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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/contrib/device-tree/Bindings/fsi/fsi-master-aspeed.txt
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Device-tree bindings for AST2600 FSI master

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The AST2600 contains two identical FSI masters. They share a clock and have a

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separate interrupt line and output pins.

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Required properties:

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 - compatible: "aspeed,ast2600-fsi-master"

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 - reg: base address and length

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 - clocks: phandle and clock number

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 - interrupts: platform dependent interrupt description

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 - pinctrl-0: phandle to pinctrl node

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 - pinctrl-names: pinctrl state

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Optional properties:

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 - cfam-reset-gpios: GPIO for CFAM reset

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 - fsi-routing-gpios: GPIO for setting the FSI mux (internal or cabled)

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 - fsi-mux-gpios: GPIO for detecting the desired FSI mux state

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Examples:

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    fsi-master {

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        compatible = "aspeed,ast2600-fsi-master", "fsi-master";

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        reg = <0x1e79b000 0x94>;

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	interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;

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	pinctrl-names = "default";

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	pinctrl-0 = <&pinctrl_fsi1_default>;

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	clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;

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	fsi-routing-gpios = <&gpio0 ASPEED_GPIO(Q, 7) GPIO_ACTIVE_HIGH>;

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	fsi-mux-gpios = <&gpio0 ASPEED_GPIO(B, 0) GPIO_ACTIVE_HIGH>;

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	cfam-reset-gpios = <&gpio0 ASPEED_GPIO(Q, 0) GPIO_ACTIVE_LOW>;

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    };

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