Commit d19f6451 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski
Browse files

gpio: export gpiod_hwgpio() 



Reading the GPIO hardware number from a descriptor is a valid use-case
outside of the GPIO core. Export the symbol to consumers of GPIO
descriptors.

Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarAndrew Jeffery <andrew@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20251016-aspeed-gpiolib-include-v1-2-31201c06d124@linaro.org


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent df900536

drivers/gpio/gpiolib.c

+13 −0
Original line number Diff line number Diff line
@@ -235,6 +235,19 @@ int desc_to_gpio(const struct gpio_desc *desc) 
}

EXPORT_SYMBOL_GPL(desc_to_gpio);



/**

 * gpiod_hwgpio - Return the GPIO number of the passed descriptor relative to

 *                its chip.

 * @desc: GPIO descriptor

 *

 * Returns:

 * Hardware offset of the GPIO represented by the descriptor.

 */

int gpiod_hwgpio(const struct gpio_desc *desc)

{

	return desc - &desc->gdev->descs[0];

}

EXPORT_SYMBOL_GPL(gpiod_hwgpio);



/**

 * gpiod_to_chip - Return the GPIO chip to which a GPIO descriptor belongs

drivers/gpio/gpiolib.h

+0 −8
Original line number Diff line number Diff line
@@ -273,14 +273,6 @@ int gpiochip_get_ngpios(struct gpio_chip *gc, struct device *dev); 
struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);

const char *gpiod_get_label(struct gpio_desc *desc);



/*

 * Return the GPIO number of the passed descriptor relative to its chip

 */

static inline int gpiod_hwgpio(const struct gpio_desc *desc)

{

	return desc - &desc->gdev->descs[0];

}



/* With descriptor prefix */



#define __gpiod_pr(level, desc, fmt, ...) \

include/linux/gpio/consumer.h

+2 −0
Original line number Diff line number Diff line
@@ -171,6 +171,8 @@ int gpiod_set_consumer_name(struct gpio_desc *desc, const char *name); 
struct gpio_desc *gpio_to_desc(unsigned gpio);

int desc_to_gpio(const struct gpio_desc *desc);



int gpiod_hwgpio(const struct gpio_desc *desc);



struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,

					 const char *con_id, int index,

					 enum gpiod_flags flags,