[PATCH v7 05/10] mfd: Add Apple Silicon System Management Controller

[Lee Jones]

On Tue, 10 Jun 2025, Sven Peter wrote:

> The System Management Controller (SMC) on Apple Silicon machines is a
> piece of hardware that exposes various functionalities such as
> temperature sensors, voltage/power meters, shutdown/reboot handling,
> GPIOs and more.
> 
> Communication happens via a shared mailbox using the RTKit protocol
> which is also used for other co-processors. The SMC protocol then allows
> reading and writing many different keys which implement the various
> features. The MFD core device handles this protocol and exposes it
> to the sub-devices.
> 
> Some of the sub-devices are potentially also useful on pre-M1 Apple
> machines and support for SMCs on these machines can be added at a later
> time.
> 
> Co-developed-by: Hector Martin <marcan at marcan.st>
> Signed-off-by: Hector Martin <marcan at marcan.st>
> 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                |   2 +
>  drivers/mfd/Kconfig        |  18 ++
>  drivers/mfd/Makefile       |   1 +
>  drivers/mfd/macsmc.c       | 498 +++++++++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/macsmc.h | 279 +++++++++++++++++++++++++
>  5 files changed, 798 insertions(+)

This is ready.  Let me know when you have all of the other driver/* Acks.

-- 
Lee Jones [李琼斯]