2014-01-11 16:17:05 +08:00
|
|
|
Kernel driver ltc4260
|
|
|
|
|
=====================
|
|
|
|
|
|
|
|
|
|
Supported chips:
|
2019-04-17 17:46:28 +08:00
|
|
|
|
2014-01-11 16:17:05 +08:00
|
|
|
* Linear Technology LTC4260
|
2019-04-17 17:46:28 +08:00
|
|
|
|
2014-01-11 16:17:05 +08:00
|
|
|
Prefix: 'ltc4260'
|
2019-04-17 17:46:28 +08:00
|
|
|
|
2014-01-11 16:17:05 +08:00
|
|
|
Addresses scanned: -
|
2019-04-17 17:46:28 +08:00
|
|
|
|
2014-01-11 16:17:05 +08:00
|
|
|
Datasheet:
|
2019-04-17 17:46:28 +08:00
|
|
|
|
|
|
|
|
http://cds.linear.com/docs/en/datasheet/4260fc.pdf
|
2014-01-11 16:17:05 +08:00
|
|
|
|
|
|
|
|
Author: Guenter Roeck <linux@roeck-us.net>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Description
|
|
|
|
|
-----------
|
|
|
|
|
|
|
|
|
|
The LTC4260 Hot Swap controller allows a board to be safely inserted
|
|
|
|
|
and removed from a live backplane.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Usage Notes
|
|
|
|
|
-----------
|
|
|
|
|
|
|
|
|
|
This driver does not probe for LTC4260 devices, since there is no register
|
|
|
|
|
which can be safely used to identify the chip. You will have to instantiate
|
|
|
|
|
the devices explicitly.
|
|
|
|
|
|
|
|
|
|
Example: the following will load the driver for an LTC4260 at address 0x10
|
2019-04-17 17:46:28 +08:00
|
|
|
on I2C bus #1::
|
|
|
|
|
|
|
|
|
|
$ modprobe ltc4260
|
|
|
|
|
$ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
|
2014-01-11 16:17:05 +08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
Sysfs entries
|
|
|
|
|
-------------
|
|
|
|
|
|
|
|
|
|
Voltage readings provided by this driver are reported as obtained from the ADC
|
|
|
|
|
registers. If a set of voltage divider resistors is installed, calculate the
|
|
|
|
|
real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
|
|
|
|
|
value of the divider resistor against the measured voltage and R2 is the value
|
|
|
|
|
of the divider resistor against Ground.
|
|
|
|
|
|
|
|
|
|
Current reading provided by this driver is reported as obtained from the ADC
|
|
|
|
|
Current Sense register. The reported value assumes that a 1 mOhm sense resistor
|
|
|
|
|
is installed. If a different sense resistor is installed, calculate the real
|
|
|
|
|
current by dividing the reported value by the sense resistor value in mOhm.
|
|
|
|
|
|
2019-04-17 17:46:28 +08:00
|
|
|
======================= =======================
|
2014-01-11 16:17:05 +08:00
|
|
|
in1_input SOURCE voltage (mV)
|
|
|
|
|
in1_min_alarm Undervoltage alarm
|
|
|
|
|
in1_max_alarm Overvoltage alarm
|
|
|
|
|
|
|
|
|
|
in2_input ADIN voltage (mV)
|
|
|
|
|
in2_alarm Power bad alarm
|
|
|
|
|
|
|
|
|
|
curr1_input SENSE current (mA)
|
|
|
|
|
curr1_alarm SENSE overcurrent alarm
|
2019-04-17 17:46:28 +08:00
|
|
|
======================= =======================
|
