[PATCH v2 2/9] mfd: dt-bindings: ti,twl6040: convert to DT schema

[Jihed Chaibi <jihed.chaibi.dev@gmail.com>]

Convert the legacy TXT binding for the TWL6040 MFD to the modern YAML
DT schema format. This adds formal validation and improves documentation
for the TWL6040/TWL6041 audio codec, which provides audio, vibra, and GPO
functionality on OMAP4+ platforms.

Changes in v2:
- Renamed twl6040,audpwron-gpio to ti,audpwron-gpio for consistency
  with TI naming, this fixes the dt_binding_check vendor name  error.
- Minor description clarifications for improved readability.

Signed-off-by: Jihed Chaibi <jihed.chaibi.dev@gmail.com>
---
 .../devicetree/bindings/mfd/ti,twl6040.yaml   | 155 ++++++++++++++++++
 .../devicetree/bindings/mfd/twl6040.txt       |  67 --------
 2 files changed, 155 insertions(+), 67 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,twl6040.yaml
 delete mode 100644 Documentation/devicetree/bindings/mfd/twl6040.txt

diff --git a/Documentation/devicetree/bindings/mfd/ti,twl6040.yaml b/Documentation/devicetree/bindings/mfd/ti,twl6040.yaml
new file mode 100644
index 000000000..7365e4c04
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,twl6040.yaml
@@ -0,0 +1,155 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,twl6040.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL6040/TWL6041 Audio Codec
+
+maintainers:
+  - Peter Ujfalusi <peter.ujfalusi@gmail.com>
+
+description:
+  The TWL6040s are 8-channel high quality low-power audio codecs providing
+  audio, vibra and GPO functionality on OMAP4+ platforms.
+  They are connected to the host processor via i2c for commands, McPDM for
+  audio data and commands.
+
+properties:
+  compatible:
+    enum:
+      - ti,twl6040
+      - ti,twl6041
+
+  reg:
+    const: 0x4b
+
+  interrupts:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 1
+
+  '#clock-cells':
+    description: TWL6040 is a provider of PDMCLK which is used by McPDM.
+    const: 0
+
+  ti,audpwron-gpio:
+    description: The GPIO specifier for the audio power-on line.
+    maxItems: 1
+
+  vio-supply:
+    description: Regulator for the VIO supply.
+
+  v2v1-supply:
+    description: Regulator for the V2V1 supply.
+
+  enable-active-high:
+    type: boolean
+    description: If present, powers on the device during boot.
+
+  clocks:
+    minItems: 1
+    maxItems: 2
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      enum: [clk32k, mclk]
+
+  # Vibra functionality :
+
+  vddvibl-supply:
+    description: Regulator for the left vibra motor supply.
+
+  vddvibr-supply:
+    description: Regulator for the right vibra motor supply.
+
+  vibra:
+    type: object
+    description: Node for vibra motor configuration parameters.
+    properties:
+      ti,vibldrv-res:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Resistance parameter for the left driver.
+
+      ti,vibrdrv-res:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Resistance parameter for the right driver.
+
+      ti,viblmotor-res:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Resistance parameter for the left motor.
+
+      ti,vibrmotor-res:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Resistance parameter for the right motor.
+
+      vddvibl_uV:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Optional override for the VDDVIBL default voltage (in uV).
+
+      vddvibr_uV:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: Optional override for the VDDVIBR default voltage (in uV).
+    required:
+      - ti,vibldrv-res
+      - ti,vibrdrv-res
