[PATCH] spi: dt-bindings: mediatek,spi-mtk-nor: Add clock bindings for mt8189

[Meiker Gao]

Update mediatek,spi-mtk-nor.yaml to add conditional clock and
clock-names bindings for the mt8189-nor platform. The mt8189-nor
controller requires five specific clocks and corresponding clock-names
("spi", "sf", "axi_f", "axi_h", "axi_p"). This change enforces these
requirements in the device tree binding schema.

For other platforms, the minimum number of clocks and clock-names
remains unchanged. The patch also adds an example for mt8189-nor,
illustrating the new clock configuration.

This update ensures correct hardware description and validation for
mt8189-nor, improving compatibility and reducing configuration errors.

Signed-off-by: Meiker Gao <ot_meiker.gao at mediatek.com>
(cherry picked from commit c3180d35e52b5213764a89403e71f9a34d7bb842)
---
 .../bindings/spi/mediatek,spi-mtk-nor.yaml    | 45 ++++++++++++++-----
 1 file changed, 33 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml
index a453996c13f2..bd6f43a0c399 100644
--- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml
+++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-nor.yaml
@@ -17,9 +17,6 @@ description: |
   for devices other than SPI NOR flash due to limited transfer
   capability of this controller.
 
-allOf:
-  - $ref: /schemas/spi/spi-controller.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -27,6 +24,7 @@ properties:
           - mediatek,mt8173-nor
           - mediatek,mt8186-nor
           - mediatek,mt8192-nor
+          - mediatek,mt8189-nor
       - items:
           - enum:
               - mediatek,mt2701-nor
@@ -39,6 +37,7 @@ properties:
       - items:
           - enum:
               - mediatek,mt8188-nor
+              - mediatek,mt8189-nor
           - const: mediatek,mt8186-nor
 
   reg:
@@ -56,14 +55,8 @@ properties:
                      design, so this is optional.
       - description: clock used for controller axi slave bus.
                      this depends on hardware design, so it is optional.
-
-  clock-names:
-    minItems: 2
-    items:
-      - const: spi
-      - const: sf
-      - const: axi
-      - const: axi_s
+      - description: clock used for controller axi_f, axi_h, and
+                     axi_p to support the new platform.
 
 required:
   - compatible
@@ -71,6 +64,34 @@ required:
   - clocks
   - clock-names
 
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8189-nor
+    then:
+      properties:
+        clocks:
+          maxItems: 5
+        clock-names:
+          items:
+            - const: spi
+            - const: sf
+            - const: axi_f
+            - const: axi_h
+            - const: axi_p
+    else:
+      properties:
+        clocks:
+          maxItems: 4
+        clock-names:
+          items:
+            - const: spi
+            - const: sf
+            - const: axi
+
 unevaluatedProperties: false
 
 examples:
@@ -81,7 +102,7 @@ examples:
       #address-cells = <2>;
       #size-cells = <2>;
 
-      nor_flash: spi at 1100d000 {
+      spi at 1100d000 {
         compatible = "mediatek,mt8173-nor";
         reg = <0 0x1100d000 0 0xe0>;
         interrupts = <1>;
-- 
2.45.2