[PATCH 2/4] dt-bindings: memory: mediatek: Add smi-sub-common property for reset

[friday.yang <friday.yang@mediatek.com>]

On the MediaTek platform, some SMI LARBs are directly linked to SMI
common. While some SMI LARBs are linked to SMI sub common, then SMI
sub common is linked to SMI common. Add 'mediatek,smi-sub-comm' and
'mediatek,smi-sub-comm-in-portid' properties here. The SMI reset
driver could query which port of the SMI sub common the current LARB
is linked to through the two properties. The hardware block diagram
could be described as below.

             SMI Common(Smart Multimedia Interface Common)
                 |
         +----------------+-------
         |                |
         |                |
         |                |
         |                |
         |                |
       larb0       SMI Sub Common
                   |      |     |
                  larb1  larb2 larb3

Signed-off-by: friday.yang <friday.yang@mediatek.com>
---
 .../mediatek,smi-common.yaml                  |  2 ++
 .../memory-controllers/mediatek,smi-larb.yaml | 22 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
index 2f36ac23604c..4392d349878c 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
@@ -39,6 +39,7 @@ properties:
           - mediatek,mt8186-smi-common
           - mediatek,mt8188-smi-common-vdo
           - mediatek,mt8188-smi-common-vpp
+          - mediatek,mt8188-smi-sub-common
           - mediatek,mt8192-smi-common
           - mediatek,mt8195-smi-common-vdo
           - mediatek,mt8195-smi-common-vpp
@@ -107,6 +108,7 @@ allOf:
         compatible:
           contains:
             enum:
+              - mediatek,mt8188-smi-sub-common
               - mediatek,mt8195-smi-sub-common
     then:
       required:
diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
index 2381660b324c..5f162bb360db 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
@@ -69,6 +69,16 @@ properties:
     description: the hardware id of this larb. It's only required when this
       hardware id is not consecutive from its M4U point of view.
 
+  mediatek,smi-sub-comm:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: a phandle of smi_sub_common that the larb is linked to.
+
+  mediatek,smi-sub-comm-in-portid:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 7
+    description: which port of smi_sub_common that the larb is linked to.
+
 required:
   - compatible
   - reg
@@ -125,6 +135,18 @@ allOf:
       required:
         - mediatek,larb-id
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8188-smi-larb
+
+    then:
+      required:
+        - mediatek,smi-sub-comm
+        - mediatek,smi-sub-comm-in-portid
+
 additionalProperties: false
 
 examples:
-- 
2.46.0