Hi Andy,
On Fri, Mar 25, 2022 at 9:04 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
> The gpiochip_count() helper iterates over the device child nodes that have
> the "gpio-controller" property set. It returns the number of such nodes
> under given device.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Thanks for your patch!
> --- a/include/linux/gpio/driver.h
> +++ b/include/linux/gpio/driver.h
> @@ -750,4 +751,17 @@ static inline void gpiochip_unlock_as_irq(struct gpio_chip *gc,
> }
> #endif /* CONFIG_GPIOLIB */
>
> +static inline unsigned int gpiochip_count(struct device *dev)
> +{
> + struct fwnode_handle *child;
> + unsigned int count = 0;
> +
> + device_for_each_child_node(dev, child) {
> + if (device_property_read_bool(child, "gpio-controller"))
error: passing argument 1 of ‘device_property_read_bool’ from
incompatible pointer type [-Werror=incompatible-pointer-types]
So I'm afraid I cannot test patch 3/5 yet ;-)
> + count++;
> + }
> +
> + return count;
> +}
> +
> #endif /* __LINUX_GPIO_DRIVER_H */
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
