The min/max value of vdd_log is decide by pwm IO voltage and its resistors, the rk3399-firefly board's pwm regulator circuit is designed for IO voltage at 1.8V, while the board actually use 3.0V for IO, which at last lead to the min-microvolt to '430mV' instead of '800mV'. Signed-off-by: Kever Yang <kever.yang@xxxxxxxxxxxxxx> --- arch/arm64/boot/dts/rockchip/rk3399-firefly.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts index c706db0ee9ec..92de83dd4dbc 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-firefly.dts @@ -206,7 +206,7 @@ regulator-name = "vdd_log"; regulator-always-on; regulator-boot-on; - regulator-min-microvolt = <800000>; + regulator-min-microvolt = <430000>; regulator-max-microvolt = <1400000>; vin-supply = <&vcc_sys>; }; -- 2.17.1
