[PATCH v7 06/10] gpio: Add new gpio-macsmc driver for Apple Macs

[Sven Peter]

Hi Linus, Bartosz,

top posting on purpose: are you fine if Lee takes this commit with the 
rest through his mfd tree?


Thanks,


Sven



On 10.06.25 17:29, Sven Peter wrote:
> From: Hector Martin <marcan at marcan.st>
> 
> This driver implements the GPIO service on top of the SMC framework
> on Apple Mac machines. In particular, these are the GPIOs present in the
> PMU IC which are used to control power to certain on-board devices.
> 
> Although the underlying hardware supports various pin config settings
> (input/output, open drain, etc.), this driver does not implement that
> functionality and leaves it up to the firmware to configure things
> properly. We also don't yet support interrupts/events. This is
> sufficient for device power control, which is the only thing we need to
> support at this point. More features will be implemented when needed.
> 
> To our knowledge, only Apple Silicon Macs implement this SMC feature.
> 
> Signed-off-by: Hector Martin <marcan at marcan.st>
> Reviewed-by: Bartosz Golaszewski <brgl at bgdev.pl>
> Reviewed-by: Linus Walleij <linus.walleij at linaro.org>
> Reviewed-by: Sven Peter <sven at kernel.org>
> Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
> Reviewed-by: Alyssa Rosenzweig <alyssa at rosenzweig.io>
> Reviewed-by: Neal Gompa <neal at gompa.dev>
> Signed-off-by: Sven Peter <sven at kernel.org>
> ---
>   MAINTAINERS                |   1 +
>   drivers/gpio/Kconfig       |  10 ++
>   drivers/gpio/Makefile      |   1 +
>   drivers/gpio/gpio-macsmc.c | 292 +++++++++++++++++++++++++++++++++++++++++++++
>   4 files changed, 304 insertions(+)

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