diff options
author | Vaibhav Shankar <vaibhav.shankar@intel.com> | 2016-08-23 17:56:17 -0700 |
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committer | Aaron Durbin <adurbin@chromium.org> | 2016-09-14 22:17:47 +0200 |
commit | ef8deaffcbfb68c5b15cdc9c91607fce5734ec8b (patch) | |
tree | f595da26856df4dc4214837f339dae53ec481d20 /src/soc/intel/apollolake/acpi/gpiolib.asl | |
parent | 9e81540b85c6d06c7c3c63447b92f09590f032d1 (diff) |
soc/intel/apollolake: Add PM methods to power gate PCIe
This implements GNVS variable to store the address of PERST_0,
_ON/_OFF methods to power gate PCIe during S0ix entry, and
PERST_0 assertion/de-assertion methods.
BUG=chrome-os-partner:55877
TEST=Suspend and resume using 'echo freeze > /sys/power/state'.
System should resume with PCIE and wifi functional.
Change-Id: I9f63ca0b8a6565b6d21deaa6d3dfa34678714c19
Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Reviewed-on: https://review.coreboot.org/16351
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/soc/intel/apollolake/acpi/gpiolib.asl')
-rw-r--r-- | src/soc/intel/apollolake/acpi/gpiolib.asl | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/acpi/gpiolib.asl b/src/soc/intel/apollolake/acpi/gpiolib.asl new file mode 100644 index 0000000000..cec6d36722 --- /dev/null +++ b/src/soc/intel/apollolake/acpi/gpiolib.asl @@ -0,0 +1,67 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2016 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +Scope (\_SB) +{ + /* Get Pad Configuration DW0 register value */ + Method (GPC0, 0x1, Serialized) + { + /* Arg0 - GPIO DW0 address */ + Store (Arg0, Local0) + OperationRegion (PDW0, SystemMemory, Local0, 4) + Field (PDW0, AnyAcc, NoLock, Preserve) { + TEMP, 32 + } + Return (TEMP) + } + + /* Set Pad Configuration DW0 register value */ + Method (SPC0, 0x2, Serialized) + { + /* Arg0 - GPIO DW0 address */ + /* Arg1 - Value for DW0 register */ + Store (Arg0, Local0) + OperationRegion (PDW0, SystemMemory, Local0, 4) + Field (PDW0, AnyAcc, NoLock, Preserve) { + TEMP,32 + } + Store (Arg1, TEMP) + } + + /* Get Pad Configuration DW1 register value */ + Method (GPC1, 0x1, Serialized) + { + /* Arg0 - GPIO DW0 address */ + Store (Add (Arg0, 0x4), Local0) + OperationRegion (PDW1, SystemMemory, Local0, 4) + Field (PDW1, AnyAcc, NoLock, Preserve) { + TEMP, 32 + } + Return (TEMP) + } + + /* Set Pad Configuration DW1 register value */ + Method (SPC1, 0x2, Serialized) + { + /* Arg0 - GPIO DW0 address */ + /* Arg1 - Value for DW1 register */ + Store (Add (Arg0, 0x4), Local0) + OperationRegion (PDW1, SystemMemory, Local0, 4) + Field(PDW1, AnyAcc, NoLock, Preserve) { + TEMP,32 + } + Store (Arg1, TEMP) + } +} |