On Fri 2016-07-15 09:40:52, Pali Roh?r wrote:

On Friday 15 July 2016 09:32:14 Pavel Machek wrote:

quoted

Hi!

Documentation says that load/leds are only visible in the load mode,
but that does not seem to be true (kernel 4.4.0 on N900).

# 1) Legacy interface - enginex_mode, enginex_load and enginex_leds
#  Control interface for the engines:
#    x is 1 .. 3
#      enginex_mode : disabled, load, run
#      enginex_load : microcode load (visible only in load mode)
#      enginex_leds : led mux control (visible only in load mode)

pavel at n900:/sys/class/leds/lp5523:r/device$ ls -al engine*
-rw-r--r-- 1 root root 4096 Jul  6 22:47 engine1_leds
--w------- 1 root root 4096 Jul  6 22:47 engine1_load
-rw-r--r-- 1 root root 4096 Jul  6 23:41 engine1_mode
-rw-r--r-- 1 root root 4096 Jul  6 22:47 engine2_leds
--w------- 1 root root 4096 Jul  6 22:47 engine2_load
-rw-r--r-- 1 root root 4096 Jul  6 23:41 engine2_mode
-rw-r--r-- 1 root root 4096 Jul  6 22:47 engine3_leds
--w------- 1 root root 4096 Jul  6 22:47 engine3_load
-rw-r--r-- 1 root root 4096 Jul  6 22:47 engine3_mode
pavel at n900:/sys/class/leds/lp5523:r/device$ grep . engine*mode
engine1_mode:run
engine2_mode:load
engine3_mode:run
pavel at n900:/sys/class/leds/lp5523:r/device$

On 2.6.28 kernel is present only legacy interface and for this version
is above documentation correct. When engine is in "run" or "disabled",
then sysfs nodes _load and _leds are invisible.

Well, I don't think 2.6.28 is suitable kernel to compare
against... and I don't think hiding sysfs attributes makes any sense.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html