dt-bindings: leds: pca955x: Convert text bindings to YAML

Convert the text bindings of pca955x to YAML so it could be used to
validate the DTS.

Signed-off-by: Ricky CX Wu <[e-mail]>
Signed-off-by: Delphine CC Chiu <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

Documentation/devicetree/bindings/leds/leds-pca955x.txt

···
-* NXP - pca955x LED driver
-
-The PCA955x family of chips are I2C LED blinkers whose pins not used
-to control LEDs can be used as general purpose I/Os. The GPIO pins can
-be input or output, and output pins can also be pulse-width controlled.
-
-Required properties:
-- compatible : should be one of :
-	"nxp,pca9550"
-	"nxp,pca9551"
-	"nxp,pca9552"
-	"ibm,pca9552"
-	"nxp,pca9553"
-- #address-cells: must be 1
-- #size-cells: must be 0
-- reg: I2C slave address. depends on the model.
-
-Optional properties:
-- gpio-controller: allows pins to be used as GPIOs.
-- #gpio-cells: must be 2.
-- gpio-line-names: define the names of the GPIO lines
-
-LED sub-node properties:
-- reg : number of LED line.
-		from 0 to  1 for the pca9550
-		from 0 to  7 for the pca9551
-		from 0 to 15 for the pca9552
-		from 0 to  3 for the pca9553
-- type: (optional) either
-	PCA955X_TYPE_NONE
-	PCA955X_TYPE_LED
-	PCA955X_TYPE_GPIO
-	see dt-bindings/leds/leds-pca955x.h (default to LED)
-- label : (optional)
-	see Documentation/devicetree/bindings/leds/common.txt
-- linux,default-trigger : (optional)
-	see Documentation/devicetree/bindings/leds/common.txt
-
-Examples:
-
-pca9552: pca9552@60 {
-	compatible = "nxp,pca9552";
-	#address-cells = <1>;
-        #size-cells = <0>;
-	reg = <0x60>;
-
-	gpio-controller;
-	#gpio-cells = <2>;
-	gpio-line-names = "GPIO12", "GPIO13", "GPIO14", "GPIO15";
-
-	gpio@12 {
-		reg = <12>;
-		type = <PCA955X_TYPE_GPIO>;
-	};
-	gpio@13 {
-		reg = <13>;
-		type = <PCA955X_TYPE_GPIO>;
-	};
-	gpio@14 {
-		reg = <14>;
-		type = <PCA955X_TYPE_GPIO>;
-	};
-	gpio@15 {
-		reg = <15>;
-		type = <PCA955X_TYPE_GPIO>;
-	};
-
-	led@0 {
-		label = "red:power";
-		linux,default-trigger = "default-on";
-		reg = <0>;
-		type = <PCA955X_TYPE_LED>;
-	};
-	led@1 {
-		label = "green:power";
-		reg = <1>;
-		type = <PCA955X_TYPE_LED>;
-	};
-	led@2 {
-		label = "pca9552:yellow";
-		reg = <2>;
-		type = <PCA955X_TYPE_LED>;
-	};
-	led@3 {
-		label = "pca9552:white";
-		reg = <3>;
-		type = <PCA955X_TYPE_LED>;
-	};
-};

Documentation/devicetree/bindings/leds/nxp,pca955x.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/nxp,pca955x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCA955X LED controllers
+
+maintainers:
+  - Nate Case <[e-mail]>
+
+description: |
+  The PCA955x family of chips are I2C LED blinkers whose pins not used
+  to control LEDs can be used as general purpose I/Os. The GPIO pins can
+  be input or output, and output pins can also be pulse-width controlled.
+
+  For more product information please see the link below:
+  - https://www.nxp.com/docs/en/data-sheet/PCA9552.pdf
+
+properties:
+  compatible:
+    enum:
+      - nxp,pca9550
+      - nxp,pca9551
+      - nxp,pca9552
+      - ibm,pca9552
+      - nxp,pca9553
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  gpio-controller: true
+
+  gpio-line-names:
+    minItems: 1
+    maxItems: 16
+
+  "#gpio-cells":
+    const: 2
+
+patternProperties:
+  "^led@[0-9a-f]$":
+    type: object
+    $ref: common.yaml#
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        maxItems: 1
+      type:
+        description: |
+          Output configuration, see include/dt-bindings/leds/leds-pca955x.h
+        $ref: /schemas/types.yaml#/definitions/uint32
+        default: 0
+        minimum: 0
+        maximum: 2
+
+    required:
+      - reg
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nxp,pca9550
+    then:
+      patternProperties:
+        "^led@[0-9a-f]$":
+          properties:
+            reg:
+              maximum: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nxp,pca9551
+    then:
+      patternProperties:
+        "^led@[0-9a-f]$":
+          properties:
+            reg:
+              maximum: 7
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nxp,pca9552
+              - ibm,pca9552
+    then:
+      patternProperties:
+        "^led@[0-9a-f]$":
+          properties:
+            reg:
+              maximum: 15
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - nxp,pca9553
+    then:
+      patternProperties:
+        "^led@[0-9a-f]$":
+          properties:
+            reg:
+              maximum: 3
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/leds/leds-pca955x.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led-controller@60 {
+            compatible = "nxp,pca9552";
+            reg = <0x60>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            led@0 {
+                reg = <0>;
+                label = "red:power";
+                linux,default-trigger = "default-on";
+                type = <PCA955X_TYPE_LED>;
+            };
+            led@1 {
+                reg = <1>;
+                label = "green:power";
+                type = <PCA955X_TYPE_LED>;
+            };
+            led@2 {
+                reg = <2>;
+                label = "pca9552:yellow";
+                type = <PCA955X_TYPE_LED>;
+            };
+            led@3 {
+                reg = <3>;
+                label = "pca9552:white";
+                type = <PCA955X_TYPE_LED>;
+            };
+        };
+    };
+
+...