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| -rw-r--r-- | Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-backend.yaml | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-backend.yaml b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-backend.yaml new file mode 100644 index 000000000..ba06d1857 --- /dev/null +++ b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-backend.yaml @@ -0,0 +1,272 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/allwinner,sun4i-a10-display-backend.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Allwinner A10 Display Engine Backend + +maintainers: + - Chen-Yu Tsai <wens@csie.org> + - Maxime Ripard <mripard@kernel.org> + +description: | + The display engine backend exposes layers and sprites to the system. + +properties: + compatible: + enum: + - allwinner,sun4i-a10-display-backend + - allwinner,sun5i-a13-display-backend + - allwinner,sun6i-a31-display-backend + - allwinner,sun7i-a20-display-backend + - allwinner,sun8i-a23-display-backend + - allwinner,sun8i-a33-display-backend + - allwinner,sun9i-a80-display-backend + + reg: + minItems: 1 + items: + - description: Display Backend registers + - description: SAT registers + + reg-names: + minItems: 1 + items: + - const: be + - const: sat + + interrupts: + maxItems: 1 + + clocks: + minItems: 3 + items: + - description: The backend interface clock + - description: The backend module clock + - description: The backend DRAM clock + - description: The SAT clock + + clock-names: + minItems: 3 + items: + - const: ahb + - const: mod + - const: ram + - const: sat + + resets: + minItems: 1 + items: + - description: The Backend reset line + - description: The SAT reset line + + reset-names: + minItems: 1 + items: + - const: be + - const: sat + + # FIXME: This should be made required eventually once every SoC will + # have the MBUS declared. + interconnects: + maxItems: 1 + + # FIXME: This should be made required eventually once every SoC will + # have the MBUS declared. + interconnect-names: + const: dma-mem + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: + Input endpoints of the controller. + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: + Output endpoints of the controller. + + required: + - port@0 + - port@1 + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - resets + - ports + +additionalProperties: false + +if: + properties: + compatible: + contains: + const: allwinner,sun8i-a33-display-backend + +then: + properties: + reg: + minItems: 2 + + reg-names: + minItems: 2 + + clocks: + minItems: 4 + + clock-names: + minItems: 4 + + resets: + minItems: 2 + + reset-names: + minItems: 2 + + required: + - reg-names + - reset-names + +else: + properties: + reg: + maxItems: 1 + + reg-names: + maxItems: 1 + + clocks: + maxItems: 3 + + clock-names: + maxItems: 3 + + resets: + maxItems: 1 + + reset-names: + maxItems: 1 + +examples: + - | + /* + * This comes from the clock/sun4i-a10-ccu.h and + * reset/sun4i-a10-ccu.h headers, but we can't include them since + * it would trigger a bunch of warnings for redefinitions of + * symbols with the other example. + */ + + #define CLK_AHB_DE_BE0 42 + #define CLK_DRAM_DE_BE0 140 + #define CLK_DE_BE0 144 + #define RST_DE_BE0 5 + + display-backend@1e60000 { + compatible = "allwinner,sun4i-a10-display-backend"; + reg = <0x01e60000 0x10000>; + interrupts = <47>; + clocks = <&ccu CLK_AHB_DE_BE0>, <&ccu CLK_DE_BE0>, + <&ccu CLK_DRAM_DE_BE0>; + clock-names = "ahb", "mod", + "ram"; + resets = <&ccu RST_DE_BE0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0>; + + endpoint@0 { + reg = <0>; + remote-endpoint = <&fe0_out_be0>; + }; + + endpoint@1 { + reg = <1>; + remote-endpoint = <&fe1_out_be0>; + }; + }; + + port@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <1>; + + endpoint@0 { + reg = <0>; + remote-endpoint = <&tcon0_in_be0>; + }; + + endpoint@1 { + reg = <1>; + remote-endpoint = <&tcon1_in_be0>; + }; + }; + }; + }; + + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + /* + * This comes from the clock/sun8i-a23-a33-ccu.h and + * reset/sun8i-a23-a33-ccu.h headers, but we can't include them + * since it would trigger a bunch of warnings for redefinitions of + * symbols with the other example. + */ + + #define CLK_BUS_DE_BE 40 + #define CLK_BUS_SAT 46 + #define CLK_DRAM_DE_BE 84 + #define CLK_DE_BE 85 + #define RST_BUS_DE_BE 21 + #define RST_BUS_SAT 27 + + display-backend@1e60000 { + compatible = "allwinner,sun8i-a33-display-backend"; + reg = <0x01e60000 0x10000>, <0x01e80000 0x1000>; + reg-names = "be", "sat"; + interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&ccu CLK_BUS_DE_BE>, <&ccu CLK_DE_BE>, + <&ccu CLK_DRAM_DE_BE>, <&ccu CLK_BUS_SAT>; + clock-names = "ahb", "mod", + "ram", "sat"; + resets = <&ccu RST_BUS_DE_BE>, <&ccu RST_BUS_SAT>; + reset-names = "be", "sat"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + endpoint { + remote-endpoint = <&fe0_out_be0>; + }; + }; + + port@1 { + reg = <1>; + + endpoint { + remote-endpoint = <&drc0_in_be0>; + }; + }; + }; + }; + +... |