1*4882a593SmuzhiyunKernel driver ltc4215 2*4882a593Smuzhiyun===================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunSupported chips: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun * Linear Technology LTC4215 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun Prefix: 'ltc4215' 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun Addresses scanned: 0x44 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun Datasheet: 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunAuthor: Ira W. Snyder <iws@ovro.caltech.edu> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunDescription 20*4882a593Smuzhiyun----------- 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunThe LTC4215 controller allows a board to be safely inserted and removed 23*4882a593Smuzhiyunfrom a live backplane. 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunUsage Notes 27*4882a593Smuzhiyun----------- 28*4882a593Smuzhiyun 29*4882a593SmuzhiyunThis driver does not probe for LTC4215 devices, due to the fact that some 30*4882a593Smuzhiyunof the possible addresses are unfriendly to probing. You will have to 31*4882a593Smuzhiyuninstantiate the devices explicitly. 32*4882a593Smuzhiyun 33*4882a593SmuzhiyunExample: the following will load the driver for an LTC4215 at address 0x44 34*4882a593Smuzhiyunon I2C bus #0:: 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun $ modprobe ltc4215 37*4882a593Smuzhiyun $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun 40*4882a593SmuzhiyunSysfs entries 41*4882a593Smuzhiyun------------- 42*4882a593Smuzhiyun 43*4882a593SmuzhiyunThe LTC4215 has built-in limits for overvoltage, undervoltage, and 44*4882a593Smuzhiyunundercurrent warnings. This makes it very likely that the reference 45*4882a593Smuzhiyuncircuit will be used. 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun======================= ========================= 48*4882a593Smuzhiyunin1_input input voltage 49*4882a593Smuzhiyunin2_input output voltage 50*4882a593Smuzhiyun 51*4882a593Smuzhiyunin1_min_alarm input undervoltage alarm 52*4882a593Smuzhiyunin1_max_alarm input overvoltage alarm 53*4882a593Smuzhiyun 54*4882a593Smuzhiyuncurr1_input current 55*4882a593Smuzhiyuncurr1_max_alarm overcurrent alarm 56*4882a593Smuzhiyun 57*4882a593Smuzhiyunpower1_input power usage 58*4882a593Smuzhiyunpower1_alarm power bad alarm 59*4882a593Smuzhiyun======================= ========================= 60