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gpio: lpc18xx: 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().

Acked-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Linus Walleij 2015-12-07 09:13:57 +01:00
parent a2f3380465
commit d3de31d467
1 changed files with 4 additions and 9 deletions
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13
drivers/gpio/gpio-lpc18xx.c
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@ -31,27 +31,22 @@ struct lpc18xx_gpio_chip {
spinlock_t lock;
};
static inline struct lpc18xx_gpio_chip *to_lpc18xx_gpio(struct gpio_chip *chip)
{
return container_of(chip, struct lpc18xx_gpio_chip, gpio);
}
static void lpc18xx_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
struct lpc18xx_gpio_chip *gc = gpiochip_get_data(chip);
writeb(value ? 1 : 0, gc->base + offset);
}
static int lpc18xx_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
struct lpc18xx_gpio_chip *gc = gpiochip_get_data(chip);
return !!readb(gc->base + offset);
}
static int lpc18xx_gpio_direction(struct gpio_chip *chip, unsigned offset,
bool out)
{
struct lpc18xx_gpio_chip *gc = to_lpc18xx_gpio(chip);
struct lpc18xx_gpio_chip *gc = gpiochip_get_data(chip);
unsigned long flags;
u32 port, pin, dir;
@ -129,7 +124,7 @@ static int lpc18xx_gpio_probe(struct platform_device *pdev)
gc->gpio.parent = &pdev->dev;
ret = gpiochip_add(&gc->gpio);
ret = gpiochip_add_data(&gc->gpio, gc);
if (ret) {
dev_err(&pdev->dev, "failed to add gpio chip\n");
clk_disable_unprepare(gc->clk);