0001 Kernel driver ltc4260
0002 =====================
0003
0004 Supported chips:
0005
0006 * Linear Technology LTC4260
0007
0008 Prefix: 'ltc4260'
0009
0010 Addresses scanned: -
0011
0012 Datasheet:
0013
0014 http://cds.linear.com/docs/en/datasheet/4260fc.pdf
0015
0016 Author: Guenter Roeck <linux@roeck-us.net>
0017
0018
0019 Description
0020 -----------
0021
0022 The LTC4260 Hot Swap controller allows a board to be safely inserted
0023 and removed from a live backplane.
0024
0025
0026 Usage Notes
0027 -----------
0028
0029 This driver does not probe for LTC4260 devices, since there is no register
0030 which can be safely used to identify the chip. You will have to instantiate
0031 the devices explicitly.
0032
0033 Example: the following will load the driver for an LTC4260 at address 0x10
0034 on I2C bus #1::
0035
0036 $ modprobe ltc4260
0037 $ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
0038
0039
0040 Sysfs entries
0041 -------------
0042
0043 Voltage readings provided by this driver are reported as obtained from the ADC
0044 registers. If a set of voltage divider resistors is installed, calculate the
0045 real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
0046 value of the divider resistor against the measured voltage and R2 is the value
0047 of the divider resistor against Ground.
0048
0049 Current reading provided by this driver is reported as obtained from the ADC
0050 Current Sense register. The reported value assumes that a 1 mOhm sense resistor
0051 is installed. If a different sense resistor is installed, calculate the real
0052 current by dividing the reported value by the sense resistor value in mOhm.
0053
0054 ======================= =======================
0055 in1_input SOURCE voltage (mV)
0056 in1_min_alarm Undervoltage alarm
0057 in1_max_alarm Overvoltage alarm
0058
0059 in2_input ADIN voltage (mV)
0060 in2_alarm Power bad alarm
0061
0062 curr1_input SENSE current (mA)
0063 curr1_alarm SENSE overcurrent alarm
0064 ======================= =======================
