linux-kernel - [PATCH 2/3] dt-bindings: regulator: Add Fitipower FP9931/JD9930

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Message-Id: <20251107-fp9931-submit-v1-2-aa7b79d9abb6@kemnade.info>
Date: Fri, 07 Nov 2025 21:06:45 +0100
From: Andreas Kemnade <andreas@...nade.info>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Liam Girdwood <lgirdwood@...il.com>, 
 Mark Brown <broonie@...nel.org>, Guenter Roeck <linux@...ck-us.net>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-hwmon@...r.kernel.org, Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH 2/3] dt-bindings: regulator: Add Fitipower FP9931/JD9930

Document the FP9931/JD9930. As the FP9931 is a clear subset of the JD9930,
define it as a fallback compatible. GPIO names are same as in the datasheet
except for the EN pad which is described as "enable".

Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 .../devicetree/bindings/regulator/fiti,fp9931.yaml | 133 +++++++++++++++++++++
 1 file changed, 133 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/fiti,fp9931.yaml b/Documentation/devicetree/bindings/regulator/fiti,fp9931.yaml
new file mode 100644
index 000000000000..ce44040a3c02
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/fiti,fp9931.yaml
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/fiti,fp9931.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: FitiPower FP9931/JD9930 Power Management Integrated Circuit
+
+maintainers:
+  - Andreas Kemnade <andreas@...nade.info>
+
+description:
+  FP9931 is a Power Management IC to provide Power for EPDs with one 3.3V
+  switch, 2 symmetric LDOs behind 2 DC/DC converters, and one unsymmetric
+  regulator for a compensation voltage.
+  JD9930 has in addition some kind of night mode.
+
+properties:
+  compatible:
+    oneOf:
+      - const: fiti,fp9931
+
+      - items:
+          - const: fiti,jd9930
+          - const: fiti,fp9931
+
+  reg:
+    maxItems: 1
+
+  '#thermal-sensor-cells':
+    const: 0
+
+  enable-gpios:
+    maxItems: 1
+
+  pg-gpios:
+    maxItems: 1
+
+  ts-en-gpios:
+    maxItems: 1
+
+  xon-gpios:
+    maxItems: 1
+
+  vin-supply:
+    description:
+      Supply for the whole chip. Some vendor kernels and devicetrees
+      declare this as a non-existing GPIO named "pwrall".
+
+  fiti,tdly:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      Power up soft start delay settings tDLY1-4 bitfields in the
+      POWERON_DELAY register
+
+    minItems: 4
+    maxItems: 4
+
+  VCOM:
+    type: object
+    $ref: /schemas/regulator/regulator.yaml#
+    unevaluatedProperties: false
+    description:
+      The regulator for the compenstation voltage.
+    properties:
+      regulator-name:
+        const: VCOM
+
+  VPOSNEG:
+    type: object
+    $ref: /schemas/regulator/regulator.yaml#
+    unevaluatedProperties: false
+    description:
+      The pair of symmetric LDOs
+    properties:
+      regulator-name:
+        const: VPOSNEG
+
+  V3P3:
+    type: object
+    $ref: /schemas/regulator/regulator.yaml#
+    unevaluatedProperties: false
+    description:
+      The pair of symmetric LDOs
+    properties:
+      regulator-name:
+        const: V3P3
+
+required:
+  - compatible
+  - reg
+  - '#thermal-sensor-cells'
+  - pg-gpios
+  - enable-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fp9931: pmic@18 {
+          compatible = "fiti,fp9931";
+          reg = <0x18>;
+          pinctrl-names = "default";
+          pinctrl-0 = <&pinctrl_fp9931_gpio>;
+          #thermal-sensor-cells = <0>;
+          vin-supply = <&epd_pmic_supply>;
+          pg-gpios = <&gpio2 7 GPIO_ACTIVE_HIGH>;
+          ts-en-gpios = <&gpio2 9 GPIO_ACTIVE_HIGH>;
+          enable-gpios = <&gpio2 8 GPIO_ACTIVE_HIGH>;
+          fiti,tdly = <2 2 3 3>;
+
+          vcom_reg: VCOM {
+            regulator-name = "VCOM";
+            regulator-min-microvolt = <2352840>;
+            regulator-max-microvolt = <2352840>;
+          };
+
+          vposneg_reg: VPOSNEG {
+            regulator-name = "VPOSNEG";
+            regulator-min-microvolt = <15060000>;
+            regulator-max-microvolt = <15060000>;
+          };
+
+          v3p3_reg: V3P3 {
+            regulator-name = "V3P3";
+          };
+        };
+    };

-- 
2.47.3