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Before reboot if the DCDC is disabled, the DCDC is still disabled after restart. We have an method to workaround: Use vsel pin to switch the voltage between value in FAN53555_VSEL0 and FAN53555_VSEL1. If VSEL pin is inactive, the voltage of DCDC are controlled by FAN53555_VSEL0, when we pull vsel pin to active, they would be controlled by FAN53555_VSEL1. In this case, we can set FAN53555_VSEL1 to disable dcdc, So we can make vsel pin to active to disable dcdc, VSEL pin is inactive to enable DCDC. Change-Id: I14c823ed11dc3369044ad2ed0b53a6027acbccd0 Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>