[PATCH v2] dts: riscv: spacemit: k3: add P1 PMIC regulator tree

[Yixun Lan]

Add the P1 PMIC's regulator topology tree for pico-itx board.

Signed-off-by: Yixun Lan <dlan at kernel.org>
---
This series try to add a regulator power tree from P1 PMIC,
the PMIC is controlled via an I2C interface.

To test this patch, it will need the I2C patch series [1]

Link: https://lore.kernel.org/all/20260325-02-k3-i2c-v1-0-78f29c83d9ac@kernel.org [1]
---
Changes in v2:
- drop regulator (dc 12v) which serves no devices
- drop regulators which current has no users
- Link to v1: https://lore.kernel.org/r/20260325-02-k3-i2c-v1-1-a793776b88bc@kernel.org
---
 arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 147 +++++++++++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi |  11 ++
 2 files changed, 158 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
index 504fe6bd46b2..4486dc1fe114 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
+++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts
@@ -25,6 +25,153 @@ memory at 100000000 {
 		device_type = "memory";
 		reg = <0x1 0x00000000 0x4 0x00000000>;
 	};
+
+	reg_aux_vcc5v: regulator-aux-vcc5v {
+		compatible = "regulator-fixed";
+		regulator-name = "AUX_VCC5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+};
+
+&i2c8 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c8_cfg>;
+	status = "okay";
+
+	p1 at 41 {
+		compatible = "spacemit,p1";
+		reg = <0x41>;
+		interrupts = <64 IRQ_TYPE_LEVEL_HIGH>;
+		vin1-supply = <&reg_aux_vcc5v>;
+		vin2-supply = <&reg_aux_vcc5v>;
+		vin3-supply = <&reg_aux_vcc5v>;
+		vin4-supply = <&reg_aux_vcc5v>;
+		vin5-supply = <&reg_aux_vcc5v>;
+		vin6-supply = <&reg_aux_vcc5v>;
+		aldoin-supply = <&reg_aux_vcc5v>;
+		dldoin1-supply = <&buck4>;
+		dldoin2-supply = <&buck4>;
+
+		regulators {
+			buck1: buck1 {
+				regulator-min-microvolt = <1050000>;
+				regulator-max-microvolt = <1050000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck2: buck2 {
+				regulator-min-microvolt = <1050000>;
+				regulator-max-microvolt = <1050000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck3: buck3 {
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <800000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck4: buck4 {
+				regulator-min-microvolt = <2100000>;
+				regulator-max-microvolt = <2100000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck5: buck5 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			buck6: buck6 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <500000>;
+				regulator-ramp-delay = <5000>;
+				regulator-always-on;
+			};
+
+			aldo1: aldo1 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			aldo2: aldo2 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			aldo3: aldo3 {
+				regulator-min-microvolt = <500000>;
+				regulator-max-microvolt = <3400000>;
+			};
+
+			aldo4: aldo4 {
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo1: dldo1 {
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo2: dldo2 {
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <900000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo3: dldo3 {
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo4: dldo4 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+			};
+
+			dldo5: dldo5 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo6: dldo6 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			dldo7: dldo7 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+		};
+	};
 };
 
 &eth0 {
diff --git a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
index a7b5d10c332e..23899d3f308a 100644
--- a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi
@@ -45,6 +45,17 @@ gmac0-phy-0-pins {
 		};
 	};
 
+	/omit-if-no-ref/
+	i2c8_cfg: i2c8-cfg {
+		i2c8-pins {
+			pinmux = <K3_PADCONF(128, 0)>,	/* i2c8 scl */
+				 <K3_PADCONF(129, 0)>;	/* i2c8 sda */
+
+			bias-pull-up = <0>;
+			drive-strength = <25>;
+		};
+	};
+
 	/omit-if-no-ref/
 	uart0_0_cfg: uart0-0-cfg {
 		uart0-0-pins {

---
base-commit: c9bc6f02e3252c20dd967811de7bf7739812259f
change-id: 20260311-02-k3-i2c-6ad52566a9a3
prerequisite-change-id: 20260311-02-k3-i2c-6ad52566a9a3:v1
prerequisite-patch-id: 9a6b8f6968935c8ed5c9acd8ecb778be2d1a3faa
prerequisite-patch-id: d43e077460cb3ea4e391fb7c528b6ffa80f35574

Best regards,
-- 
Yixun Lan <dlan at kernel.org>