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1Kernel driver smsc47m12======================3 4Supported chips:5 6 * SMSC LPC47B27x, LPC47M112, LPC47M10x, LPC47M13x, LPC47M14x,7 8 LPC47M15x and LPC47M1929 10 Addresses scanned: none, address read from Super I/O config space11 12 Prefix: 'smsc47m1'13 14 Datasheets:15 16 http://www.smsc.com/media/Downloads_Public/Data_Sheets/47b272.pdf17 18 http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m10x.pdf19 20 http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m112.pdf21 22 http://www.smsc.com/23 24 * SMSC LPC47M29225 26 Addresses scanned: none, address read from Super I/O config space27 28 Prefix: 'smsc47m2'29 30 Datasheet: Not public31 32 * SMSC LPC47M99733 34 Addresses scanned: none, address read from Super I/O config space35 36 Prefix: 'smsc47m1'37 38 Datasheet: none39 40 41 42Authors:43 44 - Mark D. Studebaker <mdsxyz123@yahoo.com>,45 - With assistance from Bruce Allen <ballen@uwm.edu>, and his46 fan.c program:47 48 - http://www.lsc-group.phys.uwm.edu/%7Eballen/driver/49 50 - Gabriele Gorla <gorlik@yahoo.com>,51 - Jean Delvare <jdelvare@suse.de>52 53Description54-----------55 56The Standard Microsystems Corporation (SMSC) 47M1xx Super I/O chips57contain monitoring and PWM control circuitry for two fans.58 59The LPC47M15x, LPC47M192 and LPC47M292 chips contain a full 'hardware60monitoring block' in addition to the fan monitoring and control. The61hardware monitoring block is not supported by this driver, use the62smsc47m192 driver for that.63 64No documentation is available for the 47M997, but it has the same device65ID as the 47M15x and 47M192 chips and seems to be compatible.66 67Fan rotation speeds are reported in RPM (rotations per minute). An alarm is68triggered if the rotation speed has dropped below a programmable limit. Fan69readings can be divided by a programmable divider (1, 2, 4 or 8) to give70the readings more range or accuracy. Not all RPM values can accurately be71represented, so some rounding is done. With a divider of 2, the lowest72representable value is around 2600 RPM.73 74PWM values are from 0 to 255.75 76If an alarm triggers, it will remain triggered until the hardware register77is read at least once. This means that the cause for the alarm may78already have disappeared! Note that in the current implementation, all79hardware registers are read whenever any data is read (unless it is less80than 1.5 seconds since the last update). This means that you can easily81miss once-only alarms.82 83------------------------------------------------------------------84 85The lm_sensors project gratefully acknowledges the support of86Intel in the development of this driver.87