diff options
| author | Vaibhav Shankar <vaibhav.shankar@intel.com> | 2017-11-16 17:46:48 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-11-23 05:03:14 +0000 |
| commit | 6fd5a79d476b54f1670d0a06227b446ab003b2a1 (patch) | |
| tree | 3a5856e3f987efc081dc8a8d2d485134c189d5fd /src/soc | |
| parent | d18db73d4997b08606d5186eee58f38c400281b6 (diff) | |
| download | coreboot-6fd5a79d476b54f1670d0a06227b446ab003b2a1.tar.xz | |
soc/intel/cannonlake: Add PM methods to power gate SD card controller
When system enters S0ix, system fails to power gate SD card
controller.
This patch implements PM methods to put the SD card controller
in D3 during S0ix entry.
TEST=Suspend and resume using 'echo freeze > /sys/power/state'.
The System should not be blocked by sd card controller.
Change-Id: I9a9fe14fb6cd3b76ee95c565b3359cdae1a3c445
Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Reviewed-on: https://review.coreboot.org/22487
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/cannonlake/acpi/scs.asl | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/acpi/scs.asl b/src/soc/intel/cannonlake/acpi/scs.asl index ed695fd580..e993ddbbf9 100644 --- a/src/soc/intel/cannonlake/acpi/scs.asl +++ b/src/soc/intel/cannonlake/acpi/scs.asl @@ -40,5 +40,22 @@ Scope (\_SB.PCI0) { { Name (_ADR, 0x00140005) + OperationRegion (SDPC, PCI_Config, 0x00, 0x100) + Field (SDPC, WordAcc, NoLock, Preserve) + { + Offset(0xA2), /* Device Power Gate config */ + , 2, + PGEN, 1 /* PGE - PG Enable */ + } + + Method (_PS0, 0, Serialized) + { + Store (0, PGEN) /* Disable PG */ + } + + Method (_PS3, 0, Serialized) + { + Store (1, PGEN) /* Enable PG */ + } } /* Device (SDXC) */ } |