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authorTristan Shieh <tristan.shieh@mediatek.com>2019-04-29 09:12:54 +0800
committerPatrick Georgi <pgeorgi@google.com>2019-05-06 10:27:53 +0000
commitb75f493ed7fafb6a933a3f47e1e90803b18fcb65 (patch)
tree58d51428a6b4c1987fd98cae4596aaef264f8508 /src/soc
parent3fe7c44d501d64cfcc5cd79fbc02f7071bdfda4b (diff)
downloadcoreboot-b75f493ed7fafb6a933a3f47e1e90803b18fcb65.tar.xz
mediatek/mt8183: Wait 200us for voltages to settle
When we increase voltages, it takes 200us for voltages to stablize. BUG=b:80501386 BRANCH=none Test=Boots correctly on Kukui Change-Id: I5f32035693b6084dbe763411c612ae5d1f7c9e48 Signed-off-by: Tristan Shieh <tristan.shieh@mediatek.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32498 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: You-Cheng Syu <youcheng@google.com> Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/soc')
-rw-r--r--src/soc/mediatek/mt8183/mt6358.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8183/mt6358.c b/src/soc/mediatek/mt8183/mt6358.c
index 8162e3aaf1..705424337f 100644
--- a/src/soc/mediatek/mt8183/mt6358.c
+++ b/src/soc/mediatek/mt8183/mt6358.c
@@ -16,6 +16,7 @@
#include <console/console.h>
#include <soc/pmic_wrap.h>
#include <soc/mt6358.h>
+#include <timer.h>
static struct pmic_setting init_setting[] = {
/* [15:0]: TMA_KEY */
@@ -775,13 +776,18 @@ static void mt6358_lp_setting(void)
void mt6358_init(void)
{
+ struct stopwatch voltage_settled;
+
if (pwrap_init())
die("ERROR - Failed to initialize pmic wrap!");
pmic_set_power_hold(true);
pmic_wdt_set();
mt6358_init_setting();
+ stopwatch_init_usecs_expire(&voltage_settled, 200);
wk_sleep_voltage_by_ddr();
wk_power_down_seq();
mt6358_lp_setting();
+ while (!stopwatch_expired(&voltage_settled))
+ /* wait for voltages to settle */;
}