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- Kernel driver ltc2978
- =====================
- Supported chips:
- * Linear Technology LTC2978
- Prefix: 'ltc2978'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2978
- * Linear Technology LTC3880
- Prefix: 'ltc3880'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3880
- Author: Guenter Roeck <linux@roeck-us.net>
- 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. LTC2978 only.
- in1_lcrit Critical minimum input voltage. LTC2978 only.
- in1_crit Critical maximum input voltage.
- in1_min_alarm Input voltage low alarm.
- in1_max_alarm Input voltage high alarm. LTC2978 only.
- in1_lcrit_alarm Input voltage critical low alarm. LTC2978 only.
- in1_crit_alarm Input voltage critical high alarm.
- in1_lowest Lowest input voltage. LTC2978 only.
- in1_highest Highest input voltage.
- in1_reset_history Reset input voltage history.
- 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 output voltage history.
- temp[1-3]_input Measured temperature.
- On LTC2978, only one temperature measurement is
- supported and reports the chip temperature.
- On LTC3880, temp1 and temp2 report external
- temperatures, and temp3 reports the chip
- temperature.
- temp[1-3]_min Mimimum temperature. LTC2978 only.
- 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 Temperature low alarm. LTC2978 only.
- temp[1-3]_max_alarm Temperature high alarm.
- temp[1-3]_lcrit_alarm Temperature critical low alarm.
- temp[1-3]_crit_alarm 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 temperature history.
- 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 output current.
- curr[2-3]_max Maximum output current.
- curr[2-3]_crit Critical output current.
- curr[2-3]_max_alarm Output current high alarm.
- curr[2-3]_crit_alarm Output current critical high alarm.
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