mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-04-02 05:51:14 -04:00
Code Issues Packages Projects Releases Wiki Activity

soc: apple: rtkit: Add function to poweroff

Browse Source 
Add a function to put a co-processor into the lowest possible power
state from which recovery usually isn't possible without a full SoC
reset. This is required for the USB4/Thunderbolt co-processors which
can be restarted since the entire USB4 root complex can be completely
reset independently of the rest of the SoC.

Reviewed-by: Janne Grunau <j@jannau.net>
Link: https://patch.msgid.link/20260117-apple-rtkit-poweroff-v2-1-b882a180e44d@kernel.org
Signed-off-by: Sven Peter <sven@kernel.org>
This commit is contained in:
Sven Peter
2026-01-17 18:59:10 +01:00
parent 8f0b4cce44
commit ba99035bf1
2 changed files with 23 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/soc/apple/rtkit.c
View File

@@ -851,6 +851,22 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk)
}
EXPORT_SYMBOL_GPL(apple_rtkit_shutdown);
int apple_rtkit_poweroff(struct apple_rtkit *rtk)
{
int ret;
ret = apple_rtkit_set_ap_power_state(rtk, APPLE_RTKIT_PWR_STATE_OFF);
if (ret)
return ret;
ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_OFF);
if (ret)
return ret;
return apple_rtkit_reinit(rtk);
}
EXPORT_SYMBOL_GPL(apple_rtkit_poweroff);
int apple_rtkit_idle(struct apple_rtkit *rtk)
{
int ret;

7
include/linux/soc/apple/rtkit.h
View File

@@ -125,6 +125,13 @@ int apple_rtkit_wake(struct apple_rtkit *rtk);
*/
int apple_rtkit_shutdown(struct apple_rtkit *rtk);
/*
* Put the co-processor into the lowest power state. Note that it usually
* is not possible to recover from this state without a full SoC reset.
*/
int apple_rtkit_poweroff(struct apple_rtkit *rtk);
/*
* Put the co-processor into idle mode
*/