Document the Rocktech 5" 480x854 panel based on the Ilitek ILI9806E
controller.

This panel uses SPI for control and an RGB interface for display
data, so adjust the binding requirements accordingly.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

(no changes since v3)

Changes in v3:
- Add Reviewed-by tag of Rob Herring

Changes in v2:
- Restore vdd-supply as required for both DSI and SPI types
- Dop useless settings in case of rocktech,rk050hr345-ct106a

 .../display/panel/ilitek,ili9806e.yaml        | 38 ++++++++++++++++++-
 1 file changed, 36 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
index f80307579485..2080d9e0ffac 100644
--- a/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
+++ b/Documentation/devicetree/bindings/display/panel/ilitek,ili9806e.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/display/panel/ilitek,ili9806e.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Ilitek ILI9806E based MIPI-DSI panels
+title: Ilitek ILI9806E based panels
 
 maintainers:
   - Michael Walle <mwalle@kernel.org>
@@ -18,6 +18,7 @@ properties:
       - enum:
           - densitron,dmt028vghmcmi-1d
           - ortustech,com35h3p70ulc
+          - rocktech,rk050hr345-ct106a
       - const: ilitek,ili9806e
 
   reg:
@@ -30,11 +31,24 @@ required:
   - compatible
   - reg
   - vdd-supply
-  - vccio-supply
   - reset-gpios
   - backlight
   - port
 
+if:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - rocktech,rk050hr345-ct106a
+then:
+  $ref: /schemas/spi/spi-peripheral-props.yaml#
+  required:
+    - spi-max-frequency
+else:
+  required:
+    - vccio-supply
+
 unevaluatedProperties: false
 
 examples:
@@ -60,5 +74,25 @@ examples:
             };
         };
     };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
 
+        panel@0 {
+            compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e";
+            reg = <0>;
+            vdd-supply = <&reg_vdd_panel>;
+            spi-max-frequency = <10000000>;
+            reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>;
+            backlight = <&backlight>;
+            port {
+                panel_in_rgb: endpoint {
+                    remote-endpoint = <&ltdc_out_rgb>;
+                };
+            };
+        };
+    };
 ...
-- 
2.43.0