[PATCH 5.9 623/757] ARM: dts: iwg20d-q7-common: Fix touch controller probe failure

Greg Kroah-Hartman
2020-10-27T16:38:11Z

From: Biju Das <biju.das.jz@bp.renesas.com>

[ Upstream commit 08d7a73fffb6769b1cf2278bf697e692daba3abf ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/iwg20d-q7-common.dtsi | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/iwg20d-q7-common.dtsi b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
index ebbe1518ef8a6..63cafd220dba1 100644
--- a/arch/arm/boot/dts/iwg20d-q7-common.dtsi
+++ b/arch/arm/boot/dts/iwg20d-q7-common.dtsi
@@ -57,7 +57,7 @@ lcd_backlight: backlight {

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 @@ lvds_receiver_out: endpoint {
panel {
compatible = "edt,etm0700g0dh6";
backlight = <&lcd_backlight>;
+ power-supply = <&vcc_3v3_tft1>;

port {
panel_in: endpoint {
@@ -113,6 +114,17 @@ sndcodec: simple-audio-card,codec {
};
};

+ 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 @@ touch: touchpanel@38 {
reg = <0x38>;
interrupt-parent = <&gpio2>;
interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
+ vcc-supply = <&vcc_3v3_tft1>;
};
};

--
2.25.1