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1Kernel driver ltc29452=====================3 4Supported chips:5 6 * Linear Technology LTC29457 8 Prefix: 'ltc2945'9 10 Addresses scanned: -11 12 Datasheet:13 14 https://www.analog.com/media/en/technical-documentation/data-sheets/2945fb.pdf15 16Author: Guenter Roeck <linux@roeck-us.net>17 18 19Description20-----------21 22The LTC2945 is a rail-to-rail system monitor that measures current, voltage,23and power consumption.24 25 26Usage Notes27-----------28 29This driver does not probe for LTC2945 devices, since there is no register30which can be safely used to identify the chip. You will have to instantiate31the devices explicitly.32 33Example: the following will load the driver for an LTC2945 at address 0x1034on I2C bus #1::35 36 $ modprobe ltc294537 $ echo ltc2945 0x10 > /sys/bus/i2c/devices/i2c-1/new_device38 39 40Sysfs entries41-------------42 43Voltage readings provided by this driver are reported as obtained from the ADC44registers. If a set of voltage divider resistors is installed, calculate the45real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the46value of the divider resistor against the measured voltage and R2 is the value47of the divider resistor against Ground.48 49Current reading provided by this driver is reported as obtained from the ADC50Current Sense register. The reported value assumes that a 1 mOhm sense resistor51is installed. If a different sense resistor is installed, calculate the real52current by dividing the reported value by the sense resistor value in mOhm.53 54======================= ========================================================55in1_input VIN voltage (mV). Voltage is measured either at56 SENSE+ or VDD pin depending on chip configuration.57in1_min Undervoltage threshold58in1_max Overvoltage threshold59in1_lowest Lowest measured voltage60in1_highest Highest measured voltage61in1_reset_history Write 1 to reset in1 history62in1_min_alarm Undervoltage alarm63in1_max_alarm Overvoltage alarm64 65in2_input ADIN voltage (mV)66in2_min Undervoltage threshold67in2_max Overvoltage threshold68in2_lowest Lowest measured voltage69in2_highest Highest measured voltage70in2_reset_history Write 1 to reset in2 history71in2_min_alarm Undervoltage alarm72in2_max_alarm Overvoltage alarm73 74curr1_input SENSE current (mA)75curr1_min Undercurrent threshold76curr1_max Overcurrent threshold77curr1_lowest Lowest measured current78curr1_highest Highest measured current79curr1_reset_history Write 1 to reset curr1 history80curr1_min_alarm Undercurrent alarm81curr1_max_alarm Overcurrent alarm82 83power1_input Power (in uW). Power is calculated based on SENSE+/VDD84 voltage or ADIN voltage depending on chip configuration.85power1_min Low lower threshold86power1_max High power threshold87power1_input_lowest Historical minimum power use88power1_input_highest Historical maximum power use89power1_reset_history Write 1 to reset power1 history90power1_min_alarm Low power alarm91power1_max_alarm High power alarm92======================= ========================================================93