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Date:   Sat, 16 May 2020 23:50:46 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>
Cc:     od@...c.me, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 01/12] dt-bindings: display: Convert ingenic,lcd.txt to YAML

Convert the ingenic,lcd.txt to a new ingenic,lcd.yaml file.

In the process, the new ingenic,jz4780-lcd compatible string has been
added.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---

Notes:
    This patch comes from a different patchset so it's effectively a V2.
    
    Changes were:
    - lcd_pclk and lcd clocks are in the correct order now,
    - Add 'port' and 'ports' properties, and document the valid ports.

 .../bindings/display/ingenic,lcd.txt          |  45 -------
 .../bindings/display/ingenic,lcd.yaml         | 126 ++++++++++++++++++
 2 files changed, 126 insertions(+), 45 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/display/ingenic,lcd.txt
 create mode 100644 Documentation/devicetree/bindings/display/ingenic,lcd.yaml

diff --git a/Documentation/devicetree/bindings/display/ingenic,lcd.txt b/Documentation/devicetree/bindings/display/ingenic,lcd.txt
deleted file mode 100644
index 01e3261defb6..000000000000
--- a/Documentation/devicetree/bindings/display/ingenic,lcd.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-Ingenic JZ47xx LCD driver
-
-Required properties:
-- compatible: one of:
-  * ingenic,jz4740-lcd
-  * ingenic,jz4725b-lcd
-  * ingenic,jz4770-lcd
-- reg: LCD registers location and length
-- clocks: LCD pixclock and device clock specifiers.
-	   The device clock is only required on the JZ4740.
-- clock-names: "lcd_pclk" and "lcd"
-- interrupts: Specifies the interrupt line the LCD controller is connected to.
-
-Example:
-
-panel {
-	compatible = "sharp,ls020b1dd01d";
-
-	backlight = <&backlight>;
-	power-supply = <&vcc>;
-
-	port {
-		panel_input: endpoint {
-			remote-endpoint = <&panel_output>;
-		};
-	};
-};
-
-
-lcd: lcd-controller@...50000 {
-	compatible = "ingenic,jz4725b-lcd";
-	reg = <0x13050000 0x1000>;
-
-	interrupt-parent = <&intc>;
-	interrupts = <31>;
-
-	clocks = <&cgu JZ4725B_CLK_LCD>;
-	clock-names = "lcd";
-
-	port {
-		panel_output: endpoint {
-			remote-endpoint = <&panel_input>;
-		};
-	};
-};
diff --git a/Documentation/devicetree/bindings/display/ingenic,lcd.yaml b/Documentation/devicetree/bindings/display/ingenic,lcd.yaml
new file mode 100644
index 000000000000..d56db1802fad
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/ingenic,lcd.yaml
@@ -0,0 +1,126 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/ingenic,lcd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ingenic SoCs LCD controller devicetree bindings
+
+maintainers:
+  - Paul Cercueil <paul@...pouillou.net>
+
+properties:
+  $nodename:
+    pattern: "^lcd-controller@[0-9a-f]+$"
+
+  compatible:
+    enum:
+      - ingenic,jz4740-lcd
+      - ingenic,jz4725b-lcd
+      - ingenic,jz4770-lcd
+      - ingenic,jz4780-lcd
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Pixel clock
+      - description: Module clock
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: lcd_pclk
+      - const: lcd
+    minItems: 1
+
+  port:
+    description: OF graph bindings (specified in bindings/graph.txt).
+
+  ports:
+    description: OF graph bindings (specified in bindings/graph.txt).
+    type: object
+    properties:
+      port@0:
+        type: object
+        description: DPI output, to interface with TFT panels.
+
+      port@8:
+        type: object
+        description: Link to the Image Processing Unit (IPU).
+          (See ingenic,ipu.yaml).
+
+    required:
+      - port@0
+
+required:
+    - compatible
+    - reg
+    - interrupts
+    - clocks
+    - clock-names
+
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - ingenic,jz4740-lcd
+          - ingenic,jz4780-lcd
+then:
+  properties:
+    clocks:
+      minItems: 2
+    clock-names:
+      minItems: 2
+else:
+  properties:
+    clocks:
+      maxItems: 1
+    clock-names:
+      maxItems: 1
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/jz4740-cgu.h>
+    lcd-controller@...50000 {
+      compatible = "ingenic,jz4740-lcd";
+      reg = <0x13050000 0x1000>;
+
+      interrupt-parent = <&intc>;
+      interrupts = <30>;
+
+      clocks = <&cgu JZ4740_CLK_LCD_PCLK>, <&cgu JZ4740_CLK_LCD>;
+      clock-names = "lcd_pclk", "lcd";
+
+      port {
+        endpoint {
+          remote-endpoint = <&panel_input>;
+        };
+      };
+    };
+
+  - |
+    #include <dt-bindings/clock/jz4725b-cgu.h>
+    lcd-controller@...50000 {
+      compatible = "ingenic,jz4725b-lcd";
+      reg = <0x13050000 0x1000>;
+
+      interrupt-parent = <&intc>;
+      interrupts = <31>;
+
+      clocks = <&cgu JZ4725B_CLK_LCD>;
+      clock-names = "lcd_pclk";
+
+      port {
+        endpoint {
+          remote-endpoint = <&panel_input>;
+        };
+      };
+    };
-- 
2.26.2

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