[coreboot-gerrit] Change in coreboot[master]: mb/google/drallion: Enable/disable GPIO clock gating

[John Su (Code Review)]

John Su has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/37665 )

Change subject: mb/google/drallion: Enable/disable GPIO clock gating
......................................................................

mb/google/drallion: Enable/disable GPIO clock gating

Follow CB:34180. Before the system enters S0ix, each GPIO community
will have its dynamic clock gating turned on. Upon return
to S0, the dynamic clock gating will be turned back off.

BUG=b:144002424
BRANCH=none

Change-Id: Iff121dfb0cd3d37a1da6ca31e1aff06ac33e037a
Signed-off-by: John Su 
---
M src/mainboard/google/drallion/variants/drallion/include/variant/acpi/mainboard.asl
1 file changed, 13 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/65/37665/1

diff --git a/src/mainboard/google/drallion/variants/drallion/include/variant/acpi/mainboard.asl b/src/mainboard/google/drallion/variants/drallion/include/variant/acpi/mainboard.asl
index dbe487e..608e4e0 100644
--- a/src/mainboard/google/drallion/variants/drallion/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/drallion/variants/drallion/include/variant/acpi/mainboard.asl
@@ -16,6 +16,15 @@
 #define CAM_EN GPP_B11 /* Active low */
 #define TS_PD GPP_E7
 #define HDMI_PD GPP_E16
+#include <intelblocks/gpio.h>
+
+Method (LOCL, 1, Serialized)
+{
+	For (Local0 = 0, Local0 < 5, Local0++)
+	{
+		_SB.PCI0.CGPM (Local0, Arg0)
+	}
+}

/* Method called from LPIT prior to enter s0ix state */
 Method (MS0X, 1)
@@ -25,11 +34,13 @@
    	_SB.PCI0.STXS (CAM_EN)
    	/* Turn off HDMI power */
    	_SB.PCI0.CTXS (HDMI_PD)
+		LOCL (MISCCFG_ENABLE_GPIO_PM_CONFIG)
    } Else {
    	/* Turn on camera power */
    	_SB.PCI0.CTXS (CAM_EN)
    	/* Turn on HDMI power */
    	_SB.PCI0.STXS (HDMI_PD)
+		LOCL (0)
    }
 }

@@ -42,10 +53,12 @@
    _SB.PCI0.CTXS (TS_PD)
    /* Clear HDMI power to avoid leakage */
    _SB.PCI0.CTXS (HDMI_PD)
+	LOCL (MISCCFG_ENABLE_GPIO_PM_CONFIG)
 }

/* Method called from _WAK prior to wakeup */
 Method (MWAK, 1)
 {
    _SB.PCI0.LPCB.EC0.WAK (Arg0)
+	LOCL (0)
 }