[PATCH v6 1/8] dt-bindings: mfd: add support the SpacemiT P1 PMIC

Alex Elder
2025-06-27T14:23:14Z

Enable the SpacemiT P1, which is an I2C-controlled PMIC. Initially
only the RTC and regulators will be supported.

Signed-off-by: Alex Elder <elder@riscstar.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
v6: - Add Rob's reviewed-by tag

.../devicetree/bindings/mfd/spacemit,p1.yaml | 86 +++++++++++++++++++
1 file changed, 86 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/spacemit,p1.yaml

diff --git a/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml b/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
new file mode 100644
index 0000000000000..5cc34d4934b54
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/spacemit,p1.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/spacemit,p1.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SpacemiT P1 Power Management Integrated Circuit
+
+maintainers:
+ - Troy Mitchell <troymitchell988@gmail.com>
+
+description:
+ P1 is an I2C-controlled PMIC produced by SpacemiT. It implements six
+ constant-on-time buck converters and twelve low-dropout regulators.
+ It also contains a load switch, watchdog timer, real-time clock, eight
+ 12-bit ADC channels, and six GPIOs. Additional details are available
+ in the "Power Stone/P1" section at the following link.
+ https://developer.spacemit.com/documentation
+
+properties:
+ compatible:
+ const: spacemit,p1
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ vin-supply:
+ description: Input supply phandle.
+
+ regulators:
+ type: object
+
+ patternProperties:
+ "^(buck[1-6]|aldo[1-4]|dldo[1-7])$":
+ type: object
+ $ref: /schemas/regulator/regulator.yaml#
+ unevaluatedProperties: false
+
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pmic@41 {
+ compatible = "spacemit,p1";
+ reg = <0x41>;
+ interrupts = <64>;
+
+ regulators {
+ buck1 {
+ regulator-name = "buck1";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <3450000>;
+ regulator-ramp-delay = <5000>;
+ regulator-always-on;
+ };
+
+ aldo1 {
+ regulator-name = "aldo1";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <3400000>;
+ regulator-boot-on;
+ };
+
+ dldo1 {
+ regulator-name = "dldo1";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <3400000>;
+ regulator-boot-on;
+ };
+ };
+ };
+ };
--
2.45.2