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The FSI master has some associated GPIOs that may be present on some hardware configurations. Reviewed-by: Andrew Jeffery <andrew@aj.id.au> Link: https://lore.kernel.org/r/20200728025527.174503-2-joel@jms.id.au Signed-off-by: Joel Stanley <joel@jms.id.au>
36 lines
1.1 KiB
Text
36 lines
1.1 KiB
Text
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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