dt-bindings: PCI: renesas,r9a08g045s33-pcie: Document RZ/G3E SoC

Extend the existing device tree bindings for Renesas RZ/G3S PCIe
controller to include support for the RZ/G3E (renesas,r9a09g047e57-pcie)
PCIe controller. The RZ/G3E PCIe controller is similar to RZ/G3S but has
some key differences:

 - Uses a different device ID
 - Supports PCIe Gen3 (8.0 GT/s) link speeds
 - Uses a different clock naming (clkpmu vs clkl1pm)
 - Has a different set of interrupts, interrupt ordering, and reset
   signals

Add device tree bindings for renesas,r9a09g047e57-pcie compatible IPs.

Signed-off-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> # RZ/V2N EVK
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20260306143423.19562-7-john.madieu.xa@bp.renesas.com

1 files changed, 67 insertions, 6 deletions

diff --git a/Documentation/devicetree/bindings/pci/renesas,r9a08g045-pcie.yaml b/Documentation/devicetree/bindings/pci/renesas,r9a08g045-pcie.yaml
index d1eb92995e2c..a67108c48feb 100644
--- a/Documentation/devicetree/bindings/pci/renesas,r9a08g045-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/renesas,r9a08g045-pcie.yaml
@@ -10,17 +10,21 @@ maintainers:
   - Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
 
 description:
-  Renesas RZ/G3S PCIe host controller complies with PCIe Base Specification
-  4.0 and supports up to 5 GT/s (Gen2).
+  Renesas RZ/G3{E,S} PCIe host controllers comply with PCIe
+  Base Specification 4.0 and support up to 5 GT/s (Gen2) for RZ/G3S and
+  up to 8 GT/s (Gen3) for RZ/G3E.
 
 properties:
   compatible:
-    const: renesas,r9a08g045-pcie # RZ/G3S
+    enum:
+      - renesas,r9a08g045-pcie # RZ/G3S
+      - renesas,r9a09g047-pcie # RZ/G3E
 
   reg:
     maxItems: 1
 
   interrupts:
+    minItems: 16
     items:
       - description: System error interrupt
       - description: System error on correctable error interrupt
@@ -38,8 +42,16 @@ properties:
       - description: PCIe event interrupt
       - description: Message interrupt
       - description: All interrupts
+      - description: Link equalization request interrupt
+      - description: Turn off event interrupt
+      - description: PMU power off interrupt
+      - description: D3 event function 0 interrupt
+      - description: D3 event function 1 interrupt
+      - description: Configuration PMCSR write clear function 0 interrupt
+      - description: Configuration PMCSR write clear function 1 interrupt
 
   interrupt-names:
+    minItems: 16
     items:
       - const: serr
       - const: serr_cor
@@ -57,20 +69,28 @@ properties:
       - const: pcie_evt
       - const: msg
       - const: all
+      - const: link_equalization_request
+      - const: turn_off_event
+      - const: pmu_poweroff
+      - const: d3_event_f0
+      - const: d3_event_f1
+      - const: cfg_pmcsr_writeclear_f0
+      - const: cfg_pmcsr_writeclear_f1
 
   interrupt-controller: true
 
   clocks:
     items:
       - description: System clock
-      - description: PM control clock
+      - description: PM control clock or clock for L1 substate handling
 
   clock-names:
     items:
       - const: aclk
-      - const: pm
+      - enum: [pm, pmu]
 
   resets:
+    minItems: 1
     items:
       - description: AXI2PCIe Bridge reset
       - description: Data link layer/transaction layer reset
@@ -81,6 +101,7 @@ properties:
       - description: Configuration register reset
 
   reset-names:
+    minItems: 1
     items:
       - const: aresetn
       - const: rst_b
@@ -128,7 +149,9 @@ patternProperties:
         const: 0x1912
 
       device-id:
-        const: 0x0033
+        enum:
+          - 0x0033
+          - 0x0039
 
       clocks:
         items:
@@ -167,6 +190,44 @@ required:
 
 allOf:
   - $ref: /schemas/pci/pci-host-bridge.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a08g045-pcie
+    then:
+      properties:
+        interrupts:
+          maxItems: 16
+        interrupt-names:
+          maxItems: 16
+        clock-names:
+          items:
+            - const: aclk
+            - const: pm
+        resets:
+          minItems: 7
+        reset-names:
+          minItems: 7
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g047-pcie
+    then:
+      properties:
+        interrupts:
+          minItems: 23
+        interrupt-names:
+          minItems: 23
+        clock-names:
+          items:
+            - const: aclk
+            - const: pmu
+        resets:
+          maxItems: 1
+        reset-names:
+          maxItems: 1
 
 unevaluatedProperties: false