[PATCH v4] dt-bindings: ata: Add UniPhier controller binding

[Kunihiko Hayashi]

Add UniPhier SATA controller compatible string to the platform binding.
This controller needs three reset controls for Pro4 SoC, or two reset
controls for PXs2 and PXs3 SoCs.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
---
 .../bindings/ata/ahci-platform.yaml           | 49 +++++++++++++++++--
 1 file changed, 45 insertions(+), 4 deletions(-)

Changes since v3:
- Fix the position of resets and allOf properties
- Add reset descriptions
- Separate if conditions for two resets, three resets, and others

Changes since v2:
- Add compatible strings to select property
- Add minItems and change maxItems for resets
- Move condition schema under allOf property
- Change resets to "required" for uniphier-*-ahci

Changes since v1:
- Restrict resets property changes with compatible strings
- Fix maxItems from two to three

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.yaml b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
index 7dc2a2e8f598..358617115bb8 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.yaml
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
@@ -30,12 +30,12 @@ select:
           - marvell,armada-3700-ahci
           - marvell,armada-8k-ahci
           - marvell,berlin2q-ahci
+          - socionext,uniphier-pro4-ahci
+          - socionext,uniphier-pxs2-ahci
+          - socionext,uniphier-pxs3-ahci
   required:
     - compatible
 
-allOf:
-  - $ref: "ahci-common.yaml#"
-
 properties:
   compatible:
     oneOf:
@@ -45,6 +45,9 @@ properties:
               - marvell,armada-8k-ahci
               - marvell,berlin2-ahci
               - marvell,berlin2q-ahci
+              - socionext,uniphier-pro4-ahci
+              - socionext,uniphier-pxs2-ahci
+              - socionext,uniphier-pxs3-ahci
           - const: generic-ahci
       - enum:
           - cavium,octeon-7130-ahci
@@ -74,7 +77,8 @@ properties:
     maxItems: 1
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
 
 patternProperties:
   "^sata-port@[0-9a-f]+$":
@@ -91,6 +95,43 @@ required:
   - reg
   - interrupts
 
+allOf:
+  - $ref: ahci-common.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: socionext,uniphier-pro4-ahci
+    then:
+      properties:
+        resets:
+          items:
+            - description: reset line for the parent
+            - description: reset line for the glue logic
+            - description: reset line for the controller
+      required:
+        - resets
+    else:
+      if:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - socionext,uniphier-pxs2-ahci
+                - socionext,uniphier-pxs3-ahci
+      then:
+        properties:
+          resets:
+            items:
+              - description: reset for the glue logic
+              - description: reset for the controller
+        required:
+          - resets
+      else:
+        properties:
+          resets:
+            maxItems: 1
+
 unevaluatedProperties: false
 
 examples:
-- 
2.25.1