diff options
| author | Sven Peter <sven@kernel.org> | 2025-06-10 15:29:46 +0000 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2025-07-24 09:47:33 +0100 |
| commit | e038d985c9823a12cd64fa077d0c5aca2c644b67 (patch) | |
| tree | 73003796f85251e21ada05bc0df207b1628a1662 /drivers/mfd/Kconfig | |
| parent | ba9ae011e8373b1ff34aa4175c79288013de7fc8 (diff) | |
mfd: Add Apple Silicon System Management Controller
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@marcan.st>
Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sven Peter <sven@kernel.org>
Link: https://lore.kernel.org/r/20250610-smc-6-15-v7-5-556cafd771d3@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/mfd/Kconfig')
| -rw-r--r-- | drivers/mfd/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6fb3768e3d71..c6cc42360887 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -285,6 +285,24 @@ config MFD_CS42L43_SDW Select this to support the Cirrus Logic CS42L43 PC CODEC with headphone and class D speaker drivers over SoundWire. +config MFD_MACSMC + tristate "Apple Silicon System Management Controller (SMC)" + depends on ARCH_APPLE || COMPILE_TEST + depends on OF + depends on APPLE_RTKIT + select MFD_CORE + help + 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. + config MFD_MADERA tristate "Cirrus Logic Madera codecs" select MFD_CORE |