From 701e740f59bb1108485f1cb8e1b54248eee3ff87 Mon Sep 17 00:00:00 2001 From: Sjoerd Simons Date: Tue, 10 Jan 2017 12:28:57 +0100 Subject: exynos5: Don't potentially undervoltage the CPU 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 Reviewed-by: Javier Martinez Canillas Signed-off-by: Minkyu Kang diff --git a/board/samsung/common/exynos5-dt.c b/board/samsung/common/exynos5-dt.c index 2e3b16d..aec1f39 100644 --- a/board/samsung/common/exynos5-dt.c +++ b/board/samsung/common/exynos5-dt.c @@ -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); -- cgit v0.10.2