From d457f127731aa59b372abbf410d7bdef67d7d20d Mon Sep 17 00:00:00 2001
From: Derek Basehore <dbasehore@chromium.org>
Date: Wed, 21 Sep 2016 17:42:26 -0700
Subject: [PATCH] google/gru: change center logic voltage to 900mV

It seems that we should only ever run at 900mV on center logic.
Changing it to 950mV before might have just masked over problems that
are now fixed.

BRANCH=none
BUG=chrome-os-partner:56940
TEST=on kevin, run
stressapptest -M 1536 -s 1000

Change-Id: I5a09b1b403df800396bb2f2e8c76d14a4519d44a
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/388068
Commit-Ready: Caesar Wang <wxt@rock-chips.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Lin Huang <hl@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
---
 src/mainboard/google/gru/romstage.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/mainboard/google/gru/romstage.c b/src/mainboard/google/gru/romstage.c
index b0b004a16e..2e1fe4378d 100644
--- a/src/mainboard/google/gru/romstage.c
+++ b/src/mainboard/google/gru/romstage.c
@@ -22,6 +22,7 @@
 #include <cbmem.h>
 #include <gpio.h>
 #include <console/console.h>
+#include <delay.h>
 #include <program_loading.h>
 #include <romstage_handoff.h>
 #include <soc/addressmap.h>
@@ -38,7 +39,9 @@ static void init_dvs_outputs(void)
 {
 	pwm_regulator_configure(PWM_REGULATOR_GPU, 900);
 	pwm_regulator_configure(PWM_REGULATOR_BIG, 900);
-	pwm_regulator_configure(PWM_REGULATOR_CENTERLOG, 950);
+	pwm_regulator_configure(PWM_REGULATOR_CENTERLOG, 900);
+	/* Allow time for the regulators to settle */
+	udelay(500);
 }
 
 static void prepare_sdmmc(void)