This basically abandons my earlier attempts and goes back to Takahiro
Akashi's driver.  Here is the link to Takahiro's patchset:

https://lore.kernel.org/all/20231005025843.508689-1-takahiro.akashi@linaro.org/

v6: Fix a build error when CONFIG_PINCONF is disabled
    Fix the dt-binding subject and my email address
    Use pinconf_to_config_packed() instead of PIN_CONF_PACKED()

v5: Addresses Andy's cleanups to the driver.
    Adrresses Krzysztof's comments about the dt spec file.
    And almost all the subsystem prefixes were wrong.

v4: Addressed Andy's comments about kernel-doc
    Addressed Rob's comments on the spec file

v3: Forward ported Takahiro's patches and added some fixes ups to make
    it work on current kernels.

AKASHI Takahiro (3):
  pinctrl: introduce pinctrl_gpio_get_config()
  gpio: dt-bindings: Add GPIO on top of generic pin control
  gpio: gpio-by-pinctrl: add pinctrl based generic GPIO driver

Dan Carpenter (4):
  pinctrl: scmi: Add SCMI_PIN_INPUT_VALUE
  pinctrl: scmi: Delete PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS support
  pinctrl: scmi: ignore PIN_CONFIG_PERSIST_STATE
  firmware: arm_scmi: Allow PINCTRL_REQUEST to return EOPNOTSUPP

 .../bindings/gpio/pin-control-gpio.yaml       |  59 ++++++++++
 drivers/firmware/arm_scmi/pinctrl.c           |   2 +
 drivers/gpio/Kconfig                          |  13 +++
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-by-pinctrl.c                | 101 ++++++++++++++++++
 drivers/pinctrl/core.c                        |  31 ++++++
 drivers/pinctrl/pinconf.h                     |   6 ++
 drivers/pinctrl/pinctrl-scmi.c                |  46 +++++---
 include/linux/pinctrl/consumer.h              |   9 ++
 9 files changed, 255 insertions(+), 13 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/gpio/pin-control-gpio.yaml
 create mode 100644 drivers/gpio/gpio-by-pinctrl.c

-- 
2.53.0

On Mon, Mar 23, 2026 at 8:01 PM Dan Carpenter <dan.carpenter@linaro.org> wrote:

> This basically abandons my earlier attempts and goes back to Takahiro
> Akashi's driver.  Here is the link to Takahiro's patchset:
>
> https://lore.kernel.org/all/20231005025843.508689-1-takahiro.akashi@linaro.org/
>
> v6: Fix a build error when CONFIG_PINCONF is disabled
>     Fix the dt-binding subject and my email address
>     Use pinconf_to_config_packed() instead of PIN_CONF_PACKED()

v6 applied to this immutable branch:
https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git/log/?h=ib-scmi-pinctrl-gpio

Then merged into my devel branch for next.

Bartosz, you might want to pull it in!

Dan: thanks for your efforts to fix up the remaining hurdles and
bringing this to completion! Sometimes the last few % of work are
the hardest.

Also thanks to Takahiro for this idea: it worked out just like you
imagined.

Yours,
Linus Walleij

On Tue, Mar 24, 2026 at 2:11 PM Linus Walleij <linusw@kernel.org> wrote:
>
> On Mon, Mar 23, 2026 at 8:01 PM Dan Carpenter <dan.carpenter@linaro.org> wrote:
>
> > This basically abandons my earlier attempts and goes back to Takahiro
> > Akashi's driver.  Here is the link to Takahiro's patchset:
> >
> > https://lore.kernel.org/all/20231005025843.508689-1-takahiro.akashi@linaro.org/
> >
> > v6: Fix a build error when CONFIG_PINCONF is disabled
> >     Fix the dt-binding subject and my email address
> >     Use pinconf_to_config_packed() instead of PIN_CONF_PACKED()
>
> v6 applied to this immutable branch:
> https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git/log/?h=ib-scmi-pinctrl-gpio
>
> Then merged into my devel branch for next.
>
> Bartosz, you might want to pull it in!
>
> Dan: thanks for your efforts to fix up the remaining hurdles and
> bringing this to completion! Sometimes the last few % of work are
> the hardest.
>
> Also thanks to Takahiro for this idea: it worked out just like you
> imagined.
>

Pulled, thanks!

Bart