[PATCH v7 06/10] gpio: Add new gpio-macsmc driver for Apple Macs
Sven Peter
sven at kernel.org
Sat Jul 19 05:59:41 PDT 2025
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(+)
[...]
More information about the linux-arm-kernel
mailing list