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Message-Id: <20250731-b4-pf09-v2-v3-1-4c2659516582@nxp.com>
Date: Thu, 31 Jul 2025 18:44:41 +0800
From: Joy Zou <joy.zou@....com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, Frank Li <Frank.Li@....com>, Joy Zou <joy.zou@....com>
Subject: [PATCH v3 1/2] dt-bindings: regulator: add PF0900 regulator yaml

Add device binding doc for PF0900 PMIC driver.

Can not get the I2C_CRC_EN config by reading register. If the PMIC
OTP_I2C_CRC_EN is enable, need to add the nxp,i2c-crc-enable property.

Signed-off-by: Joy Zou <joy.zou@....com>
---
Changes for v3:
1. change regulator node names into lowercase.
2. add the following description for nxp,i2c-crc-enable.
   The CRC enabled during register read/write. Controlled by customer
   unviewable fuse bits OTP_I2C_CRC_EN. Check chip part number.
   So can not get the I2C_CRC_EN config by reading register.
   If the PMIC OTP_I2C_CRC_EN is enable, need to add this
   property.
3. add more nxp,i2c-crc-enable description for commit message.
4. remove the unnecessary nxp,dvs-run/standby-voltage.
   These changes come from review comments:
   https://lore.kernel.org/imx/e9f38e38-7df7-4d19-b5c0-2f18aeebcc78@kernel.org/
5. add regulator-state-mem property for example.

Changes for v2:
1. modify the binding file name to match compatible string.
2. add one space for dt_binding_check warning.
3. remove unnecessary quotes from "VAON".
4. remove the unnecessary empty line.
5. move unevaluatedProperties after the $ref.
6. move additionalProperties after regulator type.
7. remove unnecessary regulator description
---
 .../devicetree/bindings/regulator/nxp,pf0900.yaml  | 163 +++++++++++++++++++++
 1 file changed, 163 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/nxp,pf0900.yaml b/Documentation/devicetree/bindings/regulator/nxp,pf0900.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..8c8fc2cd4cedb0bef220d73f5cbc9a5f83072608
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/nxp,pf0900.yaml
@@ -0,0 +1,163 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/nxp,pf0900.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PF0900 Power Management Integrated Circuit regulators
+
+maintainers:
+  - Joy Zou <joy.zou@....com>
+
+description:
+  The PF0900 is a power management integrated circuit (PMIC) optimized
+  for high performance i.MX9x based applications. It features five high
+  efficiency buck converters, three linear and one vaon regulators. It
+  provides low quiescent current in Standby and low power off Modes.
+
+properties:
+  compatible:
+    enum:
+      - nxp,pf0900
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  regulators:
+    type: object
+    additionalProperties: false
+
+    properties:
+      vaon:
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+    patternProperties:
+      "^ldo[1-3]$":
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+      "^sw[1-5]$":
+        type: object
+        $ref: regulator.yaml#
+        unevaluatedProperties: false
+
+  nxp,i2c-crc-enable:
+    type: boolean
+    description:
+      The CRC enabled during register read/write. Controlled by customer
+      unviewable fuse bits OTP_I2C_CRC_EN. Check chip part number.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@8 {
+            compatible = "nxp,pf0900";
+            reg = <0x08>;
+            interrupt-parent = <&pcal6524>;
+            interrupts = <89 IRQ_TYPE_LEVEL_LOW>;
+            nxp,i2c-crc-enable;
+
+            regulators {
+                vaon {
+                    regulator-name = "VAON";
+                    regulator-min-microvolt = <1800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+
+                sw1 {
+                    regulator-name = "SW1";
+                    regulator-min-microvolt = <500000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1950>;
+                    regulator-state-mem {
+                        regulator-on-in-suspend;
+                        regulator-suspend-max-microvolt = <650000>;
+                        regulator-suspend-min-microvolt = <650000>;
+                    };
+                };
+
+                sw2 {
+                    regulator-name = "SW2";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1950>;
+                };
+
+                sw3 {
+                    regulator-name = "SW3";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1950>;
+                };
+
+                sw4 {
+                    regulator-name = "SW4";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1950>;
+                };
+
+                sw5 {
+                    regulator-name = "SW5";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1950>;
+                };
+
+                ldo1 {
+                    regulator-name = "LDO1";
+                    regulator-min-microvolt = <750000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+
+                ldo2 {
+                    regulator-name = "LDO2";
+                    regulator-min-microvolt = <650000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+
+                ldo3 {
+                    regulator-name = "LDO3";
+                    regulator-min-microvolt = <650000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-boot-on;
+                    regulator-always-on;
+                };
+            };
+        };
+     };

-- 
2.37.1


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