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[karo-tx-linux.git] / Documentation / devicetree / bindings / display / imx / fsl,imx-fb.txt
1 Freescale imx21 Framebuffer
2
3 This framebuffer driver supports devices imx1, imx21, imx25, and imx27.
4
5 Required properties:
6 - compatible : "fsl,<chip>-fb", chip should be imx1 or imx21
7 - reg : Should contain 1 register ranges(address and length)
8 - interrupts : One interrupt of the fb dev
9
10 Required nodes:
11 - display: Phandle to a display node as described in
12         Documentation/devicetree/bindings/display/display-timing.txt
13         Additional, the display node has to define properties:
14         - bits-per-pixel: Bits per pixel
15         - fsl,pcr: LCDC PCR value
16
17 Optional properties:
18 - lcd-supply: Regulator for LCD supply voltage.
19 - fsl,dmacr: DMA Control Register value. This is optional. By default, the
20         register is not modified as recommended by the datasheet.
21 - fsl,lpccr: Contrast Control Register value. This property provides the
22         default value for the contrast control register.
23         If that property is omitted, the register is zeroed.
24 - fsl,lscr1: LCDC Sharp Configuration Register value.
25
26 Example:
27
28         imxfb: fb@10021000 {
29                 compatible = "fsl,imx21-fb";
30                 interrupts = <61>;
31                 reg = <0x10021000 0x1000>;
32                 display = <&display0>;
33         };
34
35         ...
36
37         display0: display0 {
38                 model = "Primeview-PD050VL1";
39                 native-mode = <&timing_disp0>;
40                 bits-per-pixel = <16>;
41                 fsl,pcr = <0xf0c88080>; /* non-standard but required */
42                 display-timings {
43                         timing_disp0: 640x480 {
44                                 hactive = <640>;
45                                 vactive = <480>;
46                                 hback-porch = <112>;
47                                 hfront-porch = <36>;
48                                 hsync-len = <32>;
49                                 vback-porch = <33>;
50                                 vfront-porch = <33>;
51                                 vsync-len = <2>;
52                                 clock-frequency = <25000000>;
53                         };
54                 };
55         };