dt-bindings: PCI: rcar-pci-host: Convert bindings to json-schema

Convert Renesas PCIe Host controller bindings documentation to
json-schema. Note that some compatible doesn't contain on
the original documentation so that incremental patches are required
for it.

Link: https://lore.kernel.org/r/1604455096-13923-2-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Rob Herring <[email protected]>

Author: shimoday

Documentation/devicetree/bindings/pci/rcar-pci-host.yaml

@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2020 Renesas Electronics Corp.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/rcar-pci-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car PCIe Host
+
+maintainers:
+  - Marek Vasut <[email protected]>
+  - Yoshihiro Shimoda <[email protected]>
+
+allOf:
+  - $ref: pci-bus.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - renesas,pcie-r8a7742      # RZ/G1H
+              - renesas,pcie-r8a7743      # RZ/G1M
+              - renesas,pcie-r8a7744      # RZ/G1N
+              - renesas,pcie-r8a7790      # R-Car H2
+              - renesas,pcie-r8a7791      # R-Car M2-W
+              - renesas,pcie-r8a7793      # R-Car M2-N
+          - const: renesas,pcie-rcar-gen2 # R-Car Gen2 and RZ/G1
+      - items:
+          - enum:
+              - renesas,pcie-r8a774a1     # RZ/G2M
+              - renesas,pcie-r8a774b1     # RZ/G2N
+              - renesas,pcie-r8a774c0     # RZ/G2E
+              - renesas,pcie-r8a7795      # R-Car H3
+              - renesas,pcie-r8a7796      # R-Car M3-W
+              - renesas,pcie-r8a77961     # R-Car M3-W+
+              - renesas,pcie-r8a77980     # R-Car V3H
+              - renesas,pcie-r8a77990     # R-Car E3
+          - const: renesas,pcie-rcar-gen3 # R-Car Gen3 and RZ/G2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 3
+    maxItems: 3
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: pcie
+      - const: pcie_bus
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  phys:
+    maxItems: 1
+
+  phy-names:
+    const: pcie
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - power-domains
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7791-sysc.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie: pcie@fe000000 {
+            compatible = "renesas,pcie-r8a7791", "renesas,pcie-rcar-gen2";
+            reg = <0 0xfe000000 0 0x80000>;
+             #address-cells = <3>;
+             #size-cells = <2>;
+             bus-range = <0x00 0xff>;
+             device_type = "pci";
+             ranges = <0x01000000 0 0x00000000 0 0xfe100000 0 0x00100000>,
+                      <0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000>,
+                      <0x02000000 0 0x30000000 0 0x30000000 0 0x08000000>,
+                      <0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
+             dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x40000000>,
+                          <0x42000000 2 0x00000000 2 0x00000000 0 0x40000000>;
+             interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>,
+                          <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>,
+                          <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH>;
+             #interrupt-cells = <1>;
+             interrupt-map-mask = <0 0 0 0>;
+             interrupt-map = <0 0 0 0 &gic GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
+             clocks = <&cpg CPG_MOD 319>, <&pcie_bus_clk>;
+             clock-names = "pcie", "pcie_bus";
+             power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+             resets = <&cpg 319>;
+         };
+    };