linux-kernel - Re: [PATCH v2] gpiolib: Add stubs for GPIO lookup functions

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Date: Tue, 26 Mar 2024 12:59:57 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Mark Brown <broonie@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] gpiolib: Add stubs for GPIO lookup functions

On Mon, Mar 25, 2024 at 6:01 PM Mark Brown <broonie@...nel.org> wrote:
>
> The gpio_device_find_by_() functions do not have stubs which means that if
> they are referenced from code with an optiona dependency on gpiolib then
> the code will fail to link. Add stubs for lookups via fwnode and label. I
> have not added a stub for plain gpio_device_find() since it seems harder to
> see a use case for that which does not depend on gpiolib.
>
> With the addition of the GPIO reset controller (which lacks a gpiolib
> dependency) to the arm64 defconfig this is causing build breaks for arm64
> virtconfig in -next:
>
> aarch64-linux-gnu-ld: drivers/reset/core.o: in function `__reset_add_reset_gpio_lookup':
>  /build/stage/linux/drivers/reset/core.c:861:(.text+0xccc): undefined reference to `gpio_device_find_by_fwnode'
>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Signed-off-by: Mark Brown <broonie@...nel.org>
> ---

Applied, thanks!

Bart