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Kernel driver ltc2978
=====================
Supported chips:
* Linear Technology LTC2978
Prefix: 'ltc2978'
Addresses scanned: -
Datasheet: http://cds.linear.com/docs/Datasheet/2978fa.pdf
* Linear Technology LTC3880
Prefix: 'ltc3880'
Addresses scanned: -
Datasheet: http://cds.linear.com/docs/Datasheet/3880f.pdf
Author: Guenter Roeck <guenter.roeck@ericsson.com>
Description
-----------
The LTC2978 is an octal power supply monitor, supervisor, sequencer and
margin controller. The LTC3880 is a dual, PolyPhase DC/DC synchronous
step-down switching regulator controller.
Usage Notes
-----------
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Example: the following commands will load the driver for an LTC2978 at address
0x60 on I2C bus #1:
# modprobe ltc2978
# echo ltc2978 0x60 > /sys/bus/i2c/devices/i2c-1/new_device
Sysfs attributes
----------------
in1_label "vin"
in1_input Measured input voltage.
in1_min Minimum input voltage.
in1_max Maximum input voltage.
in1_lcrit Critical minimum input voltage.
in1_crit Critical maximum input voltage.
in1_min_alarm Input voltage low alarm.
in1_max_alarm Input voltage high alarm.
in1_lcrit_alarm Input voltage critical low alarm.
in1_crit_alarm Input voltage critical high alarm.
in1_lowest Lowest input voltage. LTC2978 only.
in1_highest Highest input voltage.
in1_reset_history Reset history. Writing into this attribute will reset
history for all attributes.
in[2-9]_label "vout[1-8]". Channels 3 to 9 on LTC2978 only.
in[2-9]_input Measured output voltage.
in[2-9]_min Minimum output voltage.
in[2-9]_max Maximum output voltage.
in[2-9]_lcrit Critical minimum output voltage.
in[2-9]_crit Critical maximum output voltage.
in[2-9]_min_alarm Output voltage low alarm.
in[2-9]_max_alarm Output voltage high alarm.
in[2-9]_lcrit_alarm Output voltage critical low alarm.
in[2-9]_crit_alarm Output voltage critical high alarm.
in[2-9]_lowest Lowest output voltage. LTC2978 only.
in[2-9]_highest Lowest output voltage.
in[2-9]_reset_history Reset history. Writing into this attribute will reset
history for all attributes.
temp[1-3]_input Measured temperature.
On LTC2978, only one temperature measurement is
supported and reflects the internal temperature.
On LTC3880, temp1 and temp2 report external
temperatures, and temp3 reports the internal
temperature.
temp[1-3]_min Mimimum temperature.
temp[1-3]_max Maximum temperature.
temp[1-3]_lcrit Critical low temperature.
temp[1-3]_crit Critical high temperature.
temp[1-3]_min_alarm Chip temperature low alarm.
temp[1-3]_max_alarm Chip temperature high alarm.
temp[1-3]_lcrit_alarm Chip temperature critical low alarm.
temp[1-3]_crit_alarm Chip temperature critical high alarm.
temp[1-3]_lowest Lowest measured temperature. LTC2978 only.
temp[1-3]_highest Highest measured temperature.
temp[1-3]_reset_history Reset history. Writing into this attribute will reset
history for all attributes.
power[1-2]_label "pout[1-2]". LTC3880 only.
power[1-2]_input Measured power.
curr1_label "iin". LTC3880 only.
curr1_input Measured input current.
curr1_max Maximum input current.
curr1_max_alarm Input current high alarm.
curr[2-3]_label "iout[1-2]". LTC3880 only.
curr[2-3]_input Measured input current.
curr[2-3]_max Maximum input current.
curr[2-3]_crit Critical input current.
curr[2-3]_max_alarm Input current high alarm.
curr[2-3]_crit_alarm Input current critical high alarm.
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