Documentation/devicetree/bindings/fsi/fsi-master-aspeed.txt

   1 Device-tree bindings for AST2600 FSI master
   2 -------------------------------------------
   3
   4 The AST2600 contains two identical FSI masters. They share a clock and have a
   5 separate interrupt line and output pins.
   6
   7 Required properties:
   8  - compatible: "aspeed,ast2600-fsi-master"
   9  - reg: base address and length
  10  - clocks: phandle and clock number
  11  - interrupts: platform dependent interrupt description
  12  - pinctrl-0: phandle to pinctrl node
  13  - pinctrl-names: pinctrl state
  14
  15 Optional properties:
  16  - cfam-reset-gpios: GPIO for CFAM reset
  17
  18  - fsi-routing-gpios: GPIO for setting the FSI mux (internal or cabled)
  19  - fsi-mux-gpios: GPIO for detecting the desired FSI mux state
  20
  21
  22 Examples:
  23
  24     fsi-master {
  25         compatible = "aspeed,ast2600-fsi-master", "fsi-master";
  26         reg = <0x1e79b000 0x94>;
  27         interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
  28         pinctrl-names = "default";
  29         pinctrl-0 = <&pinctrl_fsi1_default>;
  30         clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;
  31
  32         fsi-routing-gpios = <&gpio0 ASPEED_GPIO(Q, 7) GPIO_ACTIVE_HIGH>;
  33         fsi-mux-gpios = <&gpio0 ASPEED_GPIO(B, 0) GPIO_ACTIVE_HIGH>;
  34
  35         cfam-reset-gpios = <&gpio0 ASPEED_GPIO(Q, 0) GPIO_ACTIVE_LOW>;
  36     };