[PATCH v2 02/13] gpiolib: Introduce gpiochip_node_count() helper

[Geert Uytterhoeven]

Hi Andy,

On Tue, Mar 29, 2022 at 5:29 PM Andy Shevchenko
<andriy.shevchenko at linux.intel.com> 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 at linux.intel.com>

Thanks for your patch!

> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -755,4 +755,16 @@ 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;

Preinitialize to zero?

> +
> +       count = 0;
> +       for_each_gpiochip_node(dev, child)
> +               count++;
> +
> +       return count;
> +}
> +
>  #endif /* __LINUX_GPIO_DRIVER_H */

Regardless:
Reviewed-by: Geert Uytterhoeven <geert+renesas at glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas at glider.be>

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds