Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 Kernel driver ltc2945 2 ===================== 3 4 Supported chips: 5 * Linear Technology LTC2945 6 Prefix: 'ltc2945' 7 Addresses scanned: - 8 Datasheet: 9 http://cds.linear.com/docs/en/datasheet/2945fa.pdf 10 11 Author: Guenter Roeck <linux@roeck-us.net> 12 13 14 Description 15 ----------- 16 17 The LTC2945 is a rail-to-rail system monitor that measures current, voltage, 18 and power consumption. 19 20 21 Usage Notes 22 ----------- 23 24 This driver does not probe for LTC2945 devices, since there is no register 25 which can be safely used to identify the chip. You will have to instantiate 26 the devices explicitly. 27 28 Example: the following will load the driver for an LTC2945 at address 0x10 29 on I2C bus #1: 30 $ modprobe ltc2945 31 $ echo ltc2945 0x10 > /sys/bus/i2c/devices/i2c-1/new_device 32 33 34 Sysfs entries 35 ------------- 36 37 Voltage readings provided by this driver are reported as obtained from the ADC 38 registers. If a set of voltage divider resistors is installed, calculate the 39 real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the 40 value of the divider resistor against the measured voltage and R2 is the value 41 of the divider resistor against Ground. 42 43 Current reading provided by this driver is reported as obtained from the ADC 44 Current Sense register. The reported value assumes that a 1 mOhm sense resistor 45 is installed. If a different sense resistor is installed, calculate the real 46 current by dividing the reported value by the sense resistor value in mOhm. 47 48 in1_input VIN voltage (mV). Voltage is measured either at 49 SENSE+ or VDD pin depending on chip configuration. 50 in1_min Undervoltage threshold 51 in1_max Overvoltage threshold 52 in1_lowest Lowest measured voltage 53 in1_highest Highest measured voltage 54 in1_reset_history Write 1 to reset in1 history 55 in1_min_alarm Undervoltage alarm 56 in1_max_alarm Overvoltage alarm 57 58 in2_input ADIN voltage (mV) 59 in2_min Undervoltage threshold 60 in2_max Overvoltage threshold 61 in2_lowest Lowest measured voltage 62 in2_highest Highest measured voltage 63 in2_reset_history Write 1 to reset in2 history 64 in2_min_alarm Undervoltage alarm 65 in2_max_alarm Overvoltage alarm 66 67 curr1_input SENSE current (mA) 68 curr1_min Undercurrent threshold 69 curr1_max Overcurrent threshold 70 curr1_lowest Lowest measured current 71 curr1_highest Highest measured current 72 curr1_reset_history Write 1 to reset curr1 history 73 curr1_min_alarm Undercurrent alarm 74 curr1_max_alarm Overcurrent alarm 75 76 power1_input Power (in uW). Power is calculated based on SENSE+/VDD 77 voltage or ADIN voltage depending on chip configuration. 78 power1_min Low lower threshold 79 power1_max High power threshold 80 power1_input_lowest Historical minimum power use 81 power1_input_highest Historical maximum power use 82 power1_reset_history Write 1 to reset power1 history 83 power1_min_alarm Low power alarm 84 power1_max_alarm High power alarm