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References: <20240228-mbly-gpio-v2-0-3ba757474006@bootlin.com> <20240228-mbly-gpio-v2-5-3ba757474006@bootlin.com>
In-Reply-To: <20240228-mbly-gpio-v2-5-3ba757474006@bootlin.com>
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 29 Feb 2024 10:22:12 +0100
Message-ID: <CACRpkdbfX=fOLgP+2b15up9Dt1=W4qFG0UrCCnOhkjUF5X+OLQ@mail.gmail.com>
Subject: Re: [PATCH v2 05/30] gpio: nomadik: fix offset bug in nmk_pmx_set()
To: =?UTF-8?B?VGjDqW8gTGVicnVu?= <theo.lebrun@bootlin.com>
Cc: Bartosz Golaszewski <brgl@bgdev.pl>, Rob Herring <robh+dt@kernel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, 
	Philipp Zabel <p.zabel@pengutronix.de>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>, 
	linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, 
	linux-mips@vger.kernel.org, Gregory CLEMENT <gregory.clement@bootlin.com>, 
	Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>, 
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Tawfik Bayouk <tawfik.bayouk@mobileye.com>
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On Wed, Feb 28, 2024 at 12:28=E2=80=AFPM Th=C3=A9o Lebrun <theo.lebrun@boot=
lin.com> wrote:

> Previously, the statement looked like:
>
>     slpm[x] &=3D ~BIT(g->grp.pins[i]);
>
> Where:
>  - slpm is a unsigned int pointer;
>  - g->grp.pins[i] is a pin number. It can grow to more than 32.
>
> The expected shift amount is a pin bank offset.
>
> This bug does not occur on every group or pin: the altsetting must be
> NMK_GPIO_ALT_C and the pin must be 32 or above. It might have occured.
> For example, in pinctrl-nomadik-db8500.c, pin group i2c3_c_2 has the
> right altsetting and pins 229 and 230.
>
> Fixes: dbfe8ca259e1 ("pinctrl/nomadik: implement pin multiplexing")
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> Signed-off-by: Th=C3=A9o Lebrun <theo.lebrun@bootlin.com>

Patch applied!

Since the bug is not affecting the deployed UX500 systems I have merged
it with the rest as non-urgent fix, but it can be backported as a standalon=
e
patch if the stable maintainers want it after the release of v6.9-rc1.

Yours,
Linus Walleij