xref: /freebsd/sys/contrib/device-tree/Bindings/ipmi/aspeed-kcs-bmc.txt (revision 59c8e88e72633afbc47a4ace0d2170d00d51f7dc) 
1# Aspeed KCS (Keyboard Controller Style) IPMI interface
2
3The Aspeed SOCs (AST2400 and AST2500) are commonly used as BMCs
4(Baseboard Management Controllers) and the KCS interface can be
5used to perform in-band IPMI communication with their host.
6
7## v1
8Required properties:
9- compatible : should be one of
10    "aspeed,ast2400-kcs-bmc"
11    "aspeed,ast2500-kcs-bmc"
12- interrupts : interrupt generated by the controller
13- kcs_chan : The LPC channel number in the controller
14- kcs_addr : The host CPU IO map address
15
16## v2
17Required properties:
18- compatible : should be one of
19    "aspeed,ast2400-kcs-bmc-v2"
20    "aspeed,ast2500-kcs-bmc-v2"
21- reg : The address and size of the IDR, ODR and STR registers
22- interrupts : interrupt generated by the controller
23- aspeed,lpc-io-reg : The host CPU LPC IO address for the device
24
25Example:
26
27    kcs3: kcs@24 {
28        compatible = "aspeed,ast2500-kcs-bmc-v2";
29        reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
30        aspeed,lpc-reg = <0xca2>;
31        interrupts = <8>;
32        status = "okay";
33    };
34