1 Device tree configuration for the GFX display 1 Device tree configuration for the GFX display device on the ASPEED SoCs
2 2
3 Required properties: 3 Required properties:
4 - compatible 4 - compatible
5 * Must be one of the following: 5 * Must be one of the following:
6 + aspeed,ast2500-gfx 6 + aspeed,ast2500-gfx
7 + aspeed,ast2400-gfx 7 + aspeed,ast2400-gfx
8 * In addition, the ASPEED pinctrl bindings 8 * In addition, the ASPEED pinctrl bindings require the 'syscon' property to
9 be present 9 be present
10 10
11 - reg: Physical base address and length of t 11 - reg: Physical base address and length of the GFX registers
12 12
13 - interrupts: interrupt number for the GFX d 13 - interrupts: interrupt number for the GFX device
14 14
15 - clocks: clock number used to generate the 15 - clocks: clock number used to generate the pixel clock
16 16
17 - resets: reset line that must be released t 17 - resets: reset line that must be released to use the GFX device
18 18
19 - memory-region: 19 - memory-region:
20 Phandle to a memory region to allocate fro 20 Phandle to a memory region to allocate from, as defined in
21 Documentation/devicetree/bindings/reserved 21 Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
22 22
23 23
24 Example: 24 Example:
25 25
26 gfx: display@1e6e6000 { 26 gfx: display@1e6e6000 {
27 compatible = "aspeed,ast2500-gfx", "sy 27 compatible = "aspeed,ast2500-gfx", "syscon";
28 reg = <0x1e6e6000 0x1000>; 28 reg = <0x1e6e6000 0x1000>;
29 reg-io-width = <4>; 29 reg-io-width = <4>;
30 clocks = <&syscon ASPEED_CLK_GATE_D1CL 30 clocks = <&syscon ASPEED_CLK_GATE_D1CLK>;
31 resets = <&syscon ASPEED_RESET_CRT1>; 31 resets = <&syscon ASPEED_RESET_CRT1>;
32 interrupts = <0x19>; 32 interrupts = <0x19>;
33 memory-region = <&gfx_memory>; 33 memory-region = <&gfx_memory>;
34 }; 34 };
35 35
36 gfx_memory: framebuffer { 36 gfx_memory: framebuffer {
37 size = <0x01000000>; 37 size = <0x01000000>;
38 alignment = <0x01000000>; 38 alignment = <0x01000000>;
39 compatible = "shared-dma-pool"; 39 compatible = "shared-dma-pool";
40 reusable; 40 reusable;
41 }; 41 };
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