Hi Andy, Am Donnerstag, 14. Januar 2016, 20:35:56 schrieb Andy Yan: > Rayeager board use pwm3 modulate the vdd_logic voltage, so enable it. > > Signed-off-by: Andy Yan <andy.yan at rock-chips.com> > --- > > arch/arm/boot/dts/rk3066a-rayeager.dts | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/arch/arm/boot/dts/rk3066a-rayeager.dts > b/arch/arm/boot/dts/rk3066a-rayeager.dts index 3d4c104..d17a5b8 100644 > --- a/arch/arm/boot/dts/rk3066a-rayeager.dts > +++ b/arch/arm/boot/dts/rk3066a-rayeager.dts > @@ -78,6 +78,18 @@ > }; > }; > > + pwm_regulator: pwm-regulator { > + compatible = "pwm-regulator"; > + pwms = <&pwm3 0 1000>; > + regulator-name = "vdd_logic"; > + regulator-min-microvolt = <1200000>; > + regulator-max-microvolt = <1200000>; I guess this is to make sure it stays at 1.2V at all times, or is the min- microvolt settings supposed to be lower? Thanks Heiko