| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | Device-tree bindings for ColdFire offloaded gpio-based FSI master driver |
| 2 | ------------------------------------------------------------------------ |
| 3 | |
| 4 | Required properties: |
| 5 | - compatible = |
| 6 | "aspeed,ast2400-cf-fsi-master" for an AST2400 based system |
| 7 | or |
| 8 | "aspeed,ast2500-cf-fsi-master" for an AST2500 based system |
| 9 | |
| 10 | - clock-gpios = <gpio-descriptor>; : GPIO for FSI clock |
| 11 | - data-gpios = <gpio-descriptor>; : GPIO for FSI data signal |
| 12 | - enable-gpios = <gpio-descriptor>; : GPIO for enable signal |
| 13 | - trans-gpios = <gpio-descriptor>; : GPIO for voltage translator enable |
| 14 | - mux-gpios = <gpio-descriptor>; : GPIO for pin multiplexing with other |
| 15 | functions (eg, external FSI masters) |
| 16 | - memory-region = <phandle>; : Reference to the reserved memory for |
| 17 | the ColdFire. Must be 2M aligned on |
| 18 | AST2400 and 1M aligned on AST2500 |
| 19 | - aspeed,sram = <phandle>; : Reference to the SRAM node. |
| 20 | - aspeed,cvic = <phandle>; : Reference to the CVIC node. |
| 21 | |
| 22 | Examples: |
| 23 | |
| 24 | fsi-master { |
| 25 | compatible = "aspeed,ast2500-cf-fsi-master", "fsi-master"; |
| 26 | |
| 27 | clock-gpios = <&gpio 0>; |
| 28 | data-gpios = <&gpio 1>; |
| 29 | enable-gpios = <&gpio 2>; |
| 30 | trans-gpios = <&gpio 3>; |
| 31 | mux-gpios = <&gpio 4>; |
| 32 | |
| 33 | memory-region = <&coldfire_memory>; |
| 34 | aspeed,sram = <&sram>; |
| 35 | aspeed,cvic = <&cvic>; |
| 36 | } |