soc: apple: Add driver for Apple PMGR misc controls

Browse source

Apple SoCs have PMGR blocks that control a bunch of power-related
features. Besides the existing device power state controls (which are
very uniform and handled by apple-pmgr-pwrstate), we also need to manage
more random registers such as SoC-wide fabric and memory controller
power states, which have a different interface.

Add a driver for these kitchen sink controls. Right now it implements
fabric and memory controller power state switching on system
standby/s2idle, which saves about 1W of power or so on t60xx platforms.

Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Sven Peter <sven@kernel.org>
Co-developed-by: Sasha Finkelstein <k@chaosmail.tech>
Signed-off-by: Sasha Finkelstein <k@chaosmail.tech>
Reviewed-by: Joshua Peisach <jpeisach@ubuntu.com>
Link: https://patch.msgid.link/20260705-pmgr-misc-v3-2-51b75fed6f73@chaosmail.tech
Signed-off-by: Sven Peter <sven@kernel.org>

...

This commit is contained in:

Hector Martin 2026-07-05 10:16:31 +02:00 • committed by Sven Peter

parent a49c2acde6

commit fef9350c31

3 changed files with 193 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

10

drivers/soc/apple/Kconfig

View file

2

drivers/soc/apple/Makefile

View file

181

drivers/soc/apple/apple-pmgr-misc.c

View file