0ea6e61122
Below you will find an updated version from the original series bunching all patches into one big patch updating broken web addresses that are located in Documentation/* Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult, the best way to deal with these is to use web.archive.org to locate these addresses that are outdated. Now there are also some addresses pointing to .spec files some are located, but some(after searching on the companies site)where still no where to be found. In this case I just changed the address to the company site this way the users can contact the company and they can locate them for the users. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Paulo Marques <pmarques@grupopie.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Michael Neuling <mikey@neuling.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
36 lines
1.3 KiB
Text
36 lines
1.3 KiB
Text
Kernel driver g760a
|
|
===================
|
|
|
|
Supported chips:
|
|
* Global Mixed-mode Technology Inc. G760A
|
|
Prefix: 'g760a'
|
|
Datasheet: Publicly available at the GMT website
|
|
http://www.gmt.com.tw/product/datasheet/EDS-760A.pdf
|
|
|
|
Author: Herbert Valerio Riedel <hvr@gnu.org>
|
|
|
|
Description
|
|
-----------
|
|
|
|
The GMT G760A Fan Speed PWM Controller is connected directly to a fan
|
|
and performs closed-loop control of the fan speed.
|
|
|
|
The fan speed is programmed by setting the period via 'pwm1' of two
|
|
consecutive speed pulses. The period is defined in terms of clock
|
|
cycle counts of an assumed 32kHz clock source.
|
|
|
|
Setting a period of 0 stops the fan; setting the period to 255 sets
|
|
fan to maximum speed.
|
|
|
|
The measured fan rotation speed returned via 'fan1_input' is derived
|
|
from the measured speed pulse period by assuming again a 32kHz clock
|
|
source and a 2 pulse-per-revolution fan.
|
|
|
|
The 'alarms' file provides access to the two alarm bits provided by
|
|
the G760A chip's status register: Bit 0 is set when the actual fan
|
|
speed differs more than 20% with respect to the programmed fan speed;
|
|
bit 1 is set when fan speed is below 1920 RPM.
|
|
|
|
The g760a driver will not update its values more frequently than every
|
|
other second; reading them more often will do no harm, but will return
|
|
'old' values.
|