diff options
| author | Hector Martin <marcan@marcan.st> | 2023-01-23 09:53:54 +0300 |
|---|---|---|
| committer | Hector Martin <marcan@marcan.st> | 2023-01-31 14:35:47 +0300 |
| commit | 40eaa8c0cbba4a27668c7e01373ccd5b38381e2f (patch) | |
| tree | 6b5e45accf7ea9a10aec514e574b790c8bca54bf /drivers/soc | |
| parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
| download | linux-40eaa8c0cbba4a27668c7e01373ccd5b38381e2f.tar.xz | |
soc: apple: rtkit: Add apple_rtkit_idle() function
This is yet another low power mode, used by DCP.
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/apple/rtkit.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/soc/apple/rtkit.c b/drivers/soc/apple/rtkit.c index 8ec74d7539eb..efb1fa77dff2 100644 --- a/drivers/soc/apple/rtkit.c +++ b/drivers/soc/apple/rtkit.c @@ -9,6 +9,7 @@ enum { APPLE_RTKIT_PWR_STATE_OFF = 0x00, /* power off, cannot be restarted */ APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, /* sleeping, can be restarted */ + APPLE_RTKIT_PWR_STATE_IDLE = 0x201, /* sleeping, retain state */ APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, /* running but no communication */ APPLE_RTKIT_PWR_STATE_ON = 0x20, /* normal operating state */ }; @@ -881,6 +882,26 @@ int apple_rtkit_shutdown(struct apple_rtkit *rtk) } EXPORT_SYMBOL_GPL(apple_rtkit_shutdown); +int apple_rtkit_idle(struct apple_rtkit *rtk) +{ + int ret; + + /* if OFF is used here the co-processor will not wake up again */ + ret = apple_rtkit_set_ap_power_state(rtk, + APPLE_RTKIT_PWR_STATE_IDLE); + if (ret) + return ret; + + ret = apple_rtkit_set_iop_power_state(rtk, APPLE_RTKIT_PWR_STATE_IDLE); + if (ret) + return ret; + + rtk->iop_power_state = APPLE_RTKIT_PWR_STATE_IDLE; + rtk->ap_power_state = APPLE_RTKIT_PWR_STATE_IDLE; + return 0; +} +EXPORT_SYMBOL_GPL(apple_rtkit_idle); + int apple_rtkit_quiesce(struct apple_rtkit *rtk) { int ret; |