linux-kernel - Re: [PATCH v3 09/10] dt-bindings: pinctrl: stm32: Support I/O synchronization parameters

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Message-ID: <CACRpkdbeaiNGfOFfVfDNZ=u=4yhCykcdSdHUv-td_DVyr3aWaQ@mail.gmail.com>
Date: Tue, 21 Oct 2025 00:08:53 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Antonio Borneo <antonio.borneo@...s.st.com>
Cc: Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue <alexandre.torgue@...s.st.com>, 
	Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
	linux-arm-kernel@...ts.infradead.org, 
	Christophe Roullier <christophe.roullier@...s.st.com>, 
	Fabien Dessenne <fabien.dessenne@...s.st.com>, Valentin Caron <valentin.caron@...s.st.com>
Subject: Re: [PATCH v3 09/10] dt-bindings: pinctrl: stm32: Support I/O
 synchronization parameters

On Mon, Oct 20, 2025 at 5:09 PM Antonio Borneo
<antonio.borneo@...s.st.com> wrote:

> pinconf-generic only accepts positive numeric values for
> both generic and custom properties in struct pinconf_generic_params.

Do you need it to support negative values?
Patches welcome!

> Plus, I haven't found any existing driver that mixes pinconf-generic with
> custom string values.

Maybe I misunderstand, but pinconf_generic_parse_dt_config()
looks at  pctldev->desc->custom_params and
pctldev->desc->num_custom_params found in
struct pinctrl_desc in
include/linux/pinctrl/pinctrl.h

$ git grep custom_params drivers/pinctrl/
gives you a list of all drivers using this.

Yours,
Linus Walleij