diff options
| author | Jeremy Compostella <jeremy.compostella@intel.com> | 2023-05-19 10:04:47 -0700 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-05-25 21:19:53 +0000 |
| commit | 246b943056a9c91bd6eac9412d460122c34c6b4a (patch) | |
| tree | 98c2d659f09271971d43d82797b64fc26459363d /src | |
| parent | aec951eb3af961953f9e8152fd05f32e11b11f36 (diff) | |
soc/intel/mtl/acpi/xhci: Add clock gating support
Implement PS0 and PS3 methods to support xHCI clock gating in S0ix
suspend and resume.
BUG=b:283989367
TEST=S0iX test passed
Change-Id: Ia5b72b81fd1c0d0b7b90f8d9cbf6ef4aa9da9743
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75401
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sukumar Ghorai <sukumar.ghorai@intel.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/meteorlake/acpi/xhci.asl | 6 | ||||
| -rw-r--r-- | src/soc/intel/meteorlake/include/soc/pcr_ids.h | 1 |
2 files changed, 5 insertions, 2 deletions
diff --git a/src/soc/intel/meteorlake/acpi/xhci.asl b/src/soc/intel/meteorlake/acpi/xhci.asl index a2ddebd9ed..38850508cb 100644 --- a/src/soc/intel/meteorlake/acpi/xhci.asl +++ b/src/soc/intel/meteorlake/acpi/xhci.asl @@ -16,12 +16,14 @@ Device (XHCI) Method (_PS0, 0, Serialized) { - + /* Disable Clock Gating */ + ^^PCRA (PID_XHCI, 0x0, ~(1 << 3)) } Method (_PS3, 0, Serialized) { - + /* Enable Clock Gating */ + ^^PCRO (PID_XHCI, 0x0, 1 << 3) } /* Root Hub for Meteorlake */ diff --git a/src/soc/intel/meteorlake/include/soc/pcr_ids.h b/src/soc/intel/meteorlake/include/soc/pcr_ids.h index 0ef9f30f8d..1b0eda3a5d 100644 --- a/src/soc/intel/meteorlake/include/soc/pcr_ids.h +++ b/src/soc/intel/meteorlake/include/soc/pcr_ids.h @@ -28,5 +28,6 @@ #define PID_ISCLK 0x64 #define PID_DMI 0x88 #define PID_IOM 0xAA +#define PID_XHCI 0x3A #endif |