Kane Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/35596 )
Change subject: mb/google/hatch: Enable PchPmSlpS0Vm075VSupport for hatch ......................................................................
mb/google/hatch: Enable PchPmSlpS0Vm075VSupport for hatch
On hatch and variant HW designs supports VCCPRIM_CORE Low Voltage Mode. VCCPRIM_CORE can be down to 0.75v when slp_s0 is asserted.
This commit enables PchPmSlpS0Vm075VSupport UPD so that FSP can program related setttings to save power.
BUG=b:134092071 TEST=Run suspend_stress_test on kohaku and pass 100 cycles
Change-Id: Ia02ff8823883489b36349457213409496f082f36 Signed-off-by: Kane Chen kane.chen@intel.com --- M src/mainboard/google/hatch/variants/baseboard/devicetree.cb 1 file changed, 2 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/96/35596/1
diff --git a/src/mainboard/google/hatch/variants/baseboard/devicetree.cb b/src/mainboard/google/hatch/variants/baseboard/devicetree.cb index 7382209..a2831e1 100644 --- a/src/mainboard/google/hatch/variants/baseboard/devicetree.cb +++ b/src/mainboard/google/hatch/variants/baseboard/devicetree.cb @@ -58,6 +58,8 @@
register "PmTimerDisabled" = "1"
+ register "PchPmSlpS0Vm075VSupport" = "1" + # VR Settings Configuration for 4 Domains #+----------------+-------+-------+-------+-------+ #| Domain/Setting | SA | IA | GTUS | GTS |