linux-kernel - Re: [PATCH 0/3] gpio: idio-16: Fix regmap initialization errors

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Message-ID: <CAMRc=Md0iMkYtLZseccidLvhacsRRM4CXhL48Y1O2Ri-ZTeK9g@mail.gmail.com>
Date: Fri, 17 Oct 2025 10:26:55 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: William Breathitt Gray <wbg@...nel.org>
Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
	Linus Walleij <linus.walleij@...aro.org>, Michael Walle <mwalle@...nel.org>, 
	Ioana Ciornei <ioana.ciornei@....com>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
	Mark Brown <broonie@...nel.org>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Mark Cave-Ayland <mark.caveayland@...anix.com>, 
	stable@...r.kernel.org
Subject: Re: [PATCH 0/3] gpio: idio-16: Fix regmap initialization errors

On Fri, Oct 17, 2025 at 2:58 AM William Breathitt Gray <wbg@...nel.org> wrote:
>
> The migration of IDIO-16 GPIO drivers to the regmap API resulted in some
> regressions to the gpio-104-idio-16, gpio-pci-idio-16, and gpio-idio-16
> modules. Specifically, the 104-idio-16 and pci-idio-16 GPIO drivers
> utilize regmap caching and thus must set max_register for their
> regmap_config, while gpio-idio-16 requires fixed_direction_output to
> represent the fixed direction of the IDIO-16 GPIO lines. Fixes for these
> regressions are provided by this series.
>
> Link: https://lore.kernel.org/r/cover.1680618405.git.william.gray@linaro.org
> Link: https://lore.kernel.org/r/9b0375fd-235f-4ee1-a7fa-daca296ef6bf@nutanix.com
> Signed-off-by: William Breathitt Gray <wbg@...nel.org>
> ---
> William Breathitt Gray (3):
>       gpio: 104-idio-16: Define maximum valid register address offset
>       gpio: pci-idio-16: Define maximum valid register address offset
>       gpio: idio-16: Define fixed direction of the GPIO lines
>
>  drivers/gpio/gpio-104-idio-16.c | 1 +
>  drivers/gpio/gpio-idio-16.c     | 5 +++++
>  drivers/gpio/gpio-pci-idio-16.c | 1 +
>  3 files changed, 7 insertions(+)
> ---
> base-commit: eba11116f39533d2e38cc5898014f2c95f32d23a
> change-id: 20251017-fix-gpio-idio-16-regmap-1282cdc56a19
>
> Best regards,
> --
> William Breathitt Gray <wbg@...nel.org>
>
>

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Bartosz