gpio: adp5520: 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().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-adp5520.c

@@ -27,7 +27,7 @@ static int adp5520_gpio_get_value(struct gpio_chip *chip, unsigned off)
 	struct adp5520_gpio *dev;
 	uint8_t reg_val;
 
-	dev = container_of(chip, struct adp5520_gpio, gpio_chip);
+	dev = gpiochip_get_data(chip);
 
 	/*
 	 * There are dedicated registers for GPIO IN/OUT.
@@ -46,7 +46,7 @@ static void adp5520_gpio_set_value(struct gpio_chip *chip,
 		unsigned off, int val)
 {
 	struct adp5520_gpio *dev;
-	dev = container_of(chip, struct adp5520_gpio, gpio_chip);
+	dev = gpiochip_get_data(chip);
 
 	if (val)
 		adp5520_set_bits(dev->master, ADP5520_GPIO_OUT, dev->lut[off]);
@@ -57,7 +57,7 @@ static void adp5520_gpio_set_value(struct gpio_chip *chip,
 static int adp5520_gpio_direction_input(struct gpio_chip *chip, unsigned off)
 {
 	struct adp5520_gpio *dev;
-	dev = container_of(chip, struct adp5520_gpio, gpio_chip);
+	dev = gpiochip_get_data(chip);
 
 	clear_bit(off, &dev->output);
 
@@ -70,7 +70,7 @@ static int adp5520_gpio_direction_output(struct gpio_chip *chip,
 {
 	struct adp5520_gpio *dev;
 	int ret = 0;
-	dev = container_of(chip, struct adp5520_gpio, gpio_chip);
+	dev = gpiochip_get_data(chip);
 
 	set_bit(off, &dev->output);
 
@@ -153,7 +153,7 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	ret = gpiochip_add(&dev->gpio_chip);
+	ret = gpiochip_add_data(&dev->gpio_chip, dev);
 	if (ret)
 		goto err;