The Nanopi Neo 2 uses a fixed regulator to supply the CPU cores. The feedback resistor network can be changed by toggling a GPIO line. This is effectively a GPIO controlled regulator that can change between 1.1V and 1.3V.
Cc: Icenowy Zheng <[email protected]> Signed-off-by: Chen-Yu Tsai <[email protected]> --- This patch is based on the schematics and has not been tested on an actual board. --- .../dts/allwinner/sun50i-h5-nanopi-neo2.dts | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts index cc268a69786c..08ffdfb78137 100644 --- a/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts +++ b/arch/arm64/boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts @@ -99,6 +99,26 @@ gpio = <&r_pio 0 2 GPIO_ACTIVE_HIGH>; /* PL2 */ status = "okay"; }; + + reg_vdd_cpux: vdd-cpux { + compatible = "regulator-gpio"; + regulator-name = "vdd-cpux"; + regulator-type = "voltage"; + regulator-boot-on; + regulator-always-on; + regulator-min-microvolt = <1100000>; + regulator-max-microvolt = <1300000>; + regulator-ramp-delay = <50>; /* 4ms */ + enable-gpios = <&r_pio 0 8 GPIO_ACTIVE_HIGH>; /* PL8 */ + gpios = <&r_pio 0 1 GPIO_ACTIVE_HIGH>; /* PL6 */ + gpios-states = <0x1>; + states = <1100000 0x0 + 1300000 0x1>; + }; +}; + +&cpu0 { + cpu-supply = <®_vdd_cpux>; }; &ehci0 { -- 2.20.1
