ltc4260.rst (1781B)
1Kernel driver ltc4260 2===================== 3 4Supported chips: 5 6 * Linear Technology LTC4260 7 8 Prefix: 'ltc4260' 9 10 Addresses scanned: - 11 12 Datasheet: 13 14 http://cds.linear.com/docs/en/datasheet/4260fc.pdf 15 16Author: Guenter Roeck <linux@roeck-us.net> 17 18 19Description 20----------- 21 22The LTC4260 Hot Swap controller allows a board to be safely inserted 23and removed from a live backplane. 24 25 26Usage Notes 27----------- 28 29This driver does not probe for LTC4260 devices, since there is no register 30which can be safely used to identify the chip. You will have to instantiate 31the devices explicitly. 32 33Example: the following will load the driver for an LTC4260 at address 0x10 34on I2C bus #1:: 35 36 $ modprobe ltc4260 37 $ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device 38 39 40Sysfs entries 41------------- 42 43Voltage readings provided by this driver are reported as obtained from the ADC 44registers. If a set of voltage divider resistors is installed, calculate the 45real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the 46value of the divider resistor against the measured voltage and R2 is the value 47of the divider resistor against Ground. 48 49Current reading provided by this driver is reported as obtained from the ADC 50Current Sense register. The reported value assumes that a 1 mOhm sense resistor 51is installed. If a different sense resistor is installed, calculate the real 52current by dividing the reported value by the sense resistor value in mOhm. 53 54======================= ======================= 55in1_input SOURCE voltage (mV) 56in1_min_alarm Undervoltage alarm 57in1_max_alarm Overvoltage alarm 58 59in2_input ADIN voltage (mV) 60in2_alarm Power bad alarm 61 62curr1_input SENSE current (mA) 63curr1_alarm SENSE overcurrent alarm 64======================= =======================