Dne torek, 16. maj 2023 ob 19:47:29 CEST je Jonathan McDowell napisal(a):
> 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>
Reviewed-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Best regards,
Jernej
> ---
> 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..b3ba25435c34 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 GENMASK(2, 1)
> +#define AXP20X_GPIO3_FUNCTION_OUT_LOW 0
> +#define AXP20X_GPIO3_FUNCTION_OUT_HIGH 2
> +#define AXP20X_GPIO3_FUNCTION_INPUT 4
> +
> #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;
> +
> + 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;
>
