mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-31 06:14:39 +01:00
Daniel Drake
a3c8121b87
Add a debugfs interface for sending commands to the OLPC Embedded Controller (EC) and reading the responses. The EC provides functionality for machine identification, battery and AC control, wakeup control, etc. Having a debugfs interface available is useful for EC development and debugging. Based on code by Paul Fox (who also approves of the end result). Signed-off-by: Daniel Drake <[email protected]> Acked-by: Paul Fox <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Andres Salomon <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
17 lines
572 B
Plaintext
17 lines
572 B
Plaintext
What: /sys/kernel/debug/olpc-ec/cmd
|
|
Date: Dec 2011
|
|
KernelVersion: 3.4
|
|
Contact: [email protected]
|
|
Description:
|
|
|
|
A generic interface for executing OLPC Embedded Controller commands and
|
|
reading their responses.
|
|
|
|
To execute a command, write data with the format: CC:N A A A A
|
|
CC is the (hex) command, N is the count of expected reply bytes, and A A A A
|
|
are optional (hex) arguments.
|
|
|
|
To read the response (if any), read from the generic node after executing
|
|
a command. Hex reply bytes will be returned, *whether or not* they came from
|
|
the immediately previous command.
|