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gpio: cs5535: 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: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2015-12-04 15:53:04 +01:00
parent 435cc3d428
commit c634fc19fe
1 changed files with 8 additions and 7 deletions
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15
drivers/gpio/gpio-cs5535.c
View File

@ -42,6 +42,10 @@ static ulong mask = GPIO_DEFAULT_MASK;
module_param_named(mask, mask, ulong, 0444);
MODULE_PARM_DESC(mask, "GPIO channel mask.");
/*
* FIXME: convert this singleton driver to use the state container
* design pattern, see Documentation/driver-model/design-patterns.txt
*/
static struct cs5535_gpio_chip {
struct gpio_chip chip;
resource_size_t base;
@ -201,8 +205,7 @@ EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event);
static int chip_gpio_request(struct gpio_chip *c, unsigned offset)
{
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
struct cs5535_gpio_chip *chip = gpiochip_get_data(c);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
@ -242,8 +245,7 @@ static void chip_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
static int chip_direction_input(struct gpio_chip *c, unsigned offset)
{
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
struct cs5535_gpio_chip *chip = gpiochip_get_data(c);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
@ -256,8 +258,7 @@ static int chip_direction_input(struct gpio_chip *c, unsigned offset)
static int chip_direction_output(struct gpio_chip *c, unsigned offset, int val)
{
struct cs5535_gpio_chip *chip =
container_of(c, struct cs5535_gpio_chip, chip);
struct cs5535_gpio_chip *chip = gpiochip_get_data(c);
unsigned long flags;
spin_lock_irqsave(&chip->lock, flags);
@ -347,7 +348,7 @@ static int cs5535_gpio_probe(struct platform_device *pdev)
mask_orig, mask);
/* finally, register with the generic GPIO API */
err = gpiochip_add(&cs5535_gpio_chip.chip);
err = gpiochip_add_data(&cs5535_gpio_chip.chip, &cs5535_gpio_chip);
if (err)
goto done;