Revision 6326fec1122cde256bd2a8c63f2606e08e44ce1d authored by Nicholas Piggin on 25 December 2016, 03:00:29 UTC, committed by Linus Torvalds on 25 December 2016, 19:54:48 UTC
A page is not added to the swap cache without being swap backed, so PageSwapBacked mappings can use PG_owner_priv_1 for PageSwapCache. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Andrew Lutomirski <luto@kernel.org> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 7c0f6ba
leds-blinkm.txt
The leds-blinkm driver supports the devices of the BlinkM family.
They are RGB-LED modules driven by a (AT)tiny microcontroller and
communicate through I2C. The default address of these modules is
0x09 but this can be changed through a command. By this you could
dasy-chain up to 127 BlinkMs on an I2C bus.
The device accepts RGB and HSB color values through separate commands.
Also you can store blinking sequences as "scripts" in
the controller and run them. Also fading is an option.
The interface this driver provides is 2-fold:
a) LED class interface for use with triggers
############################################
The registration follows the scheme:
blinkm-<i2c-bus-nr>-<i2c-device-nr>-<color>
$ ls -h /sys/class/leds/blinkm-6-*
/sys/class/leds/blinkm-6-9-blue:
brightness device max_brightness power subsystem trigger uevent
/sys/class/leds/blinkm-6-9-green:
brightness device max_brightness power subsystem trigger uevent
/sys/class/leds/blinkm-6-9-red:
brightness device max_brightness power subsystem trigger uevent
(same is /sys/bus/i2c/devices/6-0009/leds)
We can control the colors separated into red, green and blue and
assign triggers on each color.
E.g.:
$ cat blinkm-6-9-blue/brightness
05
$ echo 200 > blinkm-6-9-blue/brightness
$
$ modprobe ledtrig-heartbeat
$ echo heartbeat > blinkm-6-9-green/trigger
$
b) Sysfs group to control rgb, fade, hsb, scripts ...
#####################################################
This extended interface is available as folder blinkm
in the sysfs folder of the I2C device.
E.g. below /sys/bus/i2c/devices/6-0009/blinkm
$ ls -h /sys/bus/i2c/devices/6-0009/blinkm/
blue green red test
Currently supported is just setting red, green, blue
and a test sequence.
E.g.:
$ cat *
00
00
00
#Write into test to start test sequence!#
$ echo 1 > test
$
$ echo 255 > red
$
as of 6/2012
dl9pf <at> gmx <dot> de
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...