Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Cirrus 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 = <®5v0>; |
| 25 | display = <&display>; |
| 26 | }; |
| 27 | |
| 28 | display: display { |
| 29 | model = "320x240x4"; |
| 30 | bits-per-pixel = <4>; |
| 31 | ac-prescale = <17>; |
| 32 | |
| 33 | display-timings { |
| 34 | native-mode = <&timing0>; |
| 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 | }; |