openwrt/target/linux/lantiq/patches-3.9/0022-PINCTRL-add-gpio_irq-support.patch

From ea78e25b769740a801e259f4f6cb93fa92faa244 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sat, 29 Jun 2013 19:32:08 +0200
Subject: [PATCH 22/22] PINCTRL: add gpio_irq support

---
 drivers/pinctrl/pinctrl-xway.c |   28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

--- a/drivers/pinctrl/pinctrl-xway.c
+++ b/drivers/pinctrl/pinctrl-xway.c
@@ -564,10 +564,9 @@ static struct pinctrl_desc xway_pctrl_de
 	.confops	= &xway_pinconf_ops,
 };
 
-static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
+static int mux_apply(struct ltq_pinmux_info *info,
 				int pin, int mux)
 {
-	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
 	int port = PORT(pin);
 	u32 alt1_reg = GPIO_ALT1(pin);
 
@@ -587,6 +586,14 @@ static inline int xway_mux_apply(struct
 	return 0;
 }
 
+static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
+				int pin, int mux)
+{
+	struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
+
+	return mux_apply(info, pin, mux);
+}
+
 static const struct ltq_cfg_param xway_cfg_params[] = {
 	{"lantiq,pull",		LTQ_PINCONF_PARAM_PULL},
 	{"lantiq,open-drain",	LTQ_PINCONF_PARAM_OPEN_DRAIN},
@@ -631,6 +638,10 @@ static int xway_gpio_dir_out(struct gpio
 {
 	struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
 
+	if (PORT(pin) == PORT3)
+		gpio_setbit(info->membase[0], GPIO3_OD, PORT_PIN(pin));
+	else
+		gpio_setbit(info->membase[0], GPIO_OD(pin), PORT_PIN(pin));
 	gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
 	xway_gpio_set(chip, pin, val);
 
@@ -651,6 +662,18 @@ static void xway_gpio_free(struct gpio_c
 	pinctrl_free_gpio(gpio);
 }
 
+static int xway_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
+	int i;
+
+	for (i = 0; i < info->num_exin; i++)
+		if (info->exin[i] == offset)
+			return ltq_eiu_get_irq(i);
+
+	return -1;
+}
+
 static struct gpio_chip xway_chip = {
 	.label = "gpio-xway",
 	.direction_input = xway_gpio_dir_in,
@@ -659,6 +682,7 @@ static struct gpio_chip xway_chip = {
 	.set = xway_gpio_set,
 	.request = xway_gpio_req,
 	.free = xway_gpio_free,
+	.to_irq = xway_gpio_to_irq,
 	.base = -1,
 };