linux-kernel - [PATCH v4 1/5] dt-bindings: iommu: mediatek: Add mediatek,infracfg phandle

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Message-Id: <20220616110830.26037-2-angelogioacchino.delregno@collabora.com>
Date:   Thu, 16 Jun 2022 13:08:26 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     yong.wu@...iatek.com
Cc:     joro@...tes.org, will@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        iommu@...ts.linux-foundation.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        krzysztof.kozlowski@...aro.org, miles.chen@...iatek.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v4 1/5] dt-bindings: iommu: mediatek: Add mediatek,infracfg phandle

Add property "mediatek,infracfg" to let the mtk_iommu driver retrieve
a phandle to the infracfg syscon instead of performing a per-soc
compatible lookup in the entire devicetree and set it as a required
property for MT2712 and MT8173.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 .../bindings/iommu/mediatek,iommu.yaml          | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
index 2ae3bbad7f1a..fee0241b5098 100644
--- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
+++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.yaml
@@ -101,6 +101,10 @@ properties:
     items:
       - const: bclk
 
+  mediatek,infracfg:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: The phandle to the mediatek infracfg syscon
+
   mediatek,larbs:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     minItems: 1
@@ -167,6 +171,18 @@ allOf:
       required:
         - power-domains
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt2712-m4u
+              - mediatek,mt8173-m4u
+
+    then:
+      required:
+        - mediatek,infracfg
+
   - if: # The IOMMUs don't have larbs.
       not:
         properties:
@@ -191,6 +207,7 @@ examples:
             interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_LOW>;
             clocks = <&infracfg CLK_INFRA_M4U>;
             clock-names = "bclk";
+            mediatek,infracfg = <&infracfg>;
             mediatek,larbs = <&larb0>, <&larb1>, <&larb2>,
                              <&larb3>, <&larb4>, <&larb5>;
             #iommu-cells = <1>;
-- 
2.35.1