pinctrl: ingenic: Handle PIN_CONFIG_OUTPUT config

This makes the driver support the 'output-low' and 'output-high'
devicetree properties in gpio-hog sub-nodes.
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20191119155211.102527-1-paul@crapouillou.netSigned-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-ingenic.c

@@ -1801,19 +1801,30 @@ 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, JZ4760_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;
@@ -1821,6 +1832,8 @@ 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",
@@ -1844,6 +1857,14 @@ 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();
 		}