[PATCH v3 6/8] arm64: dts: renesas: Add EK874 board with idk-2121wr display support

[Fabrizio Castro]

The EK874 is advertised as compatible with panel IDK-2121WR from
Advantech, however the panel isn't sold alongside the board.
A new dts, adding everything that's required to get the panel to
to work with the EK874, is the most convenient way to support the
EK874 when it's connected to the IDK-2121WR.

Signed-off-by: Fabrizio Castro <fabrizio.castro@xxxxxxxxxxxxxx>

---
v1->v2:
* Added comment for lvds-connector-en-gpio
* Renamed &lvds0_panel_in to panel_in0
* Renamed &lvds1_panel_in to panel_in1

v2->v3:
* removed renesas,swap-data property
* added dual-lvds-odd-pixels and dual-lvds-even-pixels properties

Geert,

no need to review this patch unless they like the idea behind this
series.

Thanks,
Fab

---
 arch/arm64/boot/dts/renesas/Makefile               |   3 +-
 .../boot/dts/renesas/r8a774c0-ek874-idk-2121wr.dts | 116 +++++++++++++++++++++
 2 files changed, 118 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/boot/dts/renesas/r8a774c0-ek874-idk-2121wr.dts

diff --git a/arch/arm64/boot/dts/renesas/Makefile b/arch/arm64/boot/dts/renesas/Makefile
index 42b74c2..ce48478 100644
--- a/arch/arm64/boot/dts/renesas/Makefile
+++ b/arch/arm64/boot/dts/renesas/Makefile
@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_ARCH_R8A774A1) += r8a774a1-hihope-rzg2m.dtb
 dtb-$(CONFIG_ARCH_R8A774A1) += r8a774a1-hihope-rzg2m-ex.dtb
-dtb-$(CONFIG_ARCH_R8A774C0) += r8a774c0-cat874.dtb r8a774c0-ek874.dtb
+dtb-$(CONFIG_ARCH_R8A774C0) += r8a774c0-cat874.dtb r8a774c0-ek874.dtb \
+			       r8a774c0-ek874-idk-2121wr.dtb
 dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-salvator-x.dtb r8a7795-h3ulcb.dtb
 dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-h3ulcb-kf.dtb
 dtb-$(CONFIG_ARCH_R8A7795) += r8a7795-salvator-xs.dtb
diff --git a/arch/arm64/boot/dts/renesas/r8a774c0-ek874-idk-2121wr.dts b/arch/arm64/boot/dts/renesas/r8a774c0-ek874-idk-2121wr.dts
new file mode 100644
index 0000000..a7b27d0
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/r8a774c0-ek874-idk-2121wr.dts
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the Silicon Linux RZ/G2E evaluation kit (EK874),
+ * connected to an Advantech IDK-2121WR 21.5" LVDS panel
+ *
+ * Copyright (C) 2019 Renesas Electronics Corp.
+ */
+
+#include "r8a774c0-ek874.dts"
+
+/ {
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm5 0 50000>;
+
+		brightness-levels = <0 4 8 16 32 64 128 255>;
+		default-brightness-level = <6>;
+
+		power-supply = <&reg_12p0v>;
+		enable-gpios = <&gpio6 12 GPIO_ACTIVE_HIGH>;
+	};
+
+	panel-lvds {
+		compatible = "advantech,idk-2121wr", "panel-lvds";
+
+		width-mm = <476>;
+		height-mm = <268>;
+
+		data-mapping = "vesa-24";
+
+		panel-timing {
+			clock-frequency = <148500000>;
+			hactive = <1920>;
+			vactive = <1080>;
+			hsync-len = <44>;
+			hfront-porch = <88>;
+			hback-porch = <148>;
+			vfront-porch = <4>;
+			vback-porch = <36>;
+			vsync-len = <5>;
+		};
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				dual-lvds-odd-pixels;
+				panel_in0: endpoint {
+					remote-endpoint = <&lvds0_out>;
+				};
+			};
+
+			port@1 {
+				reg = <1>;
+				dual-lvds-even-pixels;
+				panel_in1: endpoint {
+					remote-endpoint = <&lvds1_out>;
+				};
+			};
+		};
+	};
+};
+
+&gpio0 {
+	/*
+	 * When GP0_17 is low LVDS[01] are connected to the LVDS connector
+	 * When GP0_17 is high LVDS[01] are connected to the LT8918L
+	 */
+	lvds-connector-en-gpio{
+		gpio-hog;
+		gpios = <17 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "lvds-connector-en-gpio";
+	};
+};
+
+&lvds0 {
+	ports {
+		port@1 {
+			lvds0_out: endpoint {
+				remote-endpoint = <&panel_in0>;
+			};
+		};
+	};
+};
+
+&lvds1 {
+	status = "okay";
+
+	clocks = <&cpg CPG_MOD 727>, <&x13_clk>, <&extal_clk>;
+	clock-names = "fck", "dclkin.0", "extal";
+
+	ports {
+		port@1 {
+			lvds1_out: endpoint {
+				remote-endpoint = <&panel_in1>;
+			};
+		};
+	};
+};
+
+&pfc {
+	pwm5_pins: pwm5 {
+		groups = "pwm5_a";
+		function = "pwm5";
+	};
+};
+
+&pwm5 {
+	pinctrl-0 = <&pwm5_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
-- 
2.7.4