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exynos5: Don't potentially undervoltage the CPU

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For snow when chainloading u-boot the CPU seems to be running at full
speed. The lower CPU voltage seems to be ok for u-boot, but when booting
linux (bringing up all cores) I'm seeing random crashes.

Bump the voltage up to a level that's safe for all cpu frequencies.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Sjoerd Simons 2017-01-10 12:28:57 +01:00 • committed by Minkyu Kang
parent 9c796784aa
commit 701e740f59
1 changed files with 1 additions and 7 deletions
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8
board/samsung/common/exynos5-dt.c
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@ -123,13 +123,7 @@ int exynos_power_init(void)
if (ret)
return ret;
/*
* This would normally be 1.3V, but since we are running slowly 1.1V
* is enough. For spring it helps reduce CPU temperature and avoid
* hangs with the case open. 1.1V is minimum voltage borderline for
* chained bootloaders.
*/
ret = exynos_set_regulator("vdd_arm", 1100000);
ret = exynos_set_regulator("vdd_arm", 1300000);
if (ret)
return ret;
ret = exynos_set_regulator("vdd_int", 1012500);