gpio: zynq: 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: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-zynq.c

@@ -131,11 +131,6 @@ struct zynq_platform_data {
 static struct irq_chip zynq_gpio_level_irqchip;
 static struct irq_chip zynq_gpio_edge_irqchip;
 
-static struct zynq_gpio *to_zynq_gpio(struct gpio_chip *gc)
-{
-	return container_of(gc, struct zynq_gpio, chip);
-}
-
 /**
  * zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
  * for a given pin in the GPIO device
@@ -183,7 +178,7 @@ static int zynq_gpio_get_value(struct gpio_chip *chip, unsigned int pin)
 {
 	u32 data;
 	unsigned int bank_num, bank_pin_num;
-	struct zynq_gpio *gpio = to_zynq_gpio(chip);
+	struct zynq_gpio *gpio = gpiochip_get_data(chip);
 
 	zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
 
@@ -207,7 +202,7 @@ static void zynq_gpio_set_value(struct gpio_chip *chip, unsigned int pin,
 				int state)
 {
 	unsigned int reg_offset, bank_num, bank_pin_num;
-	struct zynq_gpio *gpio = to_zynq_gpio(chip);
+	struct zynq_gpio *gpio = gpiochip_get_data(chip);
 
 	zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
 
@@ -244,7 +239,7 @@ static int zynq_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
 {
 	u32 reg;
 	unsigned int bank_num, bank_pin_num;
-	struct zynq_gpio *gpio = to_zynq_gpio(chip);
+	struct zynq_gpio *gpio = gpiochip_get_data(chip);
 
 	zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
 
@@ -277,7 +272,7 @@ static int zynq_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,
 {
 	u32 reg;
 	unsigned int bank_num, bank_pin_num;
-	struct zynq_gpio *gpio = to_zynq_gpio(chip);
+	struct zynq_gpio *gpio = gpiochip_get_data(chip);
 
 	zynq_gpio_get_bank_pin(pin, &bank_num, &bank_pin_num, gpio);
 
@@ -308,7 +303,7 @@ static void zynq_gpio_irq_mask(struct irq_data *irq_data)
 {
 	unsigned int device_pin_num, bank_num, bank_pin_num;
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
+		gpiochip_get_data(irq_data_get_irq_chip_data(irq_data));
 
 	device_pin_num = irq_data->hwirq;
 	zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
@@ -329,7 +324,7 @@ static void zynq_gpio_irq_unmask(struct irq_data *irq_data)
 {
 	unsigned int device_pin_num, bank_num, bank_pin_num;
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
+		gpiochip_get_data(irq_data_get_irq_chip_data(irq_data));
 
 	device_pin_num = irq_data->hwirq;
 	zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
@@ -349,7 +344,7 @@ static void zynq_gpio_irq_ack(struct irq_data *irq_data)
 {
 	unsigned int device_pin_num, bank_num, bank_pin_num;
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
+		gpiochip_get_data(irq_data_get_irq_chip_data(irq_data));
 
 	device_pin_num = irq_data->hwirq;
 	zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
@@ -400,7 +395,7 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
 	u32 int_type, int_pol, int_any;
 	unsigned int device_pin_num, bank_num, bank_pin_num;
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_data_get_irq_chip_data(irq_data));
+		gpiochip_get_data(irq_data_get_irq_chip_data(irq_data));
 
 	device_pin_num = irq_data->hwirq;
 	zynq_gpio_get_bank_pin(device_pin_num, &bank_num, &bank_pin_num, gpio);
@@ -464,7 +459,7 @@ static int zynq_gpio_set_irq_type(struct irq_data *irq_data, unsigned int type)
 static int zynq_gpio_set_wake(struct irq_data *data, unsigned int on)
 {
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_data_get_irq_chip_data(data));
+		gpiochip_get_data(irq_data_get_irq_chip_data(data));
 
 	irq_set_irq_wake(gpio->irq, on);
 
@@ -530,7 +525,7 @@ static void zynq_gpio_irqhandler(struct irq_desc *desc)
 	u32 int_sts, int_enb;
 	unsigned int bank_num;
 	struct zynq_gpio *gpio =
-		to_zynq_gpio(irq_desc_get_handler_data(desc));
+		gpiochip_get_data(irq_desc_get_handler_data(desc));
 	struct irq_chip *irqchip = irq_desc_get_chip(desc);
 
 	chained_irq_enter(irqchip, desc);
@@ -721,7 +716,7 @@ static int zynq_gpio_probe(struct platform_device *pdev)
 		return ret;
 
 	/* report a bug if gpio chip registration fails */
-	ret = gpiochip_add(chip);
+	ret = gpiochip_add_data(chip, gpio);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to add gpio chip\n");
 		goto err_pm_put;