Re: [PATCH] gpiolib: of: Use correct fwnode for DT-probed chips

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

On Fri, Nov 11, 2022 at 12:37:32PM +0100, Thierry Reding wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
> 
> The OF node store in chip->fwnode is used to explicitly override the FW
> node for a GPIO chip. For chips that use the default FW node (i.e. that
> of their parent device), this will be NULL and cause the chip not to be
> fully registered.
> 
> Instead, use the GPIO device's FW node, which is set to either the node
> of the parent device or the explicit override in chip->fwnode.

Thank you!

Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

P.S.
It's good we have this report, which means I have to reconsider the
followup I'm cooking. In any case I will send it after v6.2-rc1 for
broader testing.

> Fixes: 8afe82550240 ("gpiolib: of: Prepare of_gpiochip_add() / of_gpiochip_remove() for fwnode")
> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
>  drivers/gpio/gpiolib-of.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
> index 4be3c21aa718..55c3712592db 100644
> --- a/drivers/gpio/gpiolib-of.c
> +++ b/drivers/gpio/gpiolib-of.c
> @@ -1067,7 +1067,7 @@ int of_gpiochip_add(struct gpio_chip *chip)
>  	struct device_node *np;
>  	int ret;
>  
> -	np = to_of_node(chip->fwnode);
> +	np = to_of_node(dev_fwnode(&chip->gpiodev->dev));
>  	if (!np)
>  		return 0;
>  
> -- 
> 2.38.1
> 

-- 
With Best Regards,
Andy Shevchenko