linux-kernel - Re: [PATCH] pinctrl: stm32: handle semaphore acquisition when handling pinctrl/pinmux

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Message-ID: <CACRpkdZcqM5JzvoTUk+cAFrtvQjHdRiaV0MF8ZipPTWxfqBxZg@mail.gmail.com>
Date: Mon, 10 Nov 2025 23:59:21 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Gatien Chevallier <gatien.chevallier@...s.st.com>
Cc: Antonio Borneo <antonio.borneo@...s.st.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, 
	Alexandre Torgue <alexandre.torgue@...s.st.com>, linux-gpio@...r.kernel.org, 
	linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: stm32: handle semaphore acquisition when
 handling pinctrl/pinmux

On Wed, Nov 5, 2025 at 11:50 AM Gatien Chevallier
<gatien.chevallier@...s.st.com> wrote:

> When a GPIO RIF configuration is in semaphore mode, and the semaphore
> hasn't been taken before configuring the GPIO, the write operations
> silently fail.
>
> To avoid a silent fail when applying a pinctrl, if the pins that are
> being configured are in semaphore mode, take the semaphore. Note that
> there is no proper release of the RIF semaphore yet for pinctrl.
>
> Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>

Patch applied.

Yours,
Linus Walleij