1Kernel driver ltc2978 2===================== 3 4Supported chips: 5 * Linear Technology LTC2978 6 Prefix: 'ltc2978' 7 Addresses scanned: - 8 Datasheet: http://cds.linear.com/docs/Datasheet/2978fa.pdf 9 * Linear Technology LTC3880 10 Prefix: 'ltc3880' 11 Addresses scanned: - 12 Datasheet: http://cds.linear.com/docs/Datasheet/3880f.pdf 13 14Author: Guenter Roeck <guenter.roeck@ericsson.com> 15 16 17Description 18----------- 19 20The LTC2978 is an octal power supply monitor, supervisor, sequencer and 21margin controller. The LTC3880 is a dual, PolyPhase DC/DC synchronous 22step-down switching regulator controller. 23 24 25Usage Notes 26----------- 27 28This driver does not probe for PMBus devices. You will have to instantiate 29devices explicitly. 30 31Example: the following commands will load the driver for an LTC2978 at address 320x60 on I2C bus #1: 33 34# modprobe ltc2978 35# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device 36 37 38Sysfs attributes 39---------------- 40 41in1_label "vin" 42in1_input Measured input voltage. 43in1_min Minimum input voltage. 44in1_max Maximum input voltage. 45in1_lcrit Critical minimum input voltage. 46in1_crit Critical maximum input voltage. 47in1_min_alarm Input voltage low alarm. 48in1_max_alarm Input voltage high alarm. 49in1_lcrit_alarm Input voltage critical low alarm. 50in1_crit_alarm Input voltage critical high alarm. 51in1_lowest Lowest input voltage. LTC2978 only. 52in1_highest Highest input voltage. 53in1_reset_history Reset history. Writing into this attribute will reset 54 history for all attributes. 55 56in[2-9]_label "vout[1-8]". Channels 3 to 9 on LTC2978 only. 57in[2-9]_input Measured output voltage. 58in[2-9]_min Minimum output voltage. 59in[2-9]_max Maximum output voltage. 60in[2-9]_lcrit Critical minimum output voltage. 61in[2-9]_crit Critical maximum output voltage. 62in[2-9]_min_alarm Output voltage low alarm. 63in[2-9]_max_alarm Output voltage high alarm. 64in[2-9]_lcrit_alarm Output voltage critical low alarm. 65in[2-9]_crit_alarm Output voltage critical high alarm. 66in[2-9]_lowest Lowest output voltage. LTC2978 only. 67in[2-9]_highest Lowest output voltage. 68in[2-9]_reset_history Reset history. Writing into this attribute will reset 69 history for all attributes. 70 71temp[1-3]_input Measured temperature. 72 On LTC2978, only one temperature measurement is 73 supported and reflects the internal temperature. 74 On LTC3880, temp1 and temp2 report external 75 temperatures, and temp3 reports the internal 76 temperature. 77temp[1-3]_min Mimimum temperature. 78temp[1-3]_max Maximum temperature. 79temp[1-3]_lcrit Critical low temperature. 80temp[1-3]_crit Critical high temperature. 81temp[1-3]_min_alarm Chip temperature low alarm. 82temp[1-3]_max_alarm Chip temperature high alarm. 83temp[1-3]_lcrit_alarm Chip temperature critical low alarm. 84temp[1-3]_crit_alarm Chip temperature critical high alarm. 85temp[1-3]_lowest Lowest measured temperature. LTC2978 only. 86temp[1-3]_highest Highest measured temperature. 87temp[1-3]_reset_history Reset history. Writing into this attribute will reset 88 history for all attributes. 89 90power[1-2]_label "pout[1-2]". LTC3880 only. 91power[1-2]_input Measured power. 92 93curr1_label "iin". LTC3880 only. 94curr1_input Measured input current. 95curr1_max Maximum input current. 96curr1_max_alarm Input current high alarm. 97 98curr[2-3]_label "iout[1-2]". LTC3880 only. 99curr[2-3]_input Measured input current. 100curr[2-3]_max Maximum input current. 101curr[2-3]_crit Critical input current. 102curr[2-3]_max_alarm Input current high alarm. 103curr[2-3]_crit_alarm Input current critical high alarm. 104