[PATCH v4 1/5] dt-bindings: media: add i.MX parallel CPI support

[Frank Li <Frank.Li@nxp.com>]

From: Alice Yuan <alice.yuan@nxp.com>

Document the binding for parallel CPI controller found in i.MX8QXP, i.MX93
and i.MX91 SoCs.

Signed-off-by: Alice Yuan <alice.yuan@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
Chagnes in v4
- add Laurent Pinchart's review by tag
- fix $ref: /schemas/graph.yaml#/$defs/port-base, original is
$ref: /schemas/graph.yaml#/properties/port-base

Change in v3:
- use enum at compatible string
- add ref to video-interfaces.yaml#
- use cpi as node name in examples.
- replace csi (Camera Serial Interface) with CPI (Camera Parallel Interface)
in commit message.

Change in v2:
- use pcif surfix as Laurent Pinchart's suggest.
- put power-domains into required list
---
 .../devicetree/bindings/media/fsl,imx93-pcif.yaml  | 126 +++++++++++++++++++++
 MAINTAINERS                                        |   1 +
 2 files changed, 127 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml b/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..9dd0331f6ef7503f343eb576fe6878e32d91c182
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/fsl,imx93-pcif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX8/9 Parallel Camera Interface
+
+maintainers:
+  - Frank Li <Frank.Li@nxp.com>
+
+description: |
+  This is device node for the Parallel Camera Interface which enables the
+  chip to connect directly to external Parallel CMOS image sensors.
+  Supports up to 80MHz input clock from sensor.
+  Supports the following input data formats
+    - 8-bit/10-bit Camera Sensor Interface (CSI)
+    - 8-bit data port for RGB, YCbCr, and YUV data input
+    - 8-bit/10-bit data ports for Bayer data input
+  Parallel Camera Interface is hooked to the Imaging subsystem via the
+  Pixel Link.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,imx8qxp-pcif
+          - fsl,imx93-pcif
+      - items:
+          - enum:
+              - fsl,imx91-pcif
+          - const: fsl,imx93-pcif
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: pixel
+      - const: ipg
+
+  power-domains:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: Input port node.
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              bus-type:
+                const: 5
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: Output port node.
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              bus-type:
+                const: 5
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - power-domains
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx93-clock.h>
+    #include <dt-bindings/power/fsl,imx93-power.h>
+
+    cpi@4ac10070 {
+        compatible = "fsl,imx93-pcif";
+        reg = <0x4ac10070 0x10>;
+        clocks = <&clk IMX93_CLK_MIPI_CSI_GATE>,
+                 <&clk IMX93_CLK_MEDIA_APB>;
+        clock-names = "pixel", "ipg";
+        assigned-clocks = <&clk IMX93_CLK_CAM_PIX>;
+        assigned-clock-parents = <&clk IMX93_CLK_VIDEO_PLL>;
+        assigned-clock-rates = <140000000>;
+        power-domains = <&media_blk_ctrl IMX93_MEDIABLK_PD_MIPI_CSI>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+
+                endpoint {
+                    remote-endpoint = <&mt9m114_ep>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+                endpoint {
+                    remote-endpoint = <&isi_in>;
+                };
+            };
+        };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 4df15c09cca08924b503753646487a116bc6be98..4eb0d0de16299a3bcd5c2f6f6445e416c8fa0a48 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15235,6 +15235,7 @@ L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media.git
 F:	Documentation/admin-guide/media/imx7.rst
+F:	Documentation/devicetree/bindings/media/fsl,imx93-pcif.yaml
 F:	Documentation/devicetree/bindings/media/nxp,imx-mipi-csi2.yaml
 F:	Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
 F:	Documentation/devicetree/bindings/media/nxp,imx8mq-mipi-csi2.yaml

-- 
2.34.1