[PATCH v2 6/7] riscv: dts: spacemit: k1-orangepi-rv2: add PMIC and power infrastructure

[Trevor Gamblin]

Hi,

On 2026-03-09 07:40, Iker Pedrosa wrote:
> Add Spacemit P1 PMIC configuration and board power infrastructure for
> voltage regulation support.
>
> - Add board power regulators (12V input, 4V rail)
> - Enable I2C8 for PMIC communication
> - Configure PMIC with buck4 (vmmc) and aldo1 (vqmmc) regulators
> - Set up regulator constraints for SD card operation
>
> Signed-off-by: Iker Pedrosa <ikerpedrosam at gmail.com>
> ---
>   arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 48 ++++++++++++++++++++++++
>   1 file changed, 48 insertions(+)
>
> diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> index 7b7331cb3c726f11d597f81917f3a3f5fc21e1b9..414b03f5e6480f05f5d7eeaaa0afb4e86425ae36 100644
> --- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> +++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
> @@ -19,6 +19,25 @@ aliases {
>   		ethernet1 = &eth1;
>   	};
>   
> +	reg_dc_in: dc-in-12v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "dc_in_12v";
> +		regulator-min-microvolt = <12000000>;
> +		regulator-max-microvolt = <12000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
Is this the correct voltage? I don't see a 12V rail in the RV2's 
datasheet, and the board's specifications only indicate a 5V USB-C input.
> +	reg_vcc_4v: vcc-4v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc_4v";
> +		regulator-min-microvolt = <4000000>;
> +		regulator-max-microvolt = <4000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +		vin-supply = <&reg_dc_in>;
> +	};
> +
>   	chosen {
>   		stdout-path = "serial0";
>   	};
> @@ -92,3 +111,32 @@ &uart0 {
>   	pinctrl-0 = <&uart0_2_cfg>;
>   	status = "okay";
>   };
> +
> +&i2c8 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c8_cfg>;
> +	status = "okay";
> +
> +	pmic at 41 {
> +		compatible = "spacemit,p1";
> +		reg = <0x41>;
> +		interrupts = <64>;
> +		vin-supply = <&reg_vcc_4v>;
> +
> +		regulators {
> +			sd_vmmc: buck4 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-ramp-delay = <5000>;
> +				regulator-always-on;
> +			};
> +
> +			sd_vqmmc: aldo1 {
> +				regulator-min-microvolt = <500000>;
> +				regulator-max-microvolt = <3400000>;
> +				regulator-boot-on;
> +				regulator-always-on;
> +			};
> +		};
> +	};
> +};
>