tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1Freescale imx21 Framebuffer
2
3This framebuffer driver supports devices imx1, imx21, imx25, and imx27.
4
5Required 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
10Required nodes:
11- display: Phandle to a display node as described in
12 Documentation/devicetree/bindings/video/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
17Optional 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 ommited, the register is zeroed.
24- fsl,lscr1: LCDC Sharp Configuration Register value.
25
26Example:
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 };