tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1Device tree configuration for the GFX display device on the ASPEED SoCs
2
3Required properties:
4 - compatible
5 * Must be one of the following:
6 + aspeed,ast2500-gfx
7 + aspeed,ast2400-gfx
8 * In addition, the ASPEED pinctrl bindings require the 'syscon' property to
9 be present
10
11 - reg: Physical base address and length of the GFX registers
12
13 - interrupts: interrupt number for the GFX device
14
15 - clocks: clock number used to generate the pixel clock
16
17 - resets: reset line that must be released to use the GFX device
18
19 - memory-region:
20 Phandle to a memory region to allocate from, as defined in
21 Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
22
23
24Example:
25
26gfx: display@1e6e6000 {
27 compatible = "aspeed,ast2500-gfx", "syscon";
28 reg = <0x1e6e6000 0x1000>;
29 reg-io-width = <4>;
30 clocks = <&syscon ASPEED_CLK_GATE_D1CLK>;
31 resets = <&syscon ASPEED_RESET_CRT1>;
32 interrupts = <0x19>;
33 memory-region = <&gfx_memory>;
34};
35
36gfx_memory: framebuffer {
37 size = <0x01000000>;
38 alignment = <0x01000000>;
39 compatible = "shared-dma-pool";
40 reusable;
41};