From: Miao Wang <[email protected]> Add a helper function to retrieve the fwnode associated with a struct gpio_device. This is useful for drivers that need to access the fwnode of a GPIO device for various purposes, such as creating software nodes or handling GPIOs in a platform-specific manner.
Acked-by: Bartosz Golaszewski <[email protected]> Signed-off-by: Miao Wang <[email protected]> --- drivers/gpio/gpiolib.c | 17 +++++++++++++++++ include/linux/gpio/driver.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index e5fb60111151f6de20b424551acf213fb058e190..bf3e7f67a90f576d137fd7261b0afc741eea3245 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1583,6 +1583,23 @@ struct device *gpio_device_to_device(struct gpio_device *gdev) } EXPORT_SYMBOL_GPL(gpio_device_to_device); +/** + * gpio_device_get_fwnode() - Retrieve the fwnode of the underlying device. + * @gdev: GPIO device for which to return the fwnode. + * + * This does not increase the reference count of the GPIO device nor the + * returned fwnode handle, since the caller is expected to hold a reference + * to the GPIO device, and fwnode_handle_put() is thus not needed. + * + * Returns: + * The fwnode handle of the underlying device. + */ +struct fwnode_handle *gpio_device_get_fwnode(struct gpio_device *gdev) +{ + return dev_fwnode(gpio_device_to_device(gdev)); +} +EXPORT_SYMBOL_GPL(gpio_device_get_fwnode); + #ifdef CONFIG_GPIOLIB_IRQCHIP /* diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 17511434ed077dde8807bd7630c342e146e5230b..4dd9120707ec72a978f5f916cc5473a91b65d2b9 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -641,6 +641,7 @@ DEFINE_FREE(gpio_device_put, struct gpio_device *, if (!IS_ERR_OR_NULL(_T)) gpio_device_put(_T)) struct device *gpio_device_to_device(struct gpio_device *gdev); +struct fwnode_handle *gpio_device_get_fwnode(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); -- 2.49.0 _______________________________________________ Openipmi-developer mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/openipmi-developer
