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authorJean Delvare <khali@linux-fr.org>2005-07-02 18:52:48 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2005-07-11 14:47:41 -0700
commitede7fbdf526c314850c9f32dd8da1753bf8d0ad5 (patch)
tree2f1fefa6f6df58f5c27bf98bd7df0908e97e44ef /Documentation/hwmon/smsc47m1
parent8d5d45fb14680326f833295f2316a4ec5e357220 (diff)
downloadlinux-linaro-stable-ede7fbdf526c314850c9f32dd8da1753bf8d0ad5.tar.gz
[PATCH] I2C: Move hwmon drivers (3/3)
Part 3: Move the drivers documentation, plus two general documentation files. Note that the patch "adds trailing whitespace", because it does move the files as-is, and some files happen to have trailing whitespace. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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+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
+
+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.
+
+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.