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

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Message-ID: <6ed543af-99e4-4710-9e3e-477e178b7c8e@gmx.net>
Date: Wed, 21 May 2025 10:44:54 +0200
From: Stefan Wahren <wahrenst@....net>
To: Haibo Chen <haibo.chen@....com>, 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>
Cc: 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, conor@...nel.org,
 Frank Li <Frank.Li@....com>
Subject: Re: [PATCH v3 3/3] ARM64: dts: add ngpios for vf610 compatible gpio
 controllers

Am 20.05.25 um 05:46 schrieb Haibo Chen:
> 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>
Reviewed-by: Stefan Wahren <wahrenst@....net>

Thanks