linux-kernel - Re: [PATCH v3] gpio: reg: use new GPIO line value setter callbacks

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Message-Id: <0d5be287-e11b-405d-87ed-972a198f00e9@app.fastmail.com>
Date: Fri, 04 Jul 2025 15:03:49 +0200
From: "Arnd Bergmann" <arnd@...nel.org>
To: "Bartosz Golaszewski" <brgl@...ev.pl>,
 "Russell King" <linux@...linux.org.uk>,
 "Linus Walleij" <linus.walleij@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
 "Bartosz Golaszewski" <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v3] gpio: reg: use new GPIO line value setter callbacks

On Mon, Jun 23, 2025, at 09:57, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the legacy generic
> gpio-reg module to using them. We have to update the two legacy ARM
> platforms that use it at the same time as they call the set_multiple()
> callbacks directly (they shouldn't but it's old technical debt I
> suppose).
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
> Commit 98ce1eb1fd87e ("gpiolib: introduce gpio_chip setters that return
> values") added new line setter callbacks to struct gpio_chip. They allow
> to indicate failures to callers. We're in the process of converting all
> GPIO controllers to using them before removing the old ones. This is the
> last remaining patch from a bigger series that already went into
> linux-next. The idea is for the ARM changes to be Acked by Arnd or
> Russell and routed through the GPIO tree.

Acked-by: Arnd Bergmann <arnd@...db.de>