Change in coreboot[master]: ec/google/chromeec: OEM variables support for DPTF

[Sumeet R Pawnikar (Code Review)]

Attention is currently required from: Tim Wawrzynczak.
Sumeet R Pawnikar has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/54098 )

Change subject: ec/google/chromeec: OEM variables support for DPTF
......................................................................

ec/google/chromeec: OEM variables support for DPTF

This adds OEM variables support for DPTF to notify the change.

BRANCH=None
BUG=b:187253038
TEST=Built and tested on dedede board

Change-Id: I79fbf00521d54e66b6cd7d95b026a76fd3a4394b
Signed-off-by: Sumeet R Pawnikar 
---
M src/ec/google/chromeec/ec_dptf_helpers.c
1 file changed, 26 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/98/54098/1

diff --git a/src/ec/google/chromeec/ec_dptf_helpers.c b/src/ec/google/chromeec/ec_dptf_helpers.c
index 631f16e..805a12c 100644
--- a/src/ec/google/chromeec/ec_dptf_helpers.c
+++ b/src/ec/google/chromeec/ec_dptf_helpers.c
@@ -15,6 +15,7 @@
 enum {
    TRIP_POINTS_CHANGED_EVENT	= 0x81,
    THERMAL_EVENT			= 0x90,
+	ODVP_CHANGED_EVENT		= 0x88,
 };

/* EC constants */
@@ -124,6 +125,17 @@
    acpigen_pop_len(); /* Method _FSL */
 }

+static void write_ietm_odvp(const struct device *ec)
+{
+	acpigen_write_name("ODVP");
+	acpigen_write_package(6);
+	acpigen_write_integer(0);
+
+	/* Notify DPTF about ODVP change */
+	acpigen_notify("ODVP", ODVP_CHANGED_EVENT);
+	acpigen_pop_len();
+}
+
 /*
  * Emit code to execute if the policy is enabled after this function is called, and also
  * remember to manually add a acpigen_pop_len() afterwards!
@@ -283,6 +295,12 @@
    }

acpigen_pop_len(); /* Method */
+
+	/* ODVE */
+	acpigen_write_method_serialized("ODVE", 0);
+	acpigen_notify("ODVP", ODVP_CHANGED_EVENT);
+	acpigen_pop_len(); /* Method */
+
    acpigen_pop_len(); /* Scope */
 }

@@ -302,6 +320,13 @@
    acpigen_pop_len(); /* Scope */
 }

+static void write_ietm_methods(const struct device *ec)
+{
+	dptf_write_scope(DPTF_IETM);
+	write_ietm_odvp(ec);
+	acpigen_pop_len(); /* Scope */
+}
+
 static void write_thermal_methods(const struct device *ec, enum dptf_participant participant,
    			  int tsr_index)
 {
@@ -354,6 +379,7 @@
    write_dppm_methods(ec);
    write_charger_methods(ec);
    write_fan_methods(ec);
+	write_ietm_methods(ec);

for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_3; ++p, ++i)
    	write_thermal_methods(ec, p, i);