iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

greybus: interface: fix power_state documentation

Browse Source 
Reword the power_state attribute documentation to make it clear that an
attempt to boot and possibly enumerate an interface is made when writing
"on" to the file, and that on errors the interface will again be powered
down.

Drop the incorrect claim that writing the currently read value has no
effect, since no such guarantees can be made (e.g. several writers may
be sleeping on the interface mutex).

Also fix some minor language issues.

Reviewed-by: Sandeep Patil <sspatil@google.com>
Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Patrick Titiano <ptitiano@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Johan Hovold 2016-07-20 16:40:26 +02:00 committed by Greg Kroah-Hartman
parent 93e29c8530
commit e21e6bad3f
1 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/staging/greybus/Documentation/sysfs-bus-greybus
View File

@ -102,17 +102,18 @@ Date: March 2016
KernelVersion: 4.XX
Contact: Greg Kroah-Hartman <greg@kroah.com>
Description:
This reflects the power state of a Greybus Interface. If the
value read from it is "on", then power is currently supplied to
the Interface. Otherwise this will read "off" and the power is
currently not supplied to the Interface.
This file reflects the power state of a Greybus interface. If
the value read from it is "on", then power is currently
supplied to the interface. Otherwise it will read "off" and
power is currently not supplied to the interface.
If the value read is "off", then writing "on" (or '1', 'y',
'Y') to it will enable power to the Interface. If the value
read is "on", then writing "off" (or '0', 'n', 'N') to it will
disable power to the Interface.
'Y') to this file will enable power to the interface and an
attempt to boot and possibly enumerate it will be made. Note
that on errors, the interface will again be powered down.
Writing the currently read value to it has no effect.
If the value read is "on", then writing "off" (or '0', 'n',
'N') to this file will power down the interface.
What: /sys/bus/greybus/devices/N-M.I/product_id
Date: October 2015