[PATCH v6 3/5] dt-bindings: spi: mtk-snfi: Add compatible for MT7986

[Xiangsheng Hou <xiangsheng.hou@mediatek.com>]

Add dt-bindings documentation of SPI NAND controller
for MediaTek MT7986 SoC platform. And add optional
nfi_hclk property which is needed for MT7986.

Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../bindings/spi/mediatek,spi-mtk-snfi.yaml   | 51 +++++++++++++++----
 1 file changed, 42 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
index 6e6e02c91780..bab23f1b11fd 100644
--- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
+++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
@@ -18,14 +18,12 @@ description: |
   using the accompanying ECC engine. There should be only one spi
   slave device following generic spi bindings.
 
-allOf:
-  - $ref: /schemas/spi/spi-controller.yaml#
-
 properties:
   compatible:
     enum:
       - mediatek,mt7622-snand
       - mediatek,mt7629-snand
+      - mediatek,mt7986-snand
 
   reg:
     items:
@@ -36,14 +34,12 @@ properties:
       - description: NFI interrupt
 
   clocks:
-    items:
-      - description: clock used for the controller
-      - description: clock used for the SPI bus
+    minItems: 2
+    maxItems: 3
 
   clock-names:
-    items:
-      - const: nfi_clk
-      - const: pad_clk
+    minItems: 2
+    maxItems: 3
 
   nand-ecc-engine:
     description: device-tree node of the accompanying ECC engine.
@@ -57,6 +53,43 @@ required:
   - clock-names
   - nand-ecc-engine
 
+allOf:
+  - $ref: /schemas/spi/spi-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          enum:
+            - mediatek,mt7622-snand
+            - mediatek,mt7629-snand
+    then:
+      properties:
+        clocks:
+          items:
+            - description: clock used for the controller
+            - description: clock used for the SPI bus
+        clock-names:
+          items:
+            - const: nfi_clk
+            - const: pad_clk
+
+  - if:
+      properties:
+        compatible:
+          enum:
+            - mediatek,mt7986-snand
+    then:
+      properties:
+        clocks:
+          items:
+            - description: clock used for the controller
+            - description: clock used for the SPI bus
+            - description: clock used for the AHB bus
+        clock-names:
+          items:
+            - const: nfi_clk
+            - const: pad_clk
+            - const: nfi_hclk
+
 unevaluatedProperties: false
 
 examples:
-- 
2.25.1