[PATCH v3 1/6] dt-bindings: PCI: rcar-gen4-pci-host: Add R-Car X5H PCIe4 compatible

Document bindings for R-Car X5H (R8A78000) PCIe4 host module.

The binding document is deliberately using "renesas,rcar-gen5-pcie4"
DT compatible string to discern R-Car X5H PCIe4 controller supported
by this binding, from R-Car X5H PCIe6 controller which will use a
separate binding.

The R-Car X5H PCIe4 controller does no longer include PHY register
range, the PHY is now a separate IP and referenced via the 'phy' DT
property. The 'reg' and 'reg-names' DT properties therefore differ
between R-Car Gen4 PCIe and R-Car X5H PCIe4, and the difference is
handled in the allOf section.

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Marek Vasut <[email protected]>
---
Cc: "Krzysztof Wilczyński" <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Conor Dooley <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Krzysztof Kozlowski <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Manivannan Sadhasivam <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Yoshihiro Shimoda <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
V2: Add RB from Krzysztof
V3: No change
---
 .../bindings/pci/rcar-gen4-pci-host.yaml      | 74 +++++++++++++------
 1 file changed, 52 insertions(+), 22 deletions(-)

diff --git a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
index 64f456c6a75a1..9767a52f3904e 100644
--- a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
+++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
@@ -10,30 +10,20 @@ title: Renesas R-Car Gen4 PCIe Host
 maintainers:
   - Yoshihiro Shimoda <[email protected]>
 
-allOf:
-  - $ref: snps,dw-pcie.yaml#
-
 properties:
   compatible:
-    items:
-      - enum:
-          - renesas,r8a779f0-pcie      # R-Car S4-8
-          - renesas,r8a779g0-pcie      # R-Car V4H
-          - renesas,r8a779h0-pcie      # R-Car V4M
-      - const: renesas,rcar-gen4-pcie  # R-Car Gen4
-
-  reg:
-    maxItems: 7
-
-  reg-names:
-    items:
-      - const: dbi
-      - const: dbi2
-      - const: atu
-      - const: dma
-      - const: app
-      - const: phy
-      - const: config
+    oneOf:
+      - items:
+          - enum:
+              - renesas,r8a779f0-pcie      # R-Car S4-8
+              - renesas,r8a779g0-pcie      # R-Car V4H
+              - renesas,r8a779h0-pcie      # R-Car V4M
+          - const: renesas,rcar-gen4-pcie  # R-Car Gen4
+
+      - items:
+          - enum:
+              - renesas,r8a78000-pcie4     # R-Car X5H PCIe4
+          - const: renesas,rcar-gen5-pcie4 # R-Car Gen5 PCIe4
 
   interrupts:
     maxItems: 4
@@ -84,6 +74,46 @@ required:
   - resets
   - reset-names
 
+allOf:
+  - $ref: snps,dw-pcie.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,rcar-gen4-pcie
+    then:
+      properties:
+        reg:
+          maxItems: 7
+
+        reg-names:
+          items:
+            - const: dbi
+            - const: dbi2
+            - const: atu
+            - const: dma
+            - const: app
+            - const: phy
+            - const: config
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,rcar-gen5-pcie4
+    then:
+      properties:
+        reg:
+          maxItems: 6
+
+        reg-names:
+          items:
+            - const: dbi
+            - const: dbi2
+            - const: atu
+            - const: dma
+            - const: app
+            - const: config
+
 unevaluatedProperties: false
 
 examples:
-- 
2.53.0