summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt')
-rw-r--r--Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt33
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt b/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
new file mode 100644
index 000000000..193e71ca9
--- /dev/null
+++ b/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
@@ -0,0 +1,33 @@
+# Aspeed KCS (Keyboard Controller Style) IPMI interface
+
+The Aspeed SOCs (AST2400 and AST2500) are commonly used as BMCs
+(Baseboard Management Controllers) and the KCS interface can be
+used to perform in-band IPMI communication with their host.
+
+## v1
+Required properties:
+- compatible : should be one of
+ "aspeed,ast2400-kcs-bmc"
+ "aspeed,ast2500-kcs-bmc"
+- interrupts : interrupt generated by the controller
+- kcs_chan : The LPC channel number in the controller
+- kcs_addr : The host CPU IO map address
+
+## v2
+Required properties:
+- compatible : should be one of
+ "aspeed,ast2400-kcs-bmc-v2"
+ "aspeed,ast2500-kcs-bmc-v2"
+- reg : The address and size of the IDR, ODR and STR registers
+- interrupts : interrupt generated by the controller
+- aspeed,lpc-io-reg : The host CPU LPC IO address for the device
+
+Example:
+
+ kcs3: kcs@24 {
+ compatible = "aspeed,ast2500-kcs-bmc-v2";
+ reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
+ aspeed,lpc-reg = <0xca2>;
+ interrupts = <8>;
+ status = "okay";
+ };