[PATCH 4/5] arm64: dts: freescale: imx8mp-toradex-smarc: Add Toradex Capacitive Touch Display 10.1" LVDS

[Ernest Van Hoecke]

From: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>

Add a device tree overlay for the Toradex Capacitive Touch Display
10.1" on the Toradex SMARC Development Board LVDS0 interface. The panel
is a LogicTechno LT170410-2WHC 10.1" WXGA IPS LCD and the touch input is
provided by an Atmel maXTouch capacitive touch controller.

The overlay is also combined with the SMARC Development Board device
tree to provide a ready-to-use DTB.

Link: https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
Signed-off-by: Ernest Van Hoecke <ernest.vanhoecke@xxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/Makefile             |  4 ++
 ...-toradex-smarc-panel-cap-touch-10inch-lvds.dtso | 80 ++++++++++++++++++++++
 2 files changed, 84 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index df697066e89c..2ec50811ee1a 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -712,8 +712,10 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-skov-revc-jutouch-jt101tm023.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-adapter-panel-cap-touch-10inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-10inch-dsi.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-dsi-to-hdmi.dtb
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev-panel-cap-touch-10inch-lvds.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dev.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-dsi-to-hdmi.dtbo
+dtb-$(CONFIG_ARCH_MXC) += imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtbo
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mpxl.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpql-mba8mp-ras314.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2.dtb
@@ -721,6 +723,8 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-tqma8mpqs-mb-smarc-2.dtb
 imx8mp-toradex-smarc-dev-adapter-panel-cap-touch-10inch-dsi-dtbs := imx8mp-toradex-smarc-dev.dtb \
 	imx8mp-toradex-smarc-adapter-panel-cap-touch-10inch-dsi.dtbo
 imx8mp-toradex-smarc-dev-dsi-to-hdmi-dtbs := imx8mp-toradex-smarc-dev.dtb imx8mp-toradex-smarc-dsi-to-hdmi.dtbo
+imx8mp-toradex-smarc-dev-panel-cap-touch-10inch-lvds-dtbs := imx8mp-toradex-smarc-dev.dtb \
+	imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtbo
 
 imx8mp-tx8p-ml81-moduline-display-106-av101hdt-a10-dtbs += imx8mp-tx8p-ml81-moduline-display-106.dtb \
 	imx8mp-tx8p-ml81-moduline-display-106-av101hdt-a10.dtbo
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtso b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtso
new file mode 100644
index 000000000000..a177cf61cc38
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-panel-cap-touch-10inch-lvds.dtso
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Toradex Capacitive Touch Display 10.1" connected via Toradex SMARC
+ * Development Board LVDS0. Connect the panel to J48 and the touch
+ * controller to J49.
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-lvds
+ * https://www.toradex.com/accessories/capacitive-touch-display-10.1-inch-lvds
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/imx8mp-clock.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+&{/} {
+	backlight_lcd0: backlight-lcd0 {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 45 63 88 119 158 203 255>;
+		default-brightness-level = <4>;
+		/* SMARC LCD0_BKLT_EN (SMARC S127) */
+		enable-gpios = <&som_gpio_expander 5 GPIO_ACTIVE_HIGH>;
+		/* SMARC LCD0_BKLT_PWM (SMARC S141) */
+		pwms = <&pwm2 0 6666667 PWM_POLARITY_INVERTED>;
+	};
+
+	panel-lvds-native {
+		compatible = "logictechno,lt170410-2whc";
+		backlight = <&backlight_lcd0>;
+		power-supply = <&reg_carrier_3p3v>;
+
+		port {
+			panel_lvds_native_in: endpoint {
+				remote-endpoint = <&ldb_lvds_ch0>;
+			};
+		};
+	};
+};
+
+/* SMARC I2C_LCD */
+&i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	touchscreen@4a {
+		compatible = "atmel,maxtouch";
+		reg = <0x4a>;
+		/* SMARC GPIO6 (SMARC P114) - LVDS_TOUCH_INT# */
+		interrupt-parent = <&gpio4>;
+		interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
+		/* SMARC GPIO4 (SMARC P112) - LVDS_RST# */
+		reset-gpios = <&gpio4 18 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&lcdif2 {
+	status = "okay";
+};
+
+&ldb_lvds_ch0 {
+	remote-endpoint = <&panel_lvds_native_in>;
+};
+
+&lvds_bridge {
+	assigned-clocks = <&clk IMX8MP_CLK_MEDIA_LDB>,
+			  <&clk IMX8MP_VIDEO_PLL1>;
+	/*
+	 * This display uses 71.1 MHz pixel clock, so IMX8MP_VIDEO_PLL1 needs
+	 * to be 7 times 71.1 MHz, or 497.7 MHz as the internal divider will
+	 * always divide the output LVDS clock by 7.
+	 */
+	assigned-clock-rates = <0>, <497700000>;
+
+	status = "okay";
+};

-- 
2.43.0