1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
Atmel LCDC Framebuffer
-----------------------------------------------------
Required properties:
- compatible :
"atmel,at91sam9261-lcdc" ,
"atmel,at91sam9263-lcdc" ,
"atmel,at91sam9g10-lcdc" ,
"atmel,at91sam9g45-lcdc" ,
"atmel,at91sam9g45es-lcdc" ,
"atmel,at91sam9rl-lcdc" ,
"atmel,at32ap-lcdc"
- reg : Should contain 1 register ranges(address and length).
Can contain an additional register range(address and length)
for fixed framebuffer memory. Useful for dedicated memories.
- interrupts : framebuffer controller interrupt
- display: a phandle pointing to the display node
Required nodes:
- display: a display node is required to initialize the lcd panel
This should be in the board dts.
- default-mode: a videomode within the display with timing parameters
as specified below.
Optional properties:
- lcd-supply: Regulator for LCD supply voltage.
Example:
fb0: fb@0x00500000 {
compatible = "atmel,at91sam9g45-lcdc";
reg = <0x00500000 0x1000>;
interrupts = <23 3 0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_fb>;
display = <&display0>;
status = "okay";
#address-cells = <1>;
#size-cells = <1>;
};
Example for fixed framebuffer memory:
fb0: fb@0x00500000 {
compatible = "atmel,at91sam9263-lcdc";
reg = <0x00700000 0x1000 0x70000000 0x200000>;
[...]
};
Atmel LCDC Display
-----------------------------------------------------
Required properties (as per of_videomode_helper):
- atmel,dmacon: dma controller configuration
- atmel,lcdcon2: lcd controller configuration
- atmel,guard-time: lcd guard time (Delay in frame periods)
- bits-per-pixel: lcd panel bit-depth.
Optional properties (as per of_videomode_helper):
- atmel,lcdcon-backlight: enable backlight
- atmel,lcdcon-backlight-inverted: invert backlight PWM polarity
- atmel,lcd-wiring-mode: lcd wiring mode "RGB" or "BRG"
- atmel,power-control-gpio: gpio to power on or off the LCD (as many as needed)
Example:
display0: display {
bits-per-pixel = <32>;
atmel,lcdcon-backlight;
atmel,dmacon = <0x1>;
atmel,lcdcon2 = <0x80008002>;
atmel,guard-time = <9>;
atmel,lcd-wiring-mode = <1>;
display-timings {
native-mode = <&timing0>;
timing0: timing0 {
clock-frequency = <9000000>;
hactive = <480>;
vactive = <272>;
hback-porch = <1>;
hfront-porch = <1>;
vback-porch = <40>;
vfront-porch = <1>;
hsync-len = <45>;
vsync-len = <1>;
};
};
};
|