+      - ti,viblmotor-res
+      - ti,vibrmotor-res
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - gpio-controller
+  - '#gpio-cells'
+  - '#clock-cells'
+  - ti,audpwron-gpio
+  - vio-supply
+  - v2v1-supply
+  - vddvibl-supply
+  - vddvibr-supply
+  - vibra
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      twl6040: twl@4b {
+        compatible = "ti,twl6040";
+        reg = <0x4b>;
+
+        interrupts = <0 119 4>;
+        interrupt-parent = <&gic>;
+
+        gpio-controller;
+        #gpio-cells = <1>;
+        #clock-cells = <0>;
+        ti,audpwron-gpio = <&gpio4 31 0>;
+
+        vio-supply = <&v1v8>;
+        v2v1-supply = <&v2v1>;
+        enable-active-high;
+
+        /* regulators for vibra motor */
+        vddvibl-supply = <&vbat>;
+        vddvibr-supply = <&vbat>;
+
+        vibra {
+          /* Vibra driver, motor resistance parameters */
+          ti,vibldrv-res = <8>;
+          ti,vibrdrv-res = <3>;
+          ti,viblmotor-res = <10>;
+          ti,vibrmotor-res = <10>;
+        };
+      };
+    };
diff --git a/Documentation/devicetree/bindings/mfd/twl6040.txt b/Documentation/devicetree/bindings/mfd/twl6040.txt
deleted file mode 100644
index dfd8683ed..000000000
--- a/Documentation/devicetree/bindings/mfd/twl6040.txt
+++ /dev/null
@@ -1,67 +0,0 @@
-Texas Instruments TWL6040 family
-
-The TWL6040s are 8-channel high quality low-power audio codecs providing audio,
-vibra and GPO functionality on OMAP4+ platforms.
-They are connected to the host processor via i2c for commands, McPDM for audio
-data and commands.
-
-Required properties:
-- compatible : "ti,twl6040" for twl6040, "ti,twl6041" for twl6041
-- reg: must be 0x4b for i2c address
-- interrupts: twl6040 has one interrupt line connecteded to the main SoC
-- gpio-controller:
-- #gpio-cells = <1>: twl6040 provides GPO lines.
-- #clock-cells = <0>; twl6040 is a provider of pdmclk which is used by McPDM
-- twl6040,audpwron-gpio: Power on GPIO line for the twl6040
-
-- vio-supply: Regulator for the twl6040 VIO supply
-- v2v1-supply: Regulator for the twl6040 V2V1 supply
-
-Optional properties, nodes:
-- enable-active-high: To power on the twl6040 during boot.
-- clocks: phandle to the clk32k and/or to mclk clock provider
-- clock-names: Must be "clk32k" for the 32K clock and "mclk" for the MCLK.
-
-Vibra functionality
-Required properties:
-- vddvibl-supply: Regulator for the left vibra motor
-- vddvibr-supply: Regulator for the right vibra motor
-- vibra { }: Configuration section for vibra parameters containing the following
-	     properties:
-- ti,vibldrv-res: Resistance parameter for left driver
-- ti,vibrdrv-res: Resistance parameter for right driver
-- ti,viblmotor-res: Resistance parameter for left motor
-- ti,viblmotor-res: Resistance parameter for right motor
-
-Optional properties within vibra { } section:
-- vddvibl_uV: If the vddvibl default voltage need to be changed
-- vddvibr_uV: If the vddvibr default voltage need to be changed
-
-Example:
-&i2c1 {
-	twl6040: twl@4b {
-		compatible = "ti,twl6040";
-
-		interrupts = <0 119 4>;
-		interrupt-parent = <&gic>;
-		twl6040,audpwron-gpio = <&gpio4 31 0>;
-
-		vio-supply = <&v1v8>;
-		v2v1-supply = <&v2v1>;
-		enable-active-high;
-
-		/* regulators for vibra motor */
-		vddvibl-supply = <&vbat>;
-		vddvibr-supply = <&vbat>;
-
-		vibra {
-			/* Vibra driver, motor resistance parameters */
-			ti,vibldrv-res = <8>;
-			ti,vibrdrv-res = <3>;
-			ti,viblmotor-res = <10>;
-			ti,vibrmotor-res = <10>;
-		};
-	};
-};
-
-/include/ "twl6040.dtsi"
-- 
2.39.5