On Fri, Apr 1, 2022 at 12:36 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> The gpiochip_node_count() helper iterates over the device child nodes that
> have the "gpio-controller" property set. It returns the number of such nodes
> under a given device.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> include/linux/gpio/driver.h | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
> index bfc91f122d5f..12de0b22b4ef 100644
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -755,4 +755,15 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc,
> device_for_each_child_node(dev, child) \
> if (!fwnode_property_present(child, "gpio-controller")) {} else
>
> +static inline unsigned int gpiochip_node_count(struct device *dev)
> +{
> + struct fwnode_handle *child;
> + unsigned int count = 0;
> +
> + for_each_gpiochip_node(dev, child)
> + count++;
> +
> + return count;
> +}
> +
> #endif /* __LINUX_GPIO_DRIVER_H */
> --
> 2.35.1
>
Acked-by: Bartosz Golaszewski <brgl@xxxxxxxx>
