Re: [PATCH v4 1/3] dt-bindings: PCI: mediatek-gen3: Support mt8195

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Il 28/10/22 11:43, Tinghan Shen ha scritto:
From: Jianjun Wang <jianjun.wang@xxxxxxxxxxxx>

In order to support mt8195 pcie node, update the yaml to support new
properties of iommu and power-domain, and update the reset-names
property to allow only one 'mac' name.

Signed-off-by: Jianjun Wang <jianjun.wang@xxxxxxxxxxxx>
Signed-off-by: TingHan Shen <tinghan.shen@xxxxxxxxxxxx>
---
  .../bindings/pci/mediatek-pcie-gen3.yaml         | 16 +++++++++++++---
  1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
index c00be39af64e..a9013c10131a 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
@@ -70,14 +70,21 @@ properties:
      minItems: 1
      maxItems: 8
+ iommu-map:
+    maxItems: 1
+
+  iommu-map-mask:
+    const: 0
+
    resets:
      minItems: 1
      maxItems: 2
reset-names:
-    minItems: 1
-    items:
-      - const: phy
+    oneOf:
+      - items:
+          - const: phy
+          - const: mac
        - const: mac

Sorry, this looks a bit messy.

I can propose two solutions, either:

reset-names:
  minItems: 1
  items:
    - const: mac
    - const: phy
... and change the order in mt8192.dtsi;

otherwise, something like
allOf:
  - if:
     properties:
       compatible:
         contains:
           - const: mediatek,mt8195-pcie
    ... invert reset-names

I think that the first solution makes a bit more sense though, as the
PHY reset may be moved in a PCIE-PHY specific driver instead of being
managed here in pci-mediatek-gen3.

Regards,
Angelo





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