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mediatek/mt8183: Wait 200us for voltages to settle

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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>
This commit is contained in:
Tristan Shieh
2019-04-29 09:12:54 +08:00
committed by Patrick Georgi
parent 3fe7c44d50
commit b75f493ed7
1 changed files with 6 additions and 0 deletions
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6
src/soc/mediatek/mt8183/mt6358.c
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@ -16,6 +16,7 @@
#include <console/console.h> #include <console/console.h>
#include <soc/pmic_wrap.h> #include <soc/pmic_wrap.h>
#include <soc/mt6358.h> #include <soc/mt6358.h>
#include <timer.h>
static struct pmic_setting init_setting[] = { static struct pmic_setting init_setting[] = {
/* [15:0]: TMA_KEY */ /* [15:0]: TMA_KEY */
@ -775,13 +776,18 @@ static void mt6358_lp_setting(void)
void mt6358_init(void) void mt6358_init(void)
{ {
struct stopwatch voltage_settled;
if (pwrap_init()) if (pwrap_init())
die("ERROR - Failed to initialize pmic wrap!"); die("ERROR - Failed to initialize pmic wrap!");
pmic_set_power_hold(true); pmic_set_power_hold(true);
pmic_wdt_set(); pmic_wdt_set();
mt6358_init_setting(); mt6358_init_setting();
stopwatch_init_usecs_expire(&voltage_settled, 200);
wk_sleep_voltage_by_ddr(); wk_sleep_voltage_by_ddr();
wk_power_down_seq(); wk_power_down_seq();
mt6358_lp_setting(); mt6358_lp_setting();
while (!stopwatch_expired(&voltage_settled))
/* wait for voltages to settle */;
} }