Re: [PATCH v1 0/1] pinctrl/GPIO driver for Apple SoCs

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>]

On Tue, Sep 21, 2021 at 11:29:55PM +0100, Joey Gouly wrote:
> Hi all,
> 
> This is a driver for the combined pinctrl / GPIO hw in the Apple M1 computers.
> The driver is based on Corellium's driver [1], and has been rebased and cleaned up.
> The bindings are in Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml

Have you checked if there is any (qualcomm / samsung / ?) existing driver is
close enough to this hardware?

> This has been tested with out-of-tree patches for the keyboard on the Macbook
> Air, it has also been tested with i2c for the USB PD driver and PCIe (all
> out-of-tree drivers currently).
> 
> I left two defines at the top 'USE_PINMUX_GENERIC_FN' and
> 'USE_PINCTRL_GENERIC_FN', I wasn't sure if I should use the generic functions for
> getting the groups/functions, so I left both approaches in and will remove one
> of them for the next version! Which approach should I use?

Try to get rid of defines.

> There is a branch here with the driver:
>   https://gitlab.arm.com/linux-arm/jg-open/-/commits/pinctrl_apple_v1
> 
> There is also a branch which contains all the commits as I was
> developing here (and keyboard drivers):
>   https://gitlab.arm.com/linux-arm/jg-open/-/commits/m1-keyboard
> 
> I look forward to feedback!
> 
> Thanks,
> Joey
> 
> note: I'm sending this from my arm work e-mail address, however it was done on
> personal time.

It doesn't matter to the community. Check this with your employer.

> note2: For those that have been testing this with PCIe etc, you will probably
> want to also include the last commit in the following branch, as I dropped the
> clock references in the code (due to the switch to power domains):
> https://gitlab.arm.com/linux-arm/jg-open/-/commits/pinctrl_apple_v1_clock
> 
> [1]
> https://github.com/corellium/linux-m1/blob/d5ec2a737e64de23a21025f9eddc554588deb23f/drivers/pinctrl/pinctrl-apple-gpio.c

-- 
With Best Regards,
Andy Shevchenko