ARM: dts: iwg20d-q7-common: Fix touch controller probe failure

As per the iWave RZ/G1M schematic, the signal LVDS_PPEN controls the
supply voltage for the touch panel, LVDS receiver and RGB LCD panel. Add
a regulator for these device nodes and remove the powerdown-gpios
property from the lvds-receiver node as it results in a touch controller
driver probe failure.

Fixes: 6f89dd9e9325 ("ARM: dts: iwg20d-q7-common: Add LCD support")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20200924080535.3641-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm/boot/dts/iwg20d-q7-common.dtsi b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
index ebbe151..63cafd2 100644 (file)
--- a/arch/arm/boot/dts/iwg20d-q7-common.dtsi
+++ b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
@@ -57,7 +57,7 @@
 
        lvds-receiver {
                compatible = "ti,ds90cf384a", "lvds-decoder";
-               powerdown-gpios = <&gpio7 25 GPIO_ACTIVE_LOW>;
+               power-supply = <&vcc_3v3_tft1>;
 
                ports {
                        #address-cells = <1>;
@@ -81,6 +81,7 @@
        panel {
                compatible = "edt,etm0700g0dh6";
                backlight = <&lcd_backlight>;
+               power-supply = <&vcc_3v3_tft1>;
 
                port {
                        panel_in: endpoint {
@@ -113,6 +114,17 @@
                };
        };
 
+       vcc_3v3_tft1: regulator-panel {
+               compatible = "regulator-fixed";
+
+               regulator-name = "vcc-3v3-tft1";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               enable-active-high;
+               startup-delay-us = <500>;
+               gpio = <&gpio7 25 GPIO_ACTIVE_HIGH>;
+       };
+
        vcc_sdhi1: regulator-vcc-sdhi1 {
                compatible = "regulator-fixed";
 
@@ -207,6 +219,7 @@
                reg = <0x38>;
                interrupt-parent = <&gpio2>;
                interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
+               vcc-supply = <&vcc_3v3_tft1>;
        };
 };