ltc4260 1.6 KB

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