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-Kernel driver ltc2978
-=====================
-
-Supported chips:
- * Linear Technology LTC2974
- Prefix: 'ltc2974'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2974
- * Linear Technology LTC2975
- Prefix: 'ltc2975'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2975
- * Linear Technology LTC2977
- Prefix: 'ltc2977'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2977
- * Linear Technology LTC2978, LTC2978A
- Prefix: 'ltc2978'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2978
- http://www.linear.com/product/ltc2978a
- * Linear Technology LTC2980
- Prefix: 'ltc2980'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc2980
- * Linear Technology LTC3880
- Prefix: 'ltc3880'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3880
- * Linear Technology LTC3882
- Prefix: 'ltc3882'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3882
- * Linear Technology LTC3883
- Prefix: 'ltc3883'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3883
- * Linear Technology LTC3886
- Prefix: 'ltc3886'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3886
- * Linear Technology LTC3887
- Prefix: 'ltc3887'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltc3887
- * Linear Technology LTM2987
- Prefix: 'ltm2987'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltm2987
- * Linear Technology LTM4675
- Prefix: 'ltm4675'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltm4675
- * Linear Technology LTM4676
- Prefix: 'ltm4676'
- Addresses scanned: -
- Datasheet: http://www.linear.com/product/ltm4676
- * Analog Devices LTM4686
- Prefix: 'ltm4686'
- Addresses scanned: -
- Datasheet: http://www.analog.com/ltm4686
-
-Author: Guenter Roeck <linux@roeck-us.net>
-
-
-Description
------------
-
-LTC2974 and LTC2975 are quad digital power supply managers.
-LTC2978 is an octal power supply monitor.
-LTC2977 is a pin compatible replacement for LTC2978.
-LTC2980 is a 16-channel Power System Manager, consisting of two LTC2977
-in a single die. The chip is instantiated and reported as two separate chips
-on two different I2C bus addresses.
-LTC3880, LTC3882, LTC3886, and LTC3887 are dual output poly-phase step-down
-DC/DC controllers.
-LTC3883 is a single phase step-down DC/DC controller.
-LTM2987 is a 16-channel Power System Manager with two LTC2977 plus
-additional components on a single die. The chip is instantiated and reported
-as two separate chips on two different I2C bus addresses.
-LTM4675 is a dual 9A or single 18A μModule regulator
-LTM4676 is a dual 13A or single 26A uModule regulator.
-LTM4686 is a dual 10A or single 20A uModule regulator.
-
-
-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.
- LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
- LTM2987 only.
-in1_lcrit Critical minimum input voltage.
- LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
- LTM2987 only.
-in1_crit Critical maximum input voltage.
-in1_min_alarm Input voltage low alarm.
-in1_max_alarm Input voltage high alarm.
- LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
- LTM2987 only.
-in1_lcrit_alarm Input voltage critical low alarm.
- LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
- LTM2987 only.
-in1_crit_alarm Input voltage critical high alarm.
-in1_lowest Lowest input voltage.
- LTC2974, LTC2975, LTC2977, LTC2980, LTC2978, and
- LTM2987 only.
-in1_highest Highest input voltage.
-in1_reset_history Reset input voltage history.
-
-in[N]_label "vout[1-8]".
- LTC2974, LTC2975: N=2-5
- LTC2977, LTC2980, LTM2987: N=2-9
- LTC2978: N=2-9
- LTC3880, LTC3882, LTC23886 LTC3887, LTM4675, LTM4676:
- N=2-3
- LTC3883: N=2
-in[N]_input Measured output voltage.
-in[N]_min Minimum output voltage.
-in[N]_max Maximum output voltage.
-in[N]_lcrit Critical minimum output voltage.
-in[N]_crit Critical maximum output voltage.
-in[N]_min_alarm Output voltage low alarm.
-in[N]_max_alarm Output voltage high alarm.
-in[N]_lcrit_alarm Output voltage critical low alarm.
-in[N]_crit_alarm Output voltage critical high alarm.
-in[N]_lowest Lowest output voltage. LTC2974, LTC2975,
- and LTC2978 only.
-in[N]_highest Highest output voltage.
-in[N]_reset_history Reset output voltage history.
-
-temp[N]_input Measured temperature.
- On LTC2974 and LTC2975, temp[1-4] report external
- temperatures, and temp5 reports the chip temperature.
- On LTC2977, LTC2980, LTC2978, and LTM2987, only one
- temperature measurement is supported and reports
- the chip temperature.
- On LTC3880, LTC3882, LTC3887, LTM4675, and LTM4676,
- temp1 and temp2 report external temperatures, and temp3
- reports the chip temperature.
- On LTC3883, temp1 reports an external temperature,
- and temp2 reports the chip temperature.
-temp[N]_min Mimimum temperature. LTC2974, LCT2977, LTM2980, LTC2978,
- and LTM2987 only.
-temp[N]_max Maximum temperature.
-temp[N]_lcrit Critical low temperature.
-temp[N]_crit Critical high temperature.
-temp[N]_min_alarm Temperature low alarm.
- LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
- LTM2987 only.
-temp[N]_max_alarm Temperature high alarm.
-temp[N]_lcrit_alarm Temperature critical low alarm.
-temp[N]_crit_alarm Temperature critical high alarm.
-temp[N]_lowest Lowest measured temperature.
- LTC2974, LTC2975, LTC2977, LTM2980, LTC2978, and
- LTM2987 only.
- Not supported for chip temperature sensor on LTC2974 and
- LTC2975.
-temp[N]_highest Highest measured temperature. Not supported for chip
- temperature sensor on LTC2974 and LTC2975.
-temp[N]_reset_history Reset temperature history. Not supported for chip
- temperature sensor on LTC2974 and LTC2975.
-
-power1_label "pin". LTC3883 and LTC3886 only.
-power1_input Measured input power.
-
-power[N]_label "pout[1-4]".
- LTC2974, LTC2975: N=1-4
- LTC2977, LTC2980, LTM2987: Not supported
- LTC2978: Not supported
- LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
- N=1-2
- LTC3883: N=2
-power[N]_input Measured output power.
-
-curr1_label "iin". LTC3880, LTC3883, LTC3886, LTC3887, LTM4675,
- and LTM4676 only.
-curr1_input Measured input current.
-curr1_max Maximum input current.
-curr1_max_alarm Input current high alarm.
-curr1_highest Highest input current. LTC3883 and LTC3886 only.
-curr1_reset_history Reset input current history. LTC3883 and LTC3886 only.
-
-curr[N]_label "iout[1-4]".
- LTC2974, LTC2975: N=1-4
- LTC2977, LTC2980, LTM2987: not supported
- LTC2978: not supported
- LTC3880, LTC3882, LTC3886, LTC3887, LTM4675, LTM4676:
- N=2-3
- LTC3883: N=2
-curr[N]_input Measured output current.
-curr[N]_max Maximum output current.
-curr[N]_crit Critical high output current.
-curr[N]_lcrit Critical low output current. LTC2974 and LTC2975 only.
-curr[N]_max_alarm Output current high alarm.
-curr[N]_crit_alarm Output current critical high alarm.
-curr[N]_lcrit_alarm Output current critical low alarm.
- LTC2974 and LTC2975 only.
-curr[N]_lowest Lowest output current. LTC2974 and LTC2975 only.
-curr[N]_highest Highest output current.
-curr[N]_reset_history Reset output current history.