ARM: dts: imx6qdl-udoo: add 7 inch LCD touchscreen panel support

The official UDOO board kit has 7 and 15.6 inch touchscreen LCD panels
as options.

This patch adds support for 7 inch panel only, but the 15.6 inch one
should be easy to add using the same regulator, backlight device and
LVDS channel.

Since this panel is an option for UDOO board it is disabled by default
and can be enabled (for example) by the following U-Boot commands:
fdt set backlight status okay
fdt set panelchan status okay
fdt set panel7 status okay
fdt set touchscreenp7 status okay

The LVDS channels is also disabled by default to avoid warning from its
driver.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
index d3e54e4..0dd5aa1 100644 (file)
--- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
@@ -10,14 +10,49 @@
  */
 
 / {
+       aliases {
+               backlight = &backlight;
+               panelchan = &panelchan;
+               panel7 = &panel7;
+               touchscreenp7 = &touchscreenp7;
+       };
+
        chosen {
                stdout-path = &uart2;
        };
 
+       backlight: backlight {
+               compatible = "gpio-backlight";
+               gpios = <&gpio1 4 0>;
+               default-on;
+               status = "disabled";
+       };
+
        memory {
                reg = <0x10000000 0x40000000>;
        };
 
+       panel7: panel7 {
+               /*
+                * in reality it is a -20t (parallel) model,
+                * but with LVDS bridge chip attached,
+                * so it is equivalent to -19t model in drive
+                * characteristics
+                */
+               compatible = "urt,umsh-8596md-19t";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_panel>;
+               power-supply = <&reg_panel>;
+               backlight = <&backlight>;
+               status = "disabled";
+
+               port {
+                       panel_in: endpoint {
+                               remote-endpoint = <&lvds0_out>;
+                       };
+               };
+       };
+
        regulators {
                compatible = "simple-bus";
                #address-cells = <1>;
@@ -33,6 +68,14 @@
                        startup-delay-us = <2>; /* USB2415 requires a POR of 1 us minimum */
                        gpio = <&gpio7 12 0>;
                };
+
+               reg_panel: regulator@1 {
+                       compatible = "regulator-fixed";
+                       reg = <1>;
+                       regulator-name = "lcd_panel";
+                       enable-active-high;
+                       gpio = <&gpio1 2 0>;
+               };
        };
 
        sound {
@@ -67,6 +110,24 @@
        status = "okay";
 };
 
+&i2c3 {
+       clock-frequency = <100000>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_i2c3>;
+       status = "okay";
+
+       touchscreenp7: touchscreenp7@55 {
+               compatible = "sitronix,st1232";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_touchscreenp7>;
+               reg = <0x55>;
+               interrupt-parent = <&gpio1>;
+               interrupts = <13 8>;
+               gpios = <&gpio1 15 0>;
+               status = "disabled";
+       };
+};
+
 &iomuxc {
        imx6q-udoo {
                pinctrl_enet: enetgrp {
@@ -97,6 +158,27 @@
                        >;
                };
 
+               pinctrl_i2c3: i2c3grp {
+                       fsl,pins = <
+                               MX6QDL_PAD_GPIO_5__I2C3_SCL             0x4001f8b1
+                               MX6QDL_PAD_GPIO_6__I2C3_SDA             0x4001f8b1
+                       >;
+               };
+
+               pinctrl_panel: panelgrp {
+                       fsl,pins = <
+                               MX6QDL_PAD_GPIO_2__GPIO1_IO02           0x70
+                               MX6QDL_PAD_GPIO_4__GPIO1_IO04           0x70
+                       >;
+               };
+
+               pinctrl_touchscreenp7: touchscreenp7grp {
+                       fsl,pins = <
+                               MX6QDL_PAD_SD2_DAT0__GPIO1_IO15         0x70
+                               MX6QDL_PAD_SD2_DAT2__GPIO1_IO13         0x1b0b0
+                       >;
+               };
+
                pinctrl_uart2: uart2grp {
                        fsl,pins = <
                                MX6QDL_PAD_EIM_D26__UART2_TX_DATA       0x1b0b1
@@ -154,6 +236,20 @@
        };
 };
 
+&ldb {
+       status = "okay";
+
+       panelchan: lvds-channel@0 {
+               port@4 {
+                       reg = <4>;
+
+                       lvds0_out: endpoint {
+                               remote-endpoint = <&panel_in>;
+                       };
+               };
+       };
+};
+
 &uart2 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_uart2>;