
+ if (offset == 3) {
+ ret = regmap_read(pctl->regmap, AXP20X_GPIO3_CTRL, &val);
+ if (ret)
+ return ret;
+ return !!(val & BIT(0));
+ }
+
ret = regmap_read(pctl->regmap, AXP20X_GPIO20_SS, &val);
if (ret)
return ret;
@@ -144,6 +158,17 @@ static int axp20x_gpio_get_direction(struct gpio_chip *chip,
unsigned int val;
int reg, ret;
+ /* AXP209 GPIO3 settings have a different layout */
+ if (offset == 3) {
+ ret = regmap_read(pctl->regmap, AXP20X_GPIO3_CTRL, &val);
+ if (ret)
+ return ret;
+ if (val & AXP20X_GPIO3_FUNCTION_INPUT)
+ return GPIO_LINE_DIRECTION_IN;
+ else
+ return GPIO_LINE_DIRECTION_OUT;
+ }
+
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return reg;
@@ -184,6 +209,15 @@ static void axp20x_gpio_set(struct gpio_chip *chip, unsigned int offset,
struct axp20x_pctl *pctl = gpiochip_get_data(chip);
int reg;
+ /* AXP209 has GPIO3 status sharing the settings register */
+ if (offset == 3) {
+ regmap_update_bits(pctl->regmap, AXP20X_GPIO3_CTRL,
+ AXP20X_GPIO3_FUNCTIONS,
+ value ? AXP20X_GPIO3_FUNCTION_OUT_HIGH :
+ AXP20X_GPIO3_FUNCTION_OUT_LOW);
+ return;
+ }
+
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return;
@@ -200,6 +234,14 @@ static int axp20x_pmx_set(struct pinctrl_dev *pctldev, unsigned int offset,
struct axp20x_pctl *pctl = pinctrl_dev_get_drvdata(pctldev);
int reg;
+ /* AXP209 GPIO3 settings have a different layout */
+ if (offset == 3) {
+ return regmap_update_bits(pctl->regmap, AXP20X_GPIO3_CTRL,
+ AXP20X_GPIO3_FUNCTIONS,
+ config == AXP20X_MUX_GPIO_OUT ? AXP20X_GPIO3_FUNCTION_OUT_LOW :
+ AXP20X_GPIO3_FUNCTION_INPUT);
+ }
+
reg = axp20x_gpio_get_reg(offset);
if (reg < 0)
return reg;
--
2.39.2
