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    Subject[PATCH 5.8 512/633] ARM: dts: iwg20d-q7-common: Fix touch controller probe failure
    Date
    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


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