toradex-smarc-imx8mp: panel-cap-touch-10inch-lvds: add overlay

Add overlay for Capacitive Touch LVDS 10' display for Toradex SMARC
iMX8MP using the upstream kernel.

Related-to: ELB-6417
Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>

2 files changed, 114 insertions, 0 deletions

diff --git a/overlays/Makefile b/overlays/Makefile
index 3a59f31..0f22470 100644
--- a/overlays/Makefile
+++ b/overlays/Makefile
@@ -56,6 +56,7 @@ dtb-y += colibri-imx7_spidev_overlay.dtbo
 dtb-y += colibri-imx7_vga-640x480_overlay.dtbo
 dtb-y += colibri-imx8x_hmp_overlay.dtbo
 dtb-y += toradex-smarc-imx8mp_dsi-to-hdmi_overlay.dtbo
+dtb-y += toradex-smarc-imx8mp_panel-cap-touch-10inch-lvds_overlay.dtbo
 dtb-y += toradex-smarc-imx8mp_spi0-cs0_spidev_overlay.dtbo
 dtb-y += toradex-smarc-imx8mp_spi0-cs1_spidev_overlay.dtbo
 dtb-y += toradex-smarc-imx8mp_spi1-cs0_spidev_overlay.dtbo
diff --git a/overlays/toradex-smarc-imx8mp_panel-cap-touch-10inch-lvds_overlay.dts b/overlays/toradex-smarc-imx8mp_panel-cap-touch-10inch-lvds_overlay.dts
new file mode 100644
index 0000000..a5d6db0
--- /dev/null
+++ b/overlays/toradex-smarc-imx8mp_panel-cap-touch-10inch-lvds_overlay.dts
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright 2025 Toradex
+ *
+ * Capacitive Touch Display 10.1" LVDS
+ *
+ * https://developer.toradex.com/hardware/accessories/displays/capacitive-touch-display-101inch-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>
+
+/ {
+	compatible = "toradex,smarc-imx8mp";
+};
+
+&{/} {
+	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 */
+		enable-gpios = <&som_gpio_expander 5 GPIO_ACTIVE_HIGH>;
+		/* SMARC LCD0_BKLT_PWM */
+		pwms = <&pwm2 0 6666667 PWM_POLARITY_INVERTED>;
+	};
+
+	panel-lvds0 {
+		compatible = "panel-lvds";
+		backlight = <&backlight_lcd0>;
+		data-mapping = "vesa-24";
+		height-mm = <136>;
+		width-mm = <217>;
+
+		panel-timing {
+			clock-frequency = <68900000 71100000 73400000>;
+			de-active = <1>;
+			hactive = <1280 1280 1280>;
+			hback-porch = <23 60 71>;
+			hfront-porch = <23 60 71>;
+			hsync-active = <0>;
+			hsync-len = <15 40 47>;
+			pixelclk-active = <1>;
+			vactive = <800 800 800>;
+			vback-porch = <5 7 10>;
+			vfront-porch = <5 7 10>;
+			vsync-active = <0>;
+			vsync-len = <6 9 12>;
+		};
+
+		port {
+			panel_lvds0_in: endpoint {
+				remote-endpoint = <&ldb_lvds_ch0>;
+			};
+		};
+	};
+};
+
+/* SMARC I2C_LCD */
+&i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	touch@4a {
+		compatible = "atmel,maxtouch";
+		reg = <0x4a>;
+		/* SMARC GPIO06 */
+		interrupt-parent = <&gpio4>;
+		interrupts = <29 IRQ_TYPE_EDGE_FALLING>;
+		/* SMARC GPIO04 */
+		reset-gpios = <&gpio4 18 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&lcdif2 {
+	status = "okay";
+};
+
+&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 71.1MHz, or 497.7 MHz as the internal divider will
+	 * always divide the output LVDS clock by 7.
+         */
+	assigned-clock-rates = <0>, <497700000>;
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@1 {
+			reg = <1>;
+
+			ldb_lvds_ch0: endpoint {
+				remote-endpoint = <&panel_lvds0_in>;
+			};
+		};
+	};
+};
+
+/* SMARC LCD0_BKLT_PWM */
+&pwm2 {
+	status = "okay";
+};