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1Samsung LD9040 AMOLED LCD parallel RGB panel with SPI control bus
2
3Required properties:
4 - compatible: "samsung,ld9040"
5 - reg: address of the panel on SPI bus
6 - vdd3-supply: core voltage supply
7 - vci-supply: voltage supply for analog circuits
8 - reset-gpios: a GPIO spec for the reset pin
9 - display-timings: timings for the connected panel according to [1]
10
11The panel must obey rules for SPI slave device specified in document [2].
12
13Optional properties:
14 - power-on-delay: delay after turning regulators on [ms]
15 - reset-delay: delay after reset sequence [ms]
16 - panel-width-mm: physical panel width [mm]
17 - panel-height-mm: physical panel height [mm]
18
19The device node can contain one 'port' child node with one child
20'endpoint' node, according to the bindings defined in [3]. This
21node should describe panel's video bus.
22
23[1]: Documentation/devicetree/bindings/video/display-timing.txt
24[2]: Documentation/devicetree/bindings/spi/spi-bus.txt
25[3]: Documentation/devicetree/bindings/media/video-interfaces.txt
26
27Example:
28
29 lcd@0 {
30 compatible = "samsung,ld9040";
31 reg = <0>;
32 vdd3-supply = <&ldo7_reg>;
33 vci-supply = <&ldo17_reg>;
34 reset-gpios = <&gpy4 5 0>;
35 spi-max-frequency = <1200000>;
36 spi-cpol;
37 spi-cpha;
38 power-on-delay = <10>;
39 reset-delay = <10>;
40 panel-width-mm = <90>;
41 panel-height-mm = <154>;
42
43 display-timings {
44 timing {
45 clock-frequency = <23492370>;
46 hactive = <480>;
47 vactive = <800>;
48 hback-porch = <16>;
49 hfront-porch = <16>;
50 vback-porch = <2>;
51 vfront-porch = <28>;
52 hsync-len = <2>;
53 vsync-len = <1>;
54 hsync-active = <0>;
55 vsync-active = <0>;
56 de-active = <0>;
57 pixelclk-active = <0>;
58 };
59 };
60
61 port {
62 lcd_ep: endpoint {
63 remote-endpoint = <&fimd_dpi_ep>;
64 };
65 };
66 };