gpio: altera: 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: Tien Hock Loh <thloh@altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c
index 84a20af01a9a851080f4219fa9315944b8206908..2aeaebd1c6e7af574fca9058cd0cf758e635943b 100644 (file)
--- a/drivers/gpio/gpio-altera.c
+++ b/drivers/gpio/gpio-altera.c
@@ -42,11 +42,6 @@ struct altera_gpio_chip {
        int mapped_irq;
 };
 
-static struct altera_gpio_chip *to_altera(struct gpio_chip *gc)
-{
-       return container_of(gc, struct altera_gpio_chip, mmchip.gc);
-}
-
 static void altera_gpio_irq_unmask(struct irq_data *d)
 {
        struct altera_gpio_chip *altera_gc;
@@ -54,7 +49,7 @@ static void altera_gpio_irq_unmask(struct irq_data *d)
        unsigned long flags;
        u32 intmask;
 
-       altera_gc = to_altera(irq_data_get_irq_chip_data(d));
+       altera_gc = gpiochip_get_data(irq_data_get_irq_chip_data(d));
        mm_gc = &altera_gc->mmchip;
 
        spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -72,7 +67,7 @@ static void altera_gpio_irq_mask(struct irq_data *d)
        unsigned long flags;
        u32 intmask;
 
-       altera_gc = to_altera(irq_data_get_irq_chip_data(d));
+       altera_gc = gpiochip_get_data(irq_data_get_irq_chip_data(d));
        mm_gc = &altera_gc->mmchip;
 
        spin_lock_irqsave(&altera_gc->gpio_lock, flags);
@@ -92,7 +87,7 @@ static int altera_gpio_irq_set_type(struct irq_data *d,
 {
        struct altera_gpio_chip *altera_gc;
 
-       altera_gc = to_altera(irq_data_get_irq_chip_data(d));
+       altera_gc = gpiochip_get_data(irq_data_get_irq_chip_data(d));
 
        if (type == IRQ_TYPE_NONE)
                return 0;
@@ -145,7 +140,7 @@ static void altera_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
        unsigned int data_reg;
 
        mm_gc = to_of_mm_gpio_chip(gc);
-       chip = container_of(mm_gc, struct altera_gpio_chip, mmchip);
+       chip = gpiochip_get_data(gc);
 
        spin_lock_irqsave(&chip->gpio_lock, flags);
        data_reg = readl(mm_gc->regs + ALTERA_GPIO_DATA);
@@ -165,7 +160,7 @@ static int altera_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
        unsigned int gpio_ddr;
 
        mm_gc = to_of_mm_gpio_chip(gc);
-       chip = container_of(mm_gc, struct altera_gpio_chip, mmchip);
+       chip = gpiochip_get_data(gc);
 
        spin_lock_irqsave(&chip->gpio_lock, flags);
        /* Set pin as input, assumes software controlled IP */
@@ -186,7 +181,7 @@ static int altera_gpio_direction_output(struct gpio_chip *gc,
        unsigned int data_reg, gpio_ddr;
 
        mm_gc = to_of_mm_gpio_chip(gc);
-       chip = container_of(mm_gc, struct altera_gpio_chip, mmchip);
+       chip = gpiochip_get_data(gc);
 
        spin_lock_irqsave(&chip->gpio_lock, flags);
        /* Sets the GPIO value */
@@ -215,7 +210,7 @@ static void altera_gpio_irq_edge_handler(struct irq_desc *desc)
        unsigned long status;
        int i;
 
-       altera_gc = to_altera(irq_desc_get_handler_data(desc));
+       altera_gc = gpiochip_get_data(irq_desc_get_handler_data(desc));
        chip = irq_desc_get_chip(desc);
        mm_gc = &altera_gc->mmchip;
        irqdomain = altera_gc->mmchip.gc.irqdomain;
@@ -244,7 +239,7 @@ static void altera_gpio_irq_leveL_high_handler(struct irq_desc *desc)
        unsigned long status;
        int i;
 
-       altera_gc = to_altera(irq_desc_get_handler_data(desc));
+       altera_gc = gpiochip_get_data(irq_desc_get_handler_data(desc));
        chip = irq_desc_get_chip(desc);
        mm_gc = &altera_gc->mmchip;
        irqdomain = altera_gc->mmchip.gc.irqdomain;
@@ -292,7 +287,7 @@ static int altera_gpio_probe(struct platform_device *pdev)
        altera_gc->mmchip.gc.owner              = THIS_MODULE;
        altera_gc->mmchip.gc.parent             = &pdev->dev;
 
-       ret = of_mm_gpiochip_add(node, &altera_gc->mmchip);
+       ret = of_mm_gpiochip_add_data(node, &altera_gc->mmchip, altera_gc);
        if (ret) {
                dev_err(&pdev->dev, "Failed adding memory mapped gpiochip\n");
                return ret;