1 Device-tree bindings for ColdFire offloaded gp 1 Device-tree bindings for ColdFire offloaded gpio-based FSI master driver
2 ---------------------------------------------- 2 ------------------------------------------------------------------------
3 3
4 Required properties: 4 Required properties:
5 - compatible = 5 - compatible =
6 "aspeed,ast2400-cf-fsi-master" for an 6 "aspeed,ast2400-cf-fsi-master" for an AST2400 based system
7 or 7 or
8 "aspeed,ast2500-cf-fsi-master" for an 8 "aspeed,ast2500-cf-fsi-master" for an AST2500 based system
9 9
10 - clock-gpios = <gpio-descriptor>; : GPIO 10 - clock-gpios = <gpio-descriptor>; : GPIO for FSI clock
11 - data-gpios = <gpio-descriptor>; : GPIO 11 - data-gpios = <gpio-descriptor>; : GPIO for FSI data signal
12 - enable-gpios = <gpio-descriptor>; : GPIO 12 - enable-gpios = <gpio-descriptor>; : GPIO for enable signal
13 - trans-gpios = <gpio-descriptor>; : GPIO 13 - trans-gpios = <gpio-descriptor>; : GPIO for voltage translator enable
14 - mux-gpios = <gpio-descriptor>; : GPIO 14 - mux-gpios = <gpio-descriptor>; : GPIO for pin multiplexing with other
15 func 15 functions (eg, external FSI masters)
16 - memory-region = <phandle>; : Refe 16 - memory-region = <phandle>; : Reference to the reserved memory for
17 the 17 the ColdFire. Must be 2M aligned on
18 AST2 18 AST2400 and 1M aligned on AST2500
19 - aspeed,sram = <phandle>; : Refe 19 - aspeed,sram = <phandle>; : Reference to the SRAM node.
20 - aspeed,cvic = <phandle>; : Refe 20 - aspeed,cvic = <phandle>; : Reference to the CVIC node.
21 21
22 Examples: 22 Examples:
23 23
24 fsi-master { 24 fsi-master {
25 compatible = "aspeed,ast2500-cf-fsi-ma 25 compatible = "aspeed,ast2500-cf-fsi-master", "fsi-master";
26 26
27 clock-gpios = <&gpio 0>; 27 clock-gpios = <&gpio 0>;
28 data-gpios = <&gpio 1>; 28 data-gpios = <&gpio 1>;
29 enable-gpios = <&gpio 2>; 29 enable-gpios = <&gpio 2>;
30 trans-gpios = <&gpio 3>; 30 trans-gpios = <&gpio 3>;
31 mux-gpios = <&gpio 4>; 31 mux-gpios = <&gpio 4>;
32 32
33 memory-region = <&coldfire_memory>; 33 memory-region = <&coldfire_memory>;
34 aspeed,sram = <&sram>; 34 aspeed,sram = <&sram>;
35 aspeed,cvic = <&cvic>; 35 aspeed,cvic = <&cvic>;
36 } 36 }
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