dt-bindings: net: mediatek,net: add sram property

Meditak Filogic SoCs (MT798x) have dedicated MMIO-SRAM for dma operations.

MT7981 and MT7986 currently use static offset to ethernet MAC register
which will be changed in separate patch once this way is accepted.

Add "sram" property to map ethernet controller to dedicated mmio-sram node.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20250709111147.11843-5-linux@fw-web.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/devicetree/bindings/net/mediatek,net.yaml b/Documentation/devicetree/bindings/net/mediatek,net.yaml
index d2b5461e73bcd7c6c624d4c63b26158ee2a8e3e6..b45f67f92e80dc592dab69e58ee05d131835b180 100644 (file)
--- a/Documentation/devicetree/bindings/net/mediatek,net.yaml
+++ b/Documentation/devicetree/bindings/net/mediatek,net.yaml
@@ -66,6 +66,10 @@ properties:
       - const: gmac
       - const: ppe
 
+  sram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle to mmio SRAM
+
   mediatek,ethsys:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
@@ -162,6 +166,8 @@ allOf:
             - const: gp1
             - const: gp2
 
+        sram: false
+
         mediatek,infracfg: false
 
         mediatek,wed: false
@@ -194,6 +200,8 @@ allOf:
             - const: ethif
             - const: fe
 
+        sram: false
+
         mediatek,infracfg: false
 
         mediatek,wed: false
@@ -233,6 +241,8 @@ allOf:
             - const: sgmii_ck
             - const: eth2pll
 
+        sram: false
+
         mediatek,infracfg: false
 
         mediatek,sgmiisys:
@@ -283,6 +293,8 @@ allOf:
             - const: sgmii_ck
             - const: eth2pll
 
+        sram: false
+
         mediatek,sgmiisys:
           minItems: 2
           maxItems: 2