[PATCH 1/4] media: dt-bindings: media: Document RZ/G2L CSI-2 block

[Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>]

Document the CSI-2 block which is part of CRU found in Renesas
RZ/G2L SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
RFC v2 -> v1
* Fixed review comments pointed by Rob and Jacopo.

RFC v1 -> RFC v2
* New patch
---
 .../bindings/media/renesas,rzg2l-csi2.yaml    | 149 ++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml

diff --git a/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
new file mode 100644
index 000000000000..f82f88c096df
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
@@ -0,0 +1,149 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) 2022 Renesas Electronics Corp.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/renesas,rzg2l-csi2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/G2L (and alike SoC's) MIPI CSI-2 receiver
+
+maintainers:
+  - Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
+
+description:
+  The CSI-2 receiver device provides MIPI CSI-2 capabilities for the Renesas RZ/G2L
+  (and alike SoCs). MIPI CSI-2 is part of the CRU block which is used in conjunction
+  with the Image Processing module, which provides the video capture capabilities.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - renesas,r9a07g044-csi2       # RZ/G2{L,LC}
+              - renesas,r9a07g054-csi2       # RZ/V2L
+          - const: renesas,rzg2l-csi2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    const: csi2_link
+
+  clocks:
+    items:
+      - description: Internal clock for connecting CRU and MIPI
+      - description: CRU Main clock
+      - description: CPU Register access clock
+
+  clock-names:
+    items:
+      - const: sysclk
+      - const: vclk
+      - const: pclk
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    items:
+      - description: CRU_CMN_RSTB reset terminal
+
+  reset-names:
+    const: cmn-rstb
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description:
+          Input port node, single endpoint describing the CSI-2 transmitter.
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+                items:
+                  maximum: 4
+
+            required:
+              - clock-lanes
+              - data-lanes
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          Output port node, Image Processing block connected to the CSI-2 receiver.
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - power-domains
+  - resets
+  - reset-names
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r9a07g044-cpg.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    csi20: csi2@10830400 {
+            compatible = "renesas,r9a07g044-csi2", "renesas,rzg2l-csi2";
+            reg = <0x10830400 0xfc00>;
+            interrupts = <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cpg CPG_MOD R9A07G044_CRU_SYSCLK>,
+                     <&cpg CPG_MOD R9A07G044_CRU_VCLK>,
+                     <&cpg CPG_MOD R9A07G044_CRU_PCLK>;
+            clock-names = "sysclk", "vclk", "pclk";
+            power-domains = <&cpg>;
+            resets = <&cpg R9A07G044_CRU_CMN_RSTB>;
+            reset-names = "cmn-rstb";
+
+            ports {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    port@0 {
+                            reg = <0>;
+
+                            csi2_in: endpoint {
+                                    clock-lanes = <0>;
+                                    data-lanes = <1 2>;
+                                    remote-endpoint = <&ov5645_ep>;
+                            };
+                    };
+
+                    port@1 {
+                            #address-cells = <1>;
+                            #size-cells = <0>;
+
+                            reg = <1>;
+
+                            csi2cru: endpoint@0 {
+                                    reg = <0>;
+                                    remote-endpoint = <&crucsi2>;
+                            };
+                    };
+            };
+    };
-- 
2.25.1