1Kernel driver ltc4245 2===================== 3 4Supported chips: 5 * Linear Technology LTC4245 6 Prefix: 'ltc4245' 7 Addresses scanned: 0x20-0x3f 8 Datasheet: 9 http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1140,P19392,D13517 10 11Author: Ira W. Snyder <iws@ovro.caltech.edu> 12 13 14Description 15----------- 16 17The LTC4245 controller allows a board to be safely inserted and removed 18from a live backplane in multiple supply systems such as CompactPCI and 19PCI Express. 20 21 22Usage Notes 23----------- 24 25This driver does not probe for LTC4245 devices, due to the fact that some 26of the possible addresses are unfriendly to probing. You will need to use 27the "force" parameter to tell the driver where to find the device. 28 29Example: the following will load the driver for an LTC4245 at address 0x23 30on I2C bus #1: 31$ modprobe ltc4245 force=1,0x23 32 33 34Sysfs entries 35------------- 36 37The LTC4245 has built-in limits for over and under current warnings. This 38makes it very likely that the reference circuit will be used. 39 40This driver uses the values in the datasheet to change the register values 41into the values specified in the sysfs-interface document. The current readings 42rely on the sense resistors listed in Table 2: "Sense Resistor Values". 43 44in1_input 12v input voltage (mV) 45in2_input 5v input voltage (mV) 46in3_input 3v input voltage (mV) 47in4_input Vee (-12v) input voltage (mV) 48 49in1_min_alarm 12v input undervoltage alarm 50in2_min_alarm 5v input undervoltage alarm 51in3_min_alarm 3v input undervoltage alarm 52in4_min_alarm Vee (-12v) input undervoltage alarm 53 54curr1_input 12v current (mA) 55curr2_input 5v current (mA) 56curr3_input 3v current (mA) 57curr4_input Vee (-12v) current (mA) 58 59curr1_max_alarm 12v overcurrent alarm 60curr2_max_alarm 5v overcurrent alarm 61curr3_max_alarm 3v overcurrent alarm 62curr4_max_alarm Vee (-12v) overcurrent alarm 63 64in5_input 12v output voltage (mV) 65in6_input 5v output voltage (mV) 66in7_input 3v output voltage (mV) 67in8_input Vee (-12v) output voltage (mV) 68 69in5_min_alarm 12v output undervoltage alarm 70in6_min_alarm 5v output undervoltage alarm 71in7_min_alarm 3v output undervoltage alarm 72in8_min_alarm Vee (-12v) output undervoltage alarm 73 74in9_input GPIO #1 voltage data 75in10_input GPIO #2 voltage data 76in11_input GPIO #3 voltage data 77 78power1_input 12v power usage (mW) 79power2_input 5v power usage (mW) 80power3_input 3v power usage (mW) 81power4_input Vee (-12v) power usage (mW) 82