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gpio: move the subdriver data pointer into gpio_device

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We move to manage this pointer under gpiolib control rather than
leave it in the subdevice's gpio_chip. We can not NULL it after
gpiochip_remove so at to keep things tight.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij
2016-02-11 11:37:48 +01:00
parent 20ec3e39fc
commit 43c54ecade
3 changed files with 18 additions and 8 deletions
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7
include/linux/gpio/driver.h
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@@ -25,7 +25,6 @@ struct gpio_device;
* @gpiodev: the internal state holder, opaque struct
* @parent: optional parent device providing the GPIOs
* @owner: helps prevent removal of modules exporting active GPIOs
* @data: per-instance data assigned by the driver
* @request: optional hook for chip-specific activation, such as
* enabling module power and clock; may sleep
* @free: optional hook for chip-specific deactivation, such as
@@ -109,7 +108,6 @@ struct gpio_chip {
struct gpio_device *gpiodev;
struct device *parent;
struct module *owner;
void *data;
int (*request)(struct gpio_chip *chip,
unsigned offset);
@@ -202,10 +200,7 @@ void gpiochip_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
bool gpiochip_line_is_irq(struct gpio_chip *chip, unsigned int offset);
/* get driver data */
static inline void *gpiochip_get_data(struct gpio_chip *chip)
{
return chip->data;
}
void *gpiochip_get_data(struct gpio_chip *chip);
struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);