From 214c719eed83967b8f0564feca65eebb3d83f5bc Mon Sep 17 00:00:00 2001 From: Aamir Bohra Date: Mon, 18 May 2020 12:17:45 +0530 Subject: mb/google/dedede: Add mainboard acpi support for GPIO PM configuration Setting the default values for GPIO community power management, causes issues in detecting TPM interrupts. So to avoid that GPIO PM has to be disabled in devicetree. But for S0ix it is needed. This patch implements a workaround in ASL code to enable GPIO PM on S0ix entry and disable it on S0ix exit. This patch adds the following three platform specific methods. 1. MS0X to enable power management features for GPIO communities on low power mode entry and disables it on exit. 2. MPTS to enable power management features for GPIO communities when preparing to sleep. 3. MWAK to disable power management features for GPIO communities on waking up. BUG=b:153847814 TEST=Verify S0ix is working. GPIO PM configuration is upadated on low power mode entry and exit. Change-Id: I7225b78ab2ac5bf17f93230cd85cd21e836d807d Signed-off-by: Aamir Bohra Reviewed-on: https://review.coreboot.org/c/coreboot/+/41502 Reviewed-by: Karthik Ramasubramanian Tested-by: build bot (Jenkins) --- src/mainboard/google/dedede/acpi/mainboard.asl | 49 ++++++++++++++++++++++++++ src/mainboard/google/dedede/dsdt.asl | 8 +++++ 2 files changed, 57 insertions(+) create mode 100644 src/mainboard/google/dedede/acpi/mainboard.asl (limited to 'src') diff --git a/src/mainboard/google/dedede/acpi/mainboard.asl b/src/mainboard/google/dedede/acpi/mainboard.asl new file mode 100644 index 0000000000..e7a8bf4ee5 --- /dev/null +++ b/src/mainboard/google/dedede/acpi/mainboard.asl @@ -0,0 +1,49 @@ +/* + * This file is part of the coreboot project. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include +#include + +Method (PGPM, 1, Serialized) +{ + For (Local0 = 0, Local0 < TOTAL_GPIO_COMM, Local0++) + { + \_SB.PCI0.CGPM (Local0, Arg0) + } +} + +/* + * Method called from _PTS prior to system sleep state entry + * Enables dynamic clock gating for all 5 GPIO communities + */ +Method (MPTS, 1, Serialized) +{ + PGPM (MISCCFG_ENABLE_GPIO_PM_CONFIG) +} + +/* + * Method called from _WAK prior to system sleep state wakeup + * Disables dynamic clock gating for all 5 GPIO communities + */ +Method (MWAK, 1, Serialized) +{ + PGPM (0) +} + +/* + * S0ix Entry/Exit Notifications + * Called from \_SB.LPID._DSM + */ +Method (MS0X, 1, Serialized) +{ + If (Arg0 == 1) { + /* S0ix Entry */ + PGPM (MISCCFG_ENABLE_GPIO_PM_CONFIG) + } Else { + /* S0ix Exit */ + PGPM (0) + } +} diff --git a/src/mainboard/google/dedede/dsdt.asl b/src/mainboard/google/dedede/dsdt.asl index dce0bf35f0..933ca1a503 100644 --- a/src/mainboard/google/dedede/dsdt.asl +++ b/src/mainboard/google/dedede/dsdt.asl @@ -27,6 +27,9 @@ DefinitionBlock( #include #include } + + /* Mainboard hooks */ + #include "acpi/mainboard.asl" } #if CONFIG(VARIANT_HAS_CAMERA_ACPI) @@ -34,6 +37,11 @@ DefinitionBlock( #include #endif + + /* Include Low power idle table for a short term workaround to enable + S0ix. Once cr50 pulse width is fixed, this can be removed. */ + #include + /* Chrome OS specific */ #include -- cgit v1.2.3