1*4882a593SmuzhiyunKernel driver smsc47m1 2*4882a593Smuzhiyun====================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun * SMSC LPC47B27x, LPC47M112, LPC47M10x, LPC47M13x, LPC47M14x, 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun LPC47M15x and LPC47M192 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun Addresses scanned: none, address read from Super I/O config space 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun Prefix: 'smsc47m1' 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun Datasheets: 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun http://www.smsc.com/media/Downloads_Public/Data_Sheets/47b272.pdf 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m10x.pdf 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m112.pdf 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun http://www.smsc.com/ 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun * SMSC LPC47M292 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun Addresses scanned: none, address read from Super I/O config space 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun Prefix: 'smsc47m2' 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun Datasheet: Not public 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun * SMSC LPC47M997 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun Addresses scanned: none, address read from Super I/O config space 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun Prefix: 'smsc47m1' 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun Datasheet: none 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunAuthors: 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun - Mark D. Studebaker <mdsxyz123@yahoo.com>, 45*4882a593Smuzhiyun - With assistance from Bruce Allen <ballen@uwm.edu>, and his 46*4882a593Smuzhiyun fan.c program: 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun - http://www.lsc-group.phys.uwm.edu/%7Eballen/driver/ 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun - Gabriele Gorla <gorlik@yahoo.com>, 51*4882a593Smuzhiyun - Jean Delvare <jdelvare@suse.de> 52*4882a593Smuzhiyun 53*4882a593SmuzhiyunDescription 54*4882a593Smuzhiyun----------- 55*4882a593Smuzhiyun 56*4882a593SmuzhiyunThe Standard Microsystems Corporation (SMSC) 47M1xx Super I/O chips 57*4882a593Smuzhiyuncontain monitoring and PWM control circuitry for two fans. 58*4882a593Smuzhiyun 59*4882a593SmuzhiyunThe LPC47M15x, LPC47M192 and LPC47M292 chips contain a full 'hardware 60*4882a593Smuzhiyunmonitoring block' in addition to the fan monitoring and control. The 61*4882a593Smuzhiyunhardware monitoring block is not supported by this driver, use the 62*4882a593Smuzhiyunsmsc47m192 driver for that. 63*4882a593Smuzhiyun 64*4882a593SmuzhiyunNo documentation is available for the 47M997, but it has the same device 65*4882a593SmuzhiyunID as the 47M15x and 47M192 chips and seems to be compatible. 66*4882a593Smuzhiyun 67*4882a593SmuzhiyunFan rotation speeds are reported in RPM (rotations per minute). An alarm is 68*4882a593Smuzhiyuntriggered if the rotation speed has dropped below a programmable limit. Fan 69*4882a593Smuzhiyunreadings can be divided by a programmable divider (1, 2, 4 or 8) to give 70*4882a593Smuzhiyunthe readings more range or accuracy. Not all RPM values can accurately be 71*4882a593Smuzhiyunrepresented, so some rounding is done. With a divider of 2, the lowest 72*4882a593Smuzhiyunrepresentable value is around 2600 RPM. 73*4882a593Smuzhiyun 74*4882a593SmuzhiyunPWM values are from 0 to 255. 75*4882a593Smuzhiyun 76*4882a593SmuzhiyunIf an alarm triggers, it will remain triggered until the hardware register 77*4882a593Smuzhiyunis read at least once. This means that the cause for the alarm may 78*4882a593Smuzhiyunalready have disappeared! Note that in the current implementation, all 79*4882a593Smuzhiyunhardware registers are read whenever any data is read (unless it is less 80*4882a593Smuzhiyunthan 1.5 seconds since the last update). This means that you can easily 81*4882a593Smuzhiyunmiss once-only alarms. 82*4882a593Smuzhiyun 83*4882a593Smuzhiyun------------------------------------------------------------------ 84*4882a593Smuzhiyun 85*4882a593SmuzhiyunThe lm_sensors project gratefully acknowledges the support of 86*4882a593SmuzhiyunIntel in the development of this driver. 87