1 What: /sys/kernel/debug/olpc-ec/cmd 1 What: /sys/kernel/debug/olpc-ec/cmd
2 Date: Dec 2011 2 Date: Dec 2011
3 KernelVersion: 3.4 3 KernelVersion: 3.4
4 Contact: devel@lists.laptop.org 4 Contact: devel@lists.laptop.org
5 Description: 5 Description:
6 6
7 A generic interface for executing OLPC Embedde 7 A generic interface for executing OLPC Embedded Controller commands and
8 reading their responses. 8 reading their responses.
9 9
10 To execute a command, write data with the form 10 To execute a command, write data with the format: CC:N A A A A
11 CC is the (hex) command, N is the count of exp 11 CC is the (hex) command, N is the count of expected reply bytes, and A A A A
12 are optional (hex) arguments. 12 are optional (hex) arguments.
13 13
14 To read the response (if any), read from the g 14 To read the response (if any), read from the generic node after executing
15 a command. Hex reply bytes will be returned, * 15 a command. Hex reply bytes will be returned, *whether or not* they came from
16 the immediately previous command. 16 the immediately previous command.
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