linux-kernel - Re: [PATCH] pinctrl: rockchip: correct RK3328 iomux width flag for GPIO2-B pins

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Message-ID: <CACRpkdaekcM-rGNzczQFFwDcte8cR2D=j6LB9h5W1XRbBtBhJg@mail.gmail.com>
Date: Sat, 24 Aug 2024 16:40:18 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Huang-Huang Bao <i@....me>
Cc: Heiko Stuebner <heiko@...ech.de>, Richard Kojedzinszky <richard@...edz.in>, linux-gpio@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] pinctrl: rockchip: correct RK3328 iomux width flag for
 GPIO2-B pins

On Tue, Jul 9, 2024 at 12:55 PM Huang-Huang Bao <i@....me> wrote:

> The base iomux offsets for each GPIO pin line are accumulatively
> calculated based off iomux width flag in rockchip_pinctrl_get_soc_data.
> If the iomux width flag is one of IOMUX_WIDTH_4BIT, IOMUX_WIDTH_3BIT or
> IOMUX_WIDTH_2BIT, the base offset for next pin line would increase by 8
> bytes, otherwise it would increase by 4 bytes.
>
> Despite most of GPIO2-B iomux have 2-bit data width, which can be fit
> into 4 bytes space with write mask, it actually take 8 bytes width for
> whole GPIO2-B line.
>
> Commit e8448a6c817c ("pinctrl: rockchip: fix pinmux bits for RK3328
> GPIO2-B pins") wrongly set iomux width flag to 0, causing all base
> iomux offset for line after GPIO2-B to be calculated wrong. Fix the
> iomux width flag to IOMUX_WIDTH_2BIT so the offset after GPIO2-B is
> correctly increased by 8, matching the actual width of GPIO2-B iomux.
>
> Fixes: e8448a6c817c ("pinctrl: rockchip: fix pinmux bits for RK3328 GPIO2-B pins")
> Cc: stable@...r.kernel.org
> Reported-by: Richard Kojedzinszky <richard@...edz.in>
> Closes: https://lore.kernel.org/linux-rockchip/4f29b743202397d60edfb3c725537415@kojedz.in/
> Tested-by: Richard Kojedzinszky <richard@...edz.in>
> Signed-off-by: Huang-Huang Bao <i@....me>

Patch applied for fixes!

Yours,
Linus Walleij