Re: [PATCH] gpiolib: Extend software-node support to support secondary software-nodes

Hi Hans,

On Sat, Sep 13, 2025 at 08:43:09PM +0200, Hans de Goede wrote:

When a software-node gets added to a device which already has another fwnode as primary node it will become the secondary fwnode for that device.

Currently if a software-node with GPIO properties ends up as the secondary fwnode then gpiod_find_by_fwnode() will fail to find the GPIOs.

Add a check to gpiod_find_by_fwnode() to try a software-node lookup on the secondary fwnode if the GPIO was not found in the primary fwnode.

Thanks for catching this. I think it would be better if we added handling of the secondary node to gpiod_find_and_request(). This way the fallback will work for all kind of combinations, even if secondary node happens to be an OF or ACPI one.

Thanks.