[PATCH] dt-bindings: display: atmel,lcdc: convert to dtschema

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Convert the atmel,lcdc bindings to DT schema.
Changes during conversion: add missing clocks and clock-names properties.

Signed-off-by: Dharma Balasubiramani <dharma.b@xxxxxxxxxxxxx>
---
 .../devicetree/bindings/display/atmel,lcdc.txt     |  87 --------------
 .../devicetree/bindings/display/atmel,lcdc.yaml    | 133 +++++++++++++++++++++
 2 files changed, 133 insertions(+), 87 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/atmel,lcdc.txt b/Documentation/devicetree/bindings/display/atmel,lcdc.txt
deleted file mode 100644
index b5e355ada2fa..000000000000
--- a/Documentation/devicetree/bindings/display/atmel,lcdc.txt
+++ /dev/null
@@ -1,87 +0,0 @@
-Atmel LCDC Framebuffer
------------------------------------------------------
-
-Required properties:
-- compatible :
-	"atmel,at91sam9261-lcdc" , 
-	"atmel,at91sam9263-lcdc" ,
-	"atmel,at91sam9g10-lcdc" ,
-	"atmel,at91sam9g45-lcdc" ,
-	"atmel,at91sam9g45es-lcdc" ,
-	"atmel,at91sam9rl-lcdc" ,
-- reg : Should contain 1 register ranges(address and length).
-	Can contain an additional register range(address and length)
-	for fixed framebuffer memory. Useful for dedicated memories.
-- interrupts : framebuffer controller interrupt
-- display: a phandle pointing to the display node
-
-Required nodes:
-- display: a display node is required to initialize the lcd panel
-	This should be in the board dts.
-- default-mode: a videomode within the display with timing parameters
-	as specified below.
-
-Optional properties:
-- lcd-supply: Regulator for LCD supply voltage.
-
-Example:
-
-	fb0: fb@00500000 {
-		compatible = "atmel,at91sam9g45-lcdc";
-		reg = <0x00500000 0x1000>;
-		interrupts = <23 3 0>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pinctrl_fb>;
-		display = <&display0>;
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-	};
-
-Example for fixed framebuffer memory:
-
-	fb0: fb@00500000 {
-		compatible = "atmel,at91sam9263-lcdc";
-		reg = <0x00700000 0x1000 0x70000000 0x200000>;
-		[...]
-	};
-
-Atmel LCDC Display
------------------------------------------------------
-Required properties (as per of_videomode_helper):
-
- - atmel,dmacon: dma controller configuration
- - atmel,lcdcon2: lcd controller configuration
- - atmel,guard-time: lcd guard time (Delay in frame periods)
- - bits-per-pixel: lcd panel bit-depth.
-
-Optional properties (as per of_videomode_helper):
- - atmel,lcdcon-backlight: enable backlight
- - atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
- - atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
- - atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
-
-Example:
-	display0: display {
-		bits-per-pixel = <32>;
-		atmel,lcdcon-backlight;
-		atmel,dmacon = <0x1>;
-		atmel,lcdcon2 = <0x80008002>;
-		atmel,guard-time = <9>;
-		atmel,lcd-wiring-mode = <1>;
-
-		display-timings {
-			native-mode = <&timing0>;
-			timing0: timing0 {
-				clock-frequency = <9000000>;
-				hactive = <480>;
-				vactive = <272>;
-				hback-porch = <1>;
-				hfront-porch = <1>;
-				vback-porch = <40>;
-				vfront-porch = <1>;
-				hsync-len = <45>;
-				vsync-len = <1>;
-			};
-		};
-	};
diff --git a/Documentation/devicetree/bindings/display/atmel,lcdc.yaml b/Documentation/devicetree/bindings/display/atmel,lcdc.yaml
new file mode 100644
index 000000000000..4a1de5a8d64b
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/atmel,lcdc.yaml
@@ -0,0 +1,133 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/atmel,lcdc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip's LCDC Framebuffer
+
+maintainers:
+  - Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
+  - Dharma Balasubiramani <dharma.b@xxxxxxxxxxxxx>
+
+description:
+  The LCDC works with a framebuffer, which is a section of memory that contains
+  a complete frame of data representing pixel values for the display. The LCDC
+  reads the pixel data from the framebuffer and sends it to the LCD panel to
+  render the image.
+
+properties:
+  compatible:
+    enum:
+      - atmel,at91sam9261-lcdc 
+      - atmel,at91sam9263-lcdc
+      - atmel,at91sam9g10-lcdc
+      - atmel,at91sam9g45-lcdc
+      - atmel,at91sam9g45es-lcdc
+      - atmel,at91sam9rl-lcdc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks: 
+    maxItems: 2
+ 
+  clock-names:
+    items:
+      - const: hclk
+      - const: lcdc_clk
+
+  display:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: A phandle pointing to the display node.
+
+    properties:
+      atmel,dmacon:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: dma controller configuration
+
+      atmel,lcdcon2:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: lcd controller configuration
+
+      atmel,guard-time:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: lcd guard time (Delay in frame periods)
+
+      bits-per-pixel:
+        $ref: /schemas/types.yaml#/definitions/uint32
+        description: lcd panel bit-depth.
+
+      atmel,lcdcon-backlight: 
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: enable backlight
+
+      atmel,lcdcon-backlight-inverted:
+        $ref: /schemas/types.yaml#/definitions/flag
+        description: invert backlight PWM polarity
+
+      atmel,lcd-wiring-mode:
+        $ref: /schemas/types.yaml#/definitions/non-unique-string-array
+        description: lcd wiring mode "RGB" or "BRG"
+
+      atmel,power-control-gpio:
+        description: gpio to power on or off the LCD (as many as needed)
+
+    required:
+      - atmel,dmacon
+      - atmel,lcdcon2
+      - atmel,guard-time
+      - bits-per-pixel 
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - display
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/at91.h>
+    fb@500000 {
+      compatible = "atmel,at91sam9g45-lcdc";
+      reg = <0x00500000 0x1000>;
+      interrupts = <23 3 0>;
+      pinctrl-names = "default";
+      pinctrl-0 = <&pinctrl_fb>;
+      clocks = <&pmc PMC_TYPE_PERIPHERAL 23>, <&pmc PMC_TYPE_PERIPHERAL 23>;
+      clock-names = "hclk", "lcdc_clk";
+      display = <&display0>;
+    };
+
+    display {
+      bits-per-pixel = <32>;
+      atmel,lcdcon-backlight;
+      atmel,dmacon = <0x1>;
+      atmel,lcdcon2 = <0x80008002>;
+      atmel,guard-time = <9>;
+      atmel,lcd-wiring-mode = <1>;
+      
+      display-timings {
+        native-mode = <&timing0>;
+        timing0: timing0 {
+          clock-frequency = <9000000>;
+          hactive = <480>;
+          vactive = <272>;
+          hback-porch = <1>;
+          hfront-porch = <1>;
+          vback-porch = <40>;
+          vfront-porch = <1>;
+          hsync-len = <45>;
+          vsync-len = <1>;
+        };
+      };
+    };

---
base-commit: ffd2cb6b718e189e7e2d5d0c19c25611f92e061a
change-id: 20240223-lcdc-fb-b8d2e2f3c914

Best regards,
-- 
Dharma Balasubiramani <dharma.b@xxxxxxxxxxxxx>





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