Kernel-4.18.0-80.el8_samsung,ld9040

Samsung LD9040 AMOLED LCD parallel RGB panel with SPI control bus

Required properties:

• compatible: “samsung,ld9040”
• reg: address of the panel on SPI bus
• vdd3-supply: core voltage supply
• vci-supply: voltage supply for analog circuits
• reset-gpios: a GPIO spec for the reset pin
• display-timings: timings for the connected panel according to 1

The panel must obey rules for SPI slave device specified in document 2.

Optional properties:

• power-on-delay: delay after turning regulators on [ms]
• reset-delay: delay after reset sequence [ms]
• panel-width-mm: physical panel width [mm]
• panel-height-mm: physical panel height [mm]

The device node can contain one ‘port’ child node with one child
‘endpoint’ node, according to the bindings defined in 3. This
node should describe panel’s video bus.

Example:

lcd@0 {
    compatible = "samsung,ld9040";
    reg = <0>;
    vdd3-supply = <&ldo7_reg>;
    vci-supply = <&ldo17_reg>;
    reset-gpios = <&gpy4 5 0>;
    spi-max-frequency = <1200000>;
    spi-cpol;
    spi-cpha;
    power-on-delay = <10>;
    reset-delay = <10>;
    panel-width-mm = <90>;
    panel-height-mm = <154>;

    display-timings {
        timing {
            clock-frequency = <23492370>;
            hactive = <480>;
            vactive = <800>;
            hback-porch = <16>;
            hfront-porch = <16>;
            vback-porch = <2>;
            vfront-porch = <28>;
            hsync-len = <2>;
            vsync-len = <1>;
            hsync-active = <0>;
            vsync-active = <0>;
            de-active = <0>;
            pixelclk-active = <0>;
        };
    };

    port {
        lcd_ep: endpoint {
            remote-endpoint = <&fimd_dpi_ep>;
        };
    };
};