diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-09-27 17:29:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 02:35:39 +0300 |
| commit | 799233ad1eb8666a83179ef9ebe77a3e37c931bb (patch) | |
| tree | d3eeca258f0b2434b5f6062e8c73b7512e773eca | |
| parent | 9b0cc30d26c32432b334ee7a5fc11b9d401c0a85 (diff) | |
| download | linux-799233ad1eb8666a83179ef9ebe77a3e37c931bb.tar.xz | |
gpiolib: make gpio_device_get() and gpio_device_put() public
[ Upstream commit 36aa129f221c9070afd8dff03154ab49702a5b1b ]
In order to start migrating away from accessing struct gpio_chip by
users other than their owners, let's first make the reference management
functions for the opaque struct gpio_device public in the driver.h
header.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Stable-dep-of: 48e1b4d369cf ("gpiolib: remove the GPIO device from the list when it's unregistered")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpio/gpiolib.c | 24 | ||||
| -rw-r--r-- | drivers/gpio/gpiolib.h | 10 | ||||
| -rw-r--r-- | include/linux/gpio/driver.h | 3 |
3 files changed, 27 insertions, 10 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 40a0022ea719..c2b40d7138fa 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1058,6 +1058,30 @@ static struct gpio_chip *find_chip_by_name(const char *name) return gpiochip_find((void *)name, gpiochip_match_name); } +/** + * gpio_device_get() - Increase the reference count of this GPIO device + * @gdev: GPIO device to increase the refcount for + * + * Returns: + * Pointer to @gdev. + */ +struct gpio_device *gpio_device_get(struct gpio_device *gdev) +{ + return to_gpio_device(get_device(&gdev->dev)); +} +EXPORT_SYMBOL_GPL(gpio_device_get); + +/** + * gpio_device_put() - Decrease the reference count of this GPIO device and + * possibly free all resources associated with it. + * @gdev: GPIO device to decrease the reference count for + */ +void gpio_device_put(struct gpio_device *gdev) +{ + put_device(&gdev->dev); +} +EXPORT_SYMBOL_GPL(gpio_device_put); + #ifdef CONFIG_GPIOLIB_IRQCHIP /* diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index a0a67569300b..aa1926083689 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -86,16 +86,6 @@ static inline struct gpio_device *to_gpio_device(struct device *dev) return container_of(dev, struct gpio_device, dev); } -static inline struct gpio_device *gpio_device_get(struct gpio_device *gdev) -{ - return to_gpio_device(get_device(&gdev->dev)); -} - -static inline void gpio_device_put(struct gpio_device *gdev) -{ - put_device(&gdev->dev); -} - /* gpio suffixes used for ACPI and device tree lookup */ static __maybe_unused const char * const gpio_suffixes[] = { "gpios", "gpio" }; diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 4f0c5d62c8f3..64c214317a83 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -607,6 +607,9 @@ extern int devm_gpiochip_add_data_with_key(struct device *dev, struct gpio_chip extern struct gpio_chip *gpiochip_find(void *data, int (*match)(struct gpio_chip *gc, void *data)); +struct gpio_device *gpio_device_get(struct gpio_device *gdev); +void gpio_device_put(struct gpio_device *gdev); + bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset); int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset); void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset); |