linux-kernel - Re: [PATCH v3 3/3] ARM64: dts: add ngpios for vf610 compatible gpio controllers

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Message-ID: <aFOJ1OXvpEP8gaxL@dragon>
Date: Thu, 19 Jun 2025 11:53:56 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Haibo Chen <haibo.chen@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Stefan Agner <stefan@...er.ch>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	peng.fan@....com, wahrenst@....net, conor@...nel.org,
	Frank Li <Frank.Li@....com>
Subject: Re: [PATCH v3 3/3] ARM64: dts: add ngpios for vf610 compatible gpio
 controllers

On Tue, May 20, 2025 at 11:46:14AM +0800, Haibo Chen wrote:
> After commit da5dd31efd24 ("gpio: vf610: Switch to gpio-mmio"),
> the vf610 GPIO driver no longer uses the static number 32 for
> gc->ngpio. This allows users to configure the number of GPIOs
> per port.
> 
> And some gpio controllers did have less pads. So add 'ngpios' here,
> this can save some memory when request bitmap, and also show user
> more accurate information when use gpio tools.
> 
> Besides, some gpio controllers have hole in the gpio ranges, so use
> 'gpio-reserved-ranges' to cover that, then the gpioinfo tool show the
> correct result.
> 
> Reviewed-by: Frank Li <Frank.Li@....com>
> Signed-off-by: Haibo Chen <haibo.chen@....com>

Historically we use "ARM: dts: ..." prefix for arch/arm/boot/dts changes,
but use "arm64: dts: ..." for arch/arm64/boot/dts ones.

Fixed the prefix up and applied, thanks!

Shawn