board: rockchip: Add support for Powkiddy RGB10MAX3

Add support to the RGxx3 device for the Powkiddy RGB10MAX3. This device
is extremely similar to all the other devices and can use the same
bootloader with the same detection logic.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

arch/arm/dts/rk3566-anbernic-rgxx3.dts

@@ -12,9 +12,12 @@
  * set the correct dtb name for loading mainline Linux automatically.
  */
 	model = "RGXX3";
-	compatible = "anbernic,rg353m", "anbernic,rg353p",
-		     "anbernic,rg353v", "anbernic,rg353vs",
-		     "anbernic,rg503", "rockchip,rk3566";
+	compatible = "anbernic,rg-arc-d", "anbernic,rg-arc-s",
+		     "anbernic,rg353m", "anbernic,rg353p",
+		     "anbernic,rg353ps", "anbernic,rg353v",
+		     "anbernic,rg353vs", "anbernic,rg503",
+		     "powkiddy,rgb10max3", "powkiddy,rgb30",
+		     "powkiddy,rk2023", "rockchip,rk3566";
 };
 
 &cru {

board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c

@@ -50,6 +50,7 @@ enum rgxx3_device_id {
 	RGB30,
 	RK2023,
 	RGARCD,
+	RGB10MAX3,
 	/* Devices with duplicate ADC value */
 	RG353PS,
 	RG353VS,
@@ -107,6 +108,13 @@ static const struct rg3xx_model rg3xx_model_details[] = {
 		.fdtfile = DTB_DIR "rk3566-anbernic-rg-arc-d.dtb",
 		.detect_panel = 0,
 	},
+	[RGB10MAX3] = {
+		.adc_value = 765, /* Observed average from device */
+		.board = "rk3566-powkiddy-rgb10max3",
+		.board_name = "Powkiddy RGB10MAX3",
+		.fdtfile = DTB_DIR "rk3566-powkiddy-rgb10max3.dtb",
+		.detect_panel = 0,
+	},
 	/* Devices with duplicate ADC value */
 	[RG353PS] = {
 		.adc_value = 860, /* Observed average from device */

doc/board/anbernic/rgxx3.rst

@@ -17,6 +17,7 @@ This allows U-Boot to boot the following Anbernic devices:
 Additionally, the following very similar non-Anbernic devices are also
 supported:
 
+ - Powkiddy RGB10MAX3
  - Powkiddy RGB30
  - Powkiddy RK2023