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 <sjoerd.simons@collabora.co.uk>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/board/samsung/common/exynos5-dt.c b/board/samsung/common/exynos5-dt.c
index 2e3b16d..aec1f39 100644 (file)
--- 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);