pinctrl: digicolor: use gpiochip data pointer

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-digicolor.c

@@ -171,7 +171,7 @@ static struct pinmux_ops dc_pmxops = {
 
 static int dc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
 {
-	struct dc_pinmap *pmap = container_of(chip, struct dc_pinmap, chip);
+	struct dc_pinmap *pmap = gpiochip_get_data(chip);
 	int reg_off = GP_DRIVE0(gpio/PINS_PER_COLLECTION);
 	int bit_off = gpio % PINS_PER_COLLECTION;
 	u8 drive;
@@ -191,7 +191,7 @@ static void dc_gpio_set(struct gpio_chip *chip, unsigned gpio, int value);
 static int dc_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
 				    int value)
 {
-	struct dc_pinmap *pmap = container_of(chip, struct dc_pinmap, chip);
+	struct dc_pinmap *pmap = gpiochip_get_data(chip);
 	int reg_off = GP_DRIVE0(gpio/PINS_PER_COLLECTION);
 	int bit_off = gpio % PINS_PER_COLLECTION;
 	u8 drive;
@@ -210,7 +210,7 @@ static int dc_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
 
 static int dc_gpio_get(struct gpio_chip *chip, unsigned gpio)
 {
-	struct dc_pinmap *pmap = container_of(chip, struct dc_pinmap, chip);
+	struct dc_pinmap *pmap = gpiochip_get_data(chip);
 	int reg_off = GP_INPUT(gpio/PINS_PER_COLLECTION);
 	int bit_off = gpio % PINS_PER_COLLECTION;
 	u8 input;
@@ -222,7 +222,7 @@ static int dc_gpio_get(struct gpio_chip *chip, unsigned gpio)
 
 static void dc_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
 {
-	struct dc_pinmap *pmap = container_of(chip, struct dc_pinmap, chip);
+	struct dc_pinmap *pmap = gpiochip_get_data(chip);
 	int reg_off = GP_OUTPUT0(gpio/PINS_PER_COLLECTION);
 	int bit_off = gpio % PINS_PER_COLLECTION;
 	u8 output;
@@ -258,7 +258,7 @@ static int dc_gpiochip_add(struct dc_pinmap *pmap, struct device_node *np)
 
 	spin_lock_init(&pmap->lock);
 
-	ret = gpiochip_add(chip);
+	ret = gpiochip_add_data(chip, pmap);
 	if (ret < 0)
 		return ret;