GNU Linux-libre 4.14.266-gnu1
[releases.git] / Documentation / devicetree / bindings / display / cirrus,clps711x-fb.txt
1 * Currus Logic CLPS711X Framebuffer
2
3 Required properties:
4 - compatible: Shall contain "cirrus,ep7209-fb".
5 - reg       : Physical base address and length of the controller's registers +
6               location and size of the framebuffer memory.
7 - clocks    : phandle + clock specifier pair of the FB reference clock.
8 - display   : phandle to a display node as described in
9               Documentation/devicetree/bindings/display/panel/display-timing.txt.
10               Additionally, the display node has to define properties:
11   - bits-per-pixel: Bits per pixel.
12   - ac-prescale   : LCD AC bias frequency. This frequency is the required
13                     AC bias frequency for a given manufacturer's LCD plate.
14   - cmap-invert   : Invert the color levels (Optional).
15
16 Optional properties:
17 - lcd-supply: Regulator for LCD supply voltage.
18
19 Example:
20         fb: fb@800002c0 {
21                 compatible = "cirrus,ep7312-fb", "cirrus,ep7209-fb";
22                 reg = <0x800002c0 0xd44>, <0x60000000 0xc000>;
23                 clocks = <&clks 2>;
24                 lcd-supply = <&reg5v0>;
25                 display = <&display>;
26         };
27
28         display: display {
29                 model = "320x240x4";
30                 native-mode = <&timing0>;
31                 bits-per-pixel = <4>;
32                 ac-prescale = <17>;
33
34                 display-timings {
35                         timing0: 320x240 {
36                                 hactive = <320>;
37                                 hback-porch = <0>;
38                                 hfront-porch = <0>;
39                                 hsync-len = <0>;
40                                 vactive = <240>;
41                                 vback-porch = <0>;
42                                 vfront-porch = <0>;
43                                 vsync-len = <0>;
44                                 clock-frequency = <6500000>;
45                         };
46                 };
47         };