gpio: bcm-kona: 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: Markus Mayer <markus.mayer@linaro.org>
Cc: Tim Kryger <tim.kryger@linaro.org>
Cc: Matt Porter <matt.porter@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-bcm-kona.c

@@ -78,11 +78,6 @@ struct bcm_kona_gpio_bank {
 	struct bcm_kona_gpio *kona_gpio;
 };
 
-static inline struct bcm_kona_gpio *to_kona_gpio(struct gpio_chip *chip)
-{
-	return container_of(chip, struct bcm_kona_gpio, gpio_chip);
-}
-
 static inline void bcm_kona_gpio_write_lock_regs(void __iomem *reg_base,
 						int bank_id, u32 lockcode)
 {
@@ -124,7 +119,7 @@ static void bcm_kona_gpio_unlock_gpio(struct bcm_kona_gpio *kona_gpio,
 
 static int bcm_kona_gpio_get_dir(struct gpio_chip *chip, unsigned gpio)
 {
-	struct bcm_kona_gpio *kona_gpio = to_kona_gpio(chip);
+	struct bcm_kona_gpio *kona_gpio = gpiochip_get_data(chip);
 	void __iomem *reg_base = kona_gpio->reg_base;
 	u32 val;
 
@@ -141,7 +136,7 @@ static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
 	u32 val, reg_offset;
 	unsigned long flags;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	reg_base = kona_gpio->reg_base;
 	spin_lock_irqsave(&kona_gpio->lock, flags);
 
@@ -168,7 +163,7 @@ static int bcm_kona_gpio_get(struct gpio_chip *chip, unsigned gpio)
 	u32 val, reg_offset;
 	unsigned long flags;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	reg_base = kona_gpio->reg_base;
 	spin_lock_irqsave(&kona_gpio->lock, flags);
 
@@ -188,7 +183,7 @@ static int bcm_kona_gpio_get(struct gpio_chip *chip, unsigned gpio)
 
 static int bcm_kona_gpio_request(struct gpio_chip *chip, unsigned gpio)
 {
-	struct bcm_kona_gpio *kona_gpio = to_kona_gpio(chip);
+	struct bcm_kona_gpio *kona_gpio = gpiochip_get_data(chip);
 
 	bcm_kona_gpio_unlock_gpio(kona_gpio, gpio);
 	return 0;
@@ -196,7 +191,7 @@ static int bcm_kona_gpio_request(struct gpio_chip *chip, unsigned gpio)
 
 static void bcm_kona_gpio_free(struct gpio_chip *chip, unsigned gpio)
 {
-	struct bcm_kona_gpio *kona_gpio = to_kona_gpio(chip);
+	struct bcm_kona_gpio *kona_gpio = gpiochip_get_data(chip);
 
 	bcm_kona_gpio_lock_gpio(kona_gpio, gpio);
 }
@@ -208,7 +203,7 @@ static int bcm_kona_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
 	u32 val;
 	unsigned long flags;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	reg_base = kona_gpio->reg_base;
 	spin_lock_irqsave(&kona_gpio->lock, flags);
 
@@ -232,7 +227,7 @@ static int bcm_kona_gpio_direction_output(struct gpio_chip *chip,
 	u32 val, reg_offset;
 	unsigned long flags;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	reg_base = kona_gpio->reg_base;
 	spin_lock_irqsave(&kona_gpio->lock, flags);
 
@@ -255,7 +250,7 @@ static int bcm_kona_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
 {
 	struct bcm_kona_gpio *kona_gpio;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	if (gpio >= kona_gpio->gpio_chip.ngpio)
 		return -ENXIO;
 	return irq_create_mapping(kona_gpio->irq_domain, gpio);
@@ -269,7 +264,7 @@ static int bcm_kona_gpio_set_debounce(struct gpio_chip *chip, unsigned gpio,
 	u32 val, res;
 	unsigned long flags;
 
-	kona_gpio = to_kona_gpio(chip);
+	kona_gpio = gpiochip_get_data(chip);
 	reg_base = kona_gpio->reg_base;
 	/* debounce must be 1-128ms (or 0) */
 	if ((debounce > 0 && debounce < 1000) || debounce > 128000) {
@@ -635,7 +630,7 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev)
 
 	bcm_kona_gpio_reset(kona_gpio);
 
-	ret = gpiochip_add(chip);
+	ret = gpiochip_add_data(chip, kona_gpio);
 	if (ret < 0) {
 		dev_err(dev, "Couldn't add GPIO chip -- %d\n", ret);
 		goto err_irq_domain;