[PATCH] pinctrl: ingenic: Handle PIN_CONFIG_OUTPUT config

[Paul Cercueil]

This enables devicetree bindings to specify that a given GPIO should be
driven low or high.

Signed-off-by: Paul Cercueil <p...@crapouillou.net>
---
 drivers/pinctrl/pinctrl-ingenic.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-ingenic.c 
b/drivers/pinctrl/pinctrl-ingenic.c
index a83ddd52efdd..07342bc769d1 100644
--- a/drivers/pinctrl/pinctrl-ingenic.c
+++ b/drivers/pinctrl/pinctrl-ingenic.c
@@ -1154,19 +1154,30 @@ static void ingenic_set_bias(struct ingenic_pinctrl 
*jzpc,
                ingenic_config_pin(jzpc, pin, JZ4740_GPIO_PULL_DIS, !enabled);
 }
 
+static void ingenic_set_output_level(struct ingenic_pinctrl *jzpc,
+                                    unsigned int pin, bool high)
+{
+       if (jzpc->version >= ID_JZ4770)
+               ingenic_config_pin(jzpc, pin, JZ4770_GPIO_PAT0, high);
+       else
+               ingenic_config_pin(jzpc, pin, JZ4740_GPIO_DATA, high);
+}
+
 static int ingenic_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
                unsigned long *configs, unsigned int num_configs)
 {
        struct ingenic_pinctrl *jzpc = pinctrl_dev_get_drvdata(pctldev);
        unsigned int idx = pin % PINS_PER_GPIO_CHIP;
        unsigned int offt = pin / PINS_PER_GPIO_CHIP;
-       unsigned int cfg;
+       unsigned int cfg, arg;
+       int ret;
 
        for (cfg = 0; cfg < num_configs; cfg++) {
                switch (pinconf_to_config_param(configs[cfg])) {
                case PIN_CONFIG_BIAS_DISABLE:
                case PIN_CONFIG_BIAS_PULL_UP:
                case PIN_CONFIG_BIAS_PULL_DOWN:
+               case PIN_CONFIG_OUTPUT:
                        continue;
                default:
                        return -ENOTSUPP;
@@ -1174,6 +1185,8 @@ static int ingenic_pinconf_set(struct pinctrl_dev 
*pctldev, unsigned int pin,
        }
 
        for (cfg = 0; cfg < num_configs; cfg++) {
+               arg = pinconf_to_config_argument(configs[cfg]);
+
                switch (pinconf_to_config_param(configs[cfg])) {
                case PIN_CONFIG_BIAS_DISABLE:
                        dev_dbg(jzpc->dev, "disable pull-over for pin P%c%u\n",
@@ -1197,6 +1210,14 @@ static int ingenic_pinconf_set(struct pinctrl_dev 
*pctldev, unsigned int pin,
                        ingenic_set_bias(jzpc, pin, true);
                        break;
 
+               case PIN_CONFIG_OUTPUT:
+                       ret = pinctrl_gpio_direction_output(pin);
+                       if (ret)
+                               return ret;
+
+                       ingenic_set_output_level(jzpc, pin, arg);
+                       break;
+
                default:
                        unreachable();
                }
-- 
2.21.0.593.g511ec345e18