ARM: dts: apalis-imx8: Add support for 10.1" LVDS displayApalis-iMX8_Console-Image_3.0b1.40-20190612

This adds support for the Toradex Capacitive Touch Display 10.1" LVDS.
The patch adds the display as well set the correct pwm frequency for
backlight dimming and some sensible values for backlight-pwm.

It also adds the Atmel Maxtouch device on the standard pins.

Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>

1 files changed, 38 insertions, 35 deletions

diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8qm-apalis.dts b/arch/arm64/boot/dts/freescale/fsl-imx8qm-apalis.dts
index 7e3d1403c274..59a5f2dc7650 100644
--- a/arch/arm64/boot/dts/freescale/fsl-imx8qm-apalis.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8qm-apalis.dts
@@ -26,10 +26,10 @@
 		compatible = "pwm-backlight";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_bkl_on>;
-		brightness-levels = <0 4 8 16 32 64 128 255>;
-		default-brightness-level = <6>;
+		brightness-levels = <255 226 215 194 162 120 66 0>;
+		default-brightness-level = <7>;
 		enable-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>; /* Apalis BKL1_ON */
-		pwms = <&lvds1_pwm 0 100000 0>;
+		pwms = <&lvds1_pwm 0 5000000 0>;
 		status = "okay";
 	};
 
@@ -174,6 +174,17 @@
                          node below to use the touchscreen */
 		status = "disabled";
 	};
+
+	lvds1_panel {
+		compatible = "toradex,captouch-101-lvds";
+		backlight = <&backlight>;
+
+		port {
+			panel_lvds1_in: endpoint {
+				remote-endpoint = <&lvds1_out>;
+			};
+		};
+	};
 };
 
 &acm {
@@ -394,6 +405,17 @@
 		compatible = "st,m41t0";
 		reg = <0x68>;
 	};
+
+	atmel_mxt_ts: atmel_mxt_ts@4a {
+		compatible = "atmel,maxtouch";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_touch>;
+		reg = <0x4a>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <1 IRQ_TYPE_EDGE_FALLING>;    /* Apalis GPIO5 */
+		reset-gpios = <&gpio4 2 GPIO_ACTIVE_HIGH>; /* Apalis GPIO6 */
+		status = "okay";
+	};
 };
 
 /* Apalis I2C3 (CAM) */
@@ -442,13 +464,12 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_cam1_gpios>, <&pinctrl_dap1_gpios>,
 		    <&pinctrl_esai0_gpios>, <&pinctrl_fec2_gpios>,
-		    <&pinctrl_gpio34>, <&pinctrl_gpio56>,
-		    <&pinctrl_gpio_usbh_oc_n>, <&pinctrl_lpuart1ctrl>,
-		    <&pinctrl_lvds0_i2c0_gpio>, <&pinctrl_lvds1_i2c0_gpios>,
-		    <&pinctrl_mipi_dsi_0_1_en>, <&pinctrl_mipi_dsi1_gpios>,
-		    <&pinctrl_mlb_gpios>, <&pinctrl_qspi1a_gpios>,
-		    <&pinctrl_sata1_act>, <&pinctrl_sim0_gpios>,
-		    <&pinctrl_usdhc1_gpios>;
+		    <&pinctrl_gpio34>, <&pinctrl_gpio_usbh_oc_n>,
+		    <&pinctrl_lpuart1ctrl>, <&pinctrl_lvds0_i2c0_gpio>,
+		    <&pinctrl_lvds1_i2c0_gpios>, <&pinctrl_mipi_dsi_0_1_en>,
+		    <&pinctrl_mipi_dsi1_gpios>, <&pinctrl_mlb_gpios>,
+		    <&pinctrl_qspi1a_gpios>, <&pinctrl_sata1_act>,
+		    <&pinctrl_sim0_gpios>, <&pinctrl_usdhc1_gpios>;
 
 	apalis-imx8qm {
 		/* Apalis AN1_ADC */
@@ -580,11 +601,9 @@
 		};
 
 		/* Apalis GPIO5+6 */
-		pinctrl_gpio56: gpio56grp {
+		pinctrl_touch: touchgrp {
 			fsl,pins = <
-				/* Apalis GPIO5 */
 				SC_P_FLEXCAN2_RX_LSIO_GPIO4_IO01		0x06000021
-				/* Apalis GPIO6 */
 				SC_P_FLEXCAN2_TX_LSIO_GPIO4_IO02		0x06000021
 			>;
 		};
@@ -1218,43 +1237,27 @@
 	status = "okay";
 };
 
-/* Apalis LVDS1 */
-//TBD: enabling breaks HDMI
-#if 0
 &ldb2_phy {
 	status = "okay";
 };
 
 &ldb2 {
-	fsl,dual-channel;
 	status = "okay";
 
 	lvds-channel@0 {
 		fsl,data-mapping = "spwg";
-		fsl,data-width = <18>;
-		primary;
+		fsl,data-width = <24>;
 		status = "okay";
 
-		display-timings {
-			native-mode = <&timing_fullhd>;
-			timing_fullhd: 1920x1080 {
-				clock-frequency = <138500000>;
-				hactive = <1920>;
-				vactive = <1080>;
-				hback-porch = <80>;
-				hfront-porch = <48>;
-				vback-porch = <23>;
-				vfront-porch = <3>;
-				hsync-len = <32>;
-				vsync-len = <5>;
-				hsync-active = <0>;
-				vsync-active = <0>;
-				pixelclk-active = <0>;
+		port@1 {
+			reg = <1>;
+
+			lvds1_out: endpoint {
+				remote-endpoint = <&panel_lvds1_in>;
 			};
 		};
 	};
 };
-#endif
 
 /* Apalis SPI1 */
 &lpspi0 {