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dt-bindings: fsi: Document gpios

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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>
This commit is contained in:
Joel Stanley 2020-07-28 12:25:23 +09:30
parent 59165631b7
commit 4d4905f6cc
1 changed files with 12 additions and 0 deletions
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12
Documentation/devicetree/bindings/fsi/fsi-master-aspeed.txt
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@ -12,6 +12,13 @@ Required properties:
- pinctrl-0: phandle to pinctrl node
- pinctrl-names: pinctrl state
Optional properties:
- cfam-reset-gpios: GPIO for CFAM reset
- fsi-routing-gpios: GPIO for setting the FSI mux (internal or cabled)
- fsi-mux-gpios: GPIO for detecting the desired FSI mux state
Examples:
fsi-master {
@ -21,4 +28,9 @@ Examples:
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_fsi1_default>;
clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;
fsi-routing-gpios = <&gpio0 ASPEED_GPIO(Q, 7) GPIO_ACTIVE_HIGH>;
fsi-mux-gpios = <&gpio0 ASPEED_GPIO(B, 0) GPIO_ACTIVE_HIGH>;
cfam-reset-gpios = <&gpio0 ASPEED_GPIO(Q, 0) GPIO_ACTIVE_LOW>;
};