mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
b890a07f7b
The SMSC LPC47M997 Super-I/O chip seems to be compatible with the LPC47M192, so it is supported by the smsc47m1 driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
60 lines
2.4 KiB
Plaintext
60 lines
2.4 KiB
Plaintext
Kernel driver smsc47m1
|
|
======================
|
|
|
|
Supported chips:
|
|
* SMSC LPC47B27x, LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x and LPC47M192
|
|
Addresses scanned: none, address read from Super I/O config space
|
|
Prefix: 'smsc47m1'
|
|
Datasheets:
|
|
http://www.smsc.com/main/datasheets/47b27x.pdf
|
|
http://www.smsc.com/main/datasheets/47m10x.pdf
|
|
http://www.smsc.com/main/tools/discontinued/47m13x.pdf
|
|
http://www.smsc.com/main/datasheets/47m14x.pdf
|
|
http://www.smsc.com/main/tools/discontinued/47m15x.pdf
|
|
http://www.smsc.com/main/datasheets/47m192.pdf
|
|
* SMSC LPC47M997
|
|
Addresses scanned: none, address read from Super I/O config space
|
|
Prefix: 'smsc47m1'
|
|
Datasheet: none
|
|
|
|
Authors:
|
|
Mark D. Studebaker <mdsxyz123@yahoo.com>,
|
|
With assistance from Bruce Allen <ballen@uwm.edu>, and his
|
|
fan.c program: http://www.lsc-group.phys.uwm.edu/%7Eballen/driver/
|
|
Gabriele Gorla <gorlik@yahoo.com>,
|
|
Jean Delvare <khali@linux-fr.org>
|
|
|
|
Description
|
|
-----------
|
|
|
|
The Standard Microsystems Corporation (SMSC) 47M1xx Super I/O chips
|
|
contain monitoring and PWM control circuitry for two fans.
|
|
|
|
The 47M15x and 47M192 chips contain a full 'hardware monitoring block'
|
|
in addition to the fan monitoring and control. The hardware monitoring
|
|
block is not supported by the driver.
|
|
|
|
No documentation is available for the 47M997, but it has the same device
|
|
ID as the 47M15x and 47M192 chips and seems to be compatible.
|
|
|
|
Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
|
|
triggered if the rotation speed has dropped below a programmable limit. Fan
|
|
readings can be divided by a programmable divider (1, 2, 4 or 8) to give
|
|
the readings more range or accuracy. Not all RPM values can accurately be
|
|
represented, so some rounding is done. With a divider of 2, the lowest
|
|
representable value is around 2600 RPM.
|
|
|
|
PWM values are from 0 to 255.
|
|
|
|
If an alarm triggers, it will remain triggered until the hardware register
|
|
is read at least once. This means that the cause for the alarm may
|
|
already have disappeared! Note that in the current implementation, all
|
|
hardware registers are read whenever any data is read (unless it is less
|
|
than 1.5 seconds since the last update). This means that you can easily
|
|
miss once-only alarms.
|
|
|
|
|
|
**********************
|
|
The lm_sensors project gratefully acknowledges the support of
|
|
Intel in the development of this driver.
|