69e1ded651
LTC4260 is a Positive Voltage Hot Swap Controller. The driver currently only supports voltage monitoring, not voltage control. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
56 lines
1.6 KiB
Text
56 lines
1.6 KiB
Text
Kernel driver ltc4260
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=====================
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Supported chips:
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* Linear Technology LTC4260
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Prefix: 'ltc4260'
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Addresses scanned: -
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Datasheet:
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http://cds.linear.com/docs/en/datasheet/4260fc.pdf
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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The LTC4260 Hot Swap controller allows a board to be safely inserted
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and removed from a live backplane.
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Usage Notes
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-----------
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This driver does not probe for LTC4260 devices, since there is no register
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which can be safely used to identify the chip. You will have to instantiate
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the devices explicitly.
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Example: the following will load the driver for an LTC4260 at address 0x10
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on I2C bus #1:
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$ modprobe ltc4260
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$ echo ltc4260 0x10 > /sys/bus/i2c/devices/i2c-1/new_device
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Sysfs entries
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-------------
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Voltage readings provided by this driver are reported as obtained from the ADC
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registers. If a set of voltage divider resistors is installed, calculate the
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real voltage by multiplying the reported value with (R1+R2)/R2, where R1 is the
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value of the divider resistor against the measured voltage and R2 is the value
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of the divider resistor against Ground.
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Current reading provided by this driver is reported as obtained from the ADC
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Current Sense register. The reported value assumes that a 1 mOhm sense resistor
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is installed. If a different sense resistor is installed, calculate the real
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current by dividing the reported value by the sense resistor value in mOhm.
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in1_input SOURCE voltage (mV)
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in1_min_alarm Undervoltage alarm
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in1_max_alarm Overvoltage alarm
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in2_input ADIN voltage (mV)
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in2_alarm Power bad alarm
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curr1_input SENSE current (mA)
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curr1_alarm SENSE overcurrent alarm
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