gpio: kempld: 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().

Cc: Brunner Michael <Michael.Brunner@kontron.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-kempld.c b/drivers/gpio/gpio-kempld.c
index 297f849..0111774 100644 (file)
--- a/drivers/gpio/gpio-kempld.c
+++ b/drivers/gpio/gpio-kempld.c
@@ -65,8 +65,7 @@ static int kempld_gpio_get_bit(struct kempld_device_data *pld, u8 reg, u8 bit)
 
 static int kempld_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-       struct kempld_gpio_data *gpio
-               = container_of(chip, struct kempld_gpio_data, chip);
+       struct kempld_gpio_data *gpio = gpiochip_get_data(chip);
        struct kempld_device_data *pld = gpio->pld;
 
        return !!kempld_gpio_get_bit(pld, KEMPLD_GPIO_LVL_NUM(offset), offset);
@@ -74,8 +73,7 @@ static int kempld_gpio_get(struct gpio_chip *chip, unsigned offset)
 
 static void kempld_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 {
-       struct kempld_gpio_data *gpio
-               = container_of(chip, struct kempld_gpio_data, chip);
+       struct kempld_gpio_data *gpio = gpiochip_get_data(chip);
        struct kempld_device_data *pld = gpio->pld;
 
        kempld_get_mutex(pld);
@@ -85,8 +83,7 @@ static void kempld_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 
 static int kempld_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 {
-       struct kempld_gpio_data *gpio
-               = container_of(chip, struct kempld_gpio_data, chip);
+       struct kempld_gpio_data *gpio = gpiochip_get_data(chip);
        struct kempld_device_data *pld = gpio->pld;
 
        kempld_get_mutex(pld);
@@ -99,8 +96,7 @@ static int kempld_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 static int kempld_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
                                        int value)
 {
-       struct kempld_gpio_data *gpio
-               = container_of(chip, struct kempld_gpio_data, chip);
+       struct kempld_gpio_data *gpio = gpiochip_get_data(chip);
        struct kempld_device_data *pld = gpio->pld;
 
        kempld_get_mutex(pld);
@@ -113,8 +109,7 @@ static int kempld_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 
 static int kempld_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
-       struct kempld_gpio_data *gpio
-               = container_of(chip, struct kempld_gpio_data, chip);
+       struct kempld_gpio_data *gpio = gpiochip_get_data(chip);
        struct kempld_device_data *pld = gpio->pld;
 
        return !kempld_gpio_get_bit(pld, KEMPLD_GPIO_DIR_NUM(offset), offset);
@@ -183,7 +178,7 @@ static int kempld_gpio_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
-       ret = gpiochip_add(chip);
+       ret = gpiochip_add_data(chip, gpio);
        if (ret) {
                dev_err(dev, "Could not register GPIO chip\n");
                return ret;