diff options
| author | Maulik V Vaghela <maulik.v.vaghela@intel.com> | 2021-11-08 07:53:37 +0000 |
|---|---|---|
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2021-11-17 15:54:10 +0000 |
| commit | 85d9f470144b8a125b5e439de19138fd5d83c1d5 (patch) | |
| tree | f7ac1d12e301788b7395ddc19f25a3ed4d99b410 /src/soc/intel/alderlake | |
| parent | d16a085110d42e28d273e94f96b60ef39c4bb0c2 (diff) | |
Revert "soc/intel/adl: Drop SGPM, RGPM and EGPM methods"
This reverts commit 1399442289607acc5203fb12df64e9081b3c3aa4.
Reason for revert:
Some Cr50 chips with old firmware version (x.y.22) don't support
long pulse interrupt command, requiring dynamic GPIO PM to be disabled
to intercept short pulse interrupt.
Due to this coreboot needs to expose SGPM, RGPM and EGPM ACPI methods
to support power gating of GPIO communities from the kernel when dynamic
GPIO PM is disabled.
BUG=b:204832081
BRANCH=None
Test= S0ix works with dynamic PM disabled.
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Change-Id: I2b5b00878062f8a499641d7a47db54ed078cd6cf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Scott Chao <scott_chao@wistron.corp-partner.google.com>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Diffstat (limited to 'src/soc/intel/alderlake')
| -rw-r--r-- | src/soc/intel/alderlake/acpi/gpio.asl | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/acpi/gpio.asl b/src/soc/intel/alderlake/acpi/gpio.asl index 6a1ba0074e..376afaba1e 100644 --- a/src/soc/intel/alderlake/acpi/gpio.asl +++ b/src/soc/intel/alderlake/acpi/gpio.asl @@ -137,3 +137,44 @@ Method (GPID, 1, Serialized) Return (Local0) } + +/* GPIO Power Management bits */ +Name(GPMB, Package(TOTAL_GPIO_COMM) {0, 0, 0, 0, 0, 0}) + +/* + * Save GPIO Power Management bits + */ +Method (SGPM, 0, Serialized) +{ + For (Local0 = 0, Local0 < TOTAL_GPIO_COMM, Local0++) + { + Local1 = GPID (Local0) + GPMB[Local0] = PCRR (Local1, GPIO_MISCCFG) + } +} + +/* + * Restore GPIO Power Management bits + */ +Method (RGPM, 0, Serialized) +{ + For (Local0 = 0, Local0 < TOTAL_GPIO_COMM, Local0++) + { + CGPM (Local0, DerefOf(GPMB[Local0])) + } +} + +/* + * Save current setting of GPIO Power Management bits and + * enable all Power Management bits for all communities + */ +Method (EGPM, 0, Serialized) +{ + /* Save current setting and will restore it when resuming */ + SGPM () + /* Enable PM bits */ + For (Local0 = 0, Local0 < TOTAL_GPIO_COMM, Local0++) + { + CGPM (Local0, MISCCFG_GPIO_PM_CONFIG_BITS) + } +} |