[PATCH v1 1/1] gpiolib: devres: Get rid of unused devm_gpio_free()

From: Andy Shevchenko
Date: Wed Jun 22 2022 - 13:28:50 EST


The last user, which in fact was a dead code, has gone a year ago,
previous one 3 years ago. On top of that we want to drop away the
legacy GPIO APIs in the kernel, so take a chance to get rid of
unused devm_gpio_free() and accompanying stuff.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
.../driver-api/driver-model/devres.rst | 1 -
drivers/gpio/gpiolib-devres.c | 32 -------------------
include/linux/gpio.h | 6 ----
3 files changed, 39 deletions(-)

diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 2d39967bafcc..55272942e721 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -277,7 +277,6 @@ GPIO
devm_gpiochip_add_data()
devm_gpio_request()
devm_gpio_request_one()
- devm_gpio_free()

I2C
devm_i2c_new_dummy_device()
diff --git a/drivers/gpio/gpiolib-devres.c b/drivers/gpio/gpiolib-devres.c
index 79da85d17b71..16a696249229 100644
--- a/drivers/gpio/gpiolib-devres.c
+++ b/drivers/gpio/gpiolib-devres.c
@@ -375,9 +375,6 @@ void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs)
}
EXPORT_SYMBOL_GPL(devm_gpiod_put_array);

-
-
-
static void devm_gpio_release(struct device *dev, void *res)
{
unsigned *gpio = res;
@@ -385,13 +382,6 @@ static void devm_gpio_release(struct device *dev, void *res)
gpio_free(*gpio);
}

-static int devm_gpio_match(struct device *dev, void *res, void *data)
-{
- unsigned *this = res, *gpio = data;
-
- return *this == *gpio;
-}
-
/**
* devm_gpio_request - request a GPIO for a managed device
* @dev: device to request the GPIO for
@@ -402,11 +392,7 @@ static int devm_gpio_match(struct device *dev, void *res, void *data)
* same arguments and performs the same function as
* gpio_request(). GPIOs requested with this function will be
* automatically freed on driver detach.
- *
- * If an GPIO allocated with this function needs to be freed
- * separately, devm_gpio_free() must be used.
*/
-
int devm_gpio_request(struct device *dev, unsigned gpio, const char *label)
{
unsigned *dr;
@@ -459,24 +445,6 @@ int devm_gpio_request_one(struct device *dev, unsigned gpio,
}
EXPORT_SYMBOL_GPL(devm_gpio_request_one);

-/**
- * devm_gpio_free - free a GPIO
- * @dev: device to free GPIO for
- * @gpio: GPIO to free
- *
- * Except for the extra @dev argument, this function takes the
- * same arguments and performs the same function as gpio_free().
- * This function instead of gpio_free() should be used to manually
- * free GPIOs allocated with devm_gpio_request().
- */
-void devm_gpio_free(struct device *dev, unsigned int gpio)
-{
-
- WARN_ON(devres_release(dev, devm_gpio_release, devm_gpio_match,
- &gpio));
-}
-EXPORT_SYMBOL_GPL(devm_gpio_free);
-
static void devm_gpio_chip_release(void *data)
{
struct gpio_chip *gc = data;
diff --git a/include/linux/gpio.h b/include/linux/gpio.h
index 008ad3ee56b7..a370387fa406 100644
--- a/include/linux/gpio.h
+++ b/include/linux/gpio.h
@@ -95,7 +95,6 @@ struct device;
int devm_gpio_request(struct device *dev, unsigned gpio, const char *label);
int devm_gpio_request_one(struct device *dev, unsigned gpio,
unsigned long flags, const char *label);
-void devm_gpio_free(struct device *dev, unsigned int gpio);

#else /* ! CONFIG_GPIOLIB */

@@ -240,11 +239,6 @@ static inline int devm_gpio_request_one(struct device *dev, unsigned gpio,
return -EINVAL;
}

-static inline void devm_gpio_free(struct device *dev, unsigned int gpio)
-{
- WARN_ON(1);
-}
-
#endif /* ! CONFIG_GPIOLIB */

#endif /* __LINUX_GPIO_H */
--
2.35.1