linux-kernel - Re: [PATCH] pinctrl: add CONFIG_OF dependencies for microchip drivers

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Message-Id: <1722bf4d-2974-4b17-a333-515d4242fb90@app.fastmail.com>
Date: Thu, 04 Dec 2025 14:44:36 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>,
 "Arnd Bergmann" <arnd@...nel.org>
Cc: "Linus Walleij" <linusw@...nel.org>,
 "Conor.Dooley" <conor.dooley@...rochip.com>,
 "Bartosz Golaszewski" <brgl@...nel.org>,
 "Yulin Lu" <luyulin@...incomputing.com>,
 "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: add CONFIG_OF dependencies for microchip drivers

On Thu, Dec 4, 2025, at 13:11, Andy Shevchenko wrote:
> On Thu, Dec 04, 2025 at 10:50:14AM +0100, Arnd Bergmann wrote:
>> 
>> The two newly added drivers fail to link on builds without
>> CONFIG_OF:
>> 
>> x86_64-linux-ld: drivers/pinctrl/pinctrl-pic64gx-gpio2.o: in function `pinconf_generic_dt_node_to_map_all':
>> pinctrl-pic64gx-gpio2.c:(.text+0xc9): undefined reference to `pinconf_generic_dt_node_to_map'
>> x86_64-linux-ld: drivers/pinctrl/pinctrl-mpfs-iomux0.o: in function `pinconf_generic_dt_node_to_map_all':
>> pinctrl-mpfs-iomux0.c:(.text+0xc9): undefined reference to `pinconf_generic_dt_node_to_map'
>> 
>> Add a Kconfig dependencies.
>
> This will reduce the compile test base. In other drivers we usually put
> ifdeffery in the code.

I usually prefer the Kconfig dependency: It's still covered by
both allmodconfig and half the randconfig tests on the few
architectures that don't already require CONFIG_OF on all builds.

      Arnd