[PW_SID:1078972] pwm: spacemit: Add Support for K3 SoC

Documentation/devicetree/bindings/pwm/marvell,pxa-pwm.yaml

@@ -15,7 +15,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: spacemit,k1-pwm
+            enum:
+              - spacemit,k1-pwm
+              - spacemit,k3-pwm
     then:
       properties:
         "#pwm-cells":
@@ -26,6 +28,38 @@ allOf:
           const: 1
           description: |
             Used for specifying the period length in nanoseconds.
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - spacemit,k3-pwm
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: func
+            - const: bus
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - spacemit,k3-pwm
+    then:
+      required:
+        - clock-names
+      properties:
+        clocks:
+          minItems: 2
+        clock-names:
+          minItems: 2
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+        clock-names:
+          maxItems: 1
 
 properties:
   compatible:
@@ -36,7 +70,9 @@ properties:
           - marvell,pxa168-pwm
           - marvell,pxa910-pwm
       - items:
-          - const: spacemit,k1-pwm
+          - enum:
+              - spacemit,k1-pwm
+              - spacemit,k3-pwm
           - const: marvell,pxa910-pwm
 
   reg:
@@ -47,7 +83,18 @@ properties:
     description: Number of cells in a pwm specifier.
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    items:
+      - description: The function clock
+      - description: An optional bus clock
+
+  clock-names:
+    minItems: 1
+    maxItems: 2
+    oneOf:
+      - items:
+          - const: func
+          - const: bus
 
   resets:
     maxItems: 1

drivers/pwm/pwm-pxa.c

@@ -53,6 +53,7 @@ struct pxa_pwm_chip {
 	struct device	*dev;
 
 	struct clk	*clk;
+	struct clk	*bus_clk;
 	void __iomem	*mmio_base;
 };
 
@@ -177,7 +178,12 @@ static int pwm_probe(struct platform_device *pdev)
 		return PTR_ERR(chip);
 	pc = to_pxa_pwm_chip(chip);
 
-	pc->clk = devm_clk_get(dev, NULL);
+	pc->bus_clk = devm_clk_get_optional_enabled(dev, "bus");
+	if (IS_ERR(pc->bus_clk))
+		return dev_err_probe(dev, PTR_ERR(pc->bus_clk), "Failed to get bus clock\n");
+
+	/* Get named func clk if bus clock is valid */
+	pc->clk = devm_clk_get(dev, pc->bus_clk ? "func" : NULL);
 	if (IS_ERR(pc->clk))
 		return dev_err_probe(dev, PTR_ERR(pc->clk), "Failed to get clock\n");