forked from luck/tmp_suning_uos_patched
f76992b00a
The chip's programming interface is quite similar to LTC3880 and supports the same set of sensors. Reviewed-by: Robert Coulson <rob.coulson@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
158 lines
5.3 KiB
Plaintext
158 lines
5.3 KiB
Plaintext
Kernel driver ltc2978
|
|
=====================
|
|
|
|
Supported chips:
|
|
* Linear Technology LTC2974
|
|
Prefix: 'ltc2974'
|
|
Addresses scanned: -
|
|
Datasheet: http://www.linear.com/product/ltc2974
|
|
* 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 LTC3880
|
|
Prefix: 'ltc3880'
|
|
Addresses scanned: -
|
|
Datasheet: http://www.linear.com/product/ltc3880
|
|
* Linear Technology LTC3883
|
|
Prefix: 'ltc3883'
|
|
Addresses scanned: -
|
|
Datasheet: http://www.linear.com/product/ltc3883
|
|
* Linear Technology LTM4676
|
|
Prefix: 'ltm4676'
|
|
Addresses scanned: -
|
|
Datasheet: http://www.linear.com/product/ltm4676
|
|
|
|
Author: Guenter Roeck <linux@roeck-us.net>
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
LTC2974 is a quad digital power supply manager. LTC2978 is an octal power supply
|
|
monitor. LTC2977 is a pin compatible replacement for LTC2978. LTC3880 is a dual
|
|
output poly-phase step-down DC/DC controller. LTC3883 is a single phase
|
|
step-down DC/DC controller. LTM4676 is a dual 13A or single 26A 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, LTC2977, and LTC2978 only.
|
|
in1_lcrit Critical minimum input voltage.
|
|
LTC2974, LTC2977, and LTC2978 only.
|
|
in1_crit Critical maximum input voltage.
|
|
in1_min_alarm Input voltage low alarm.
|
|
in1_max_alarm Input voltage high alarm.
|
|
LTC2974, LTC2977, and LTC2978 only.
|
|
in1_lcrit_alarm Input voltage critical low alarm.
|
|
LTC2974, LTC2977, and LTC2978 only.
|
|
in1_crit_alarm Input voltage critical high alarm.
|
|
in1_lowest Lowest input voltage.
|
|
LTC2974, LTC2977, and LTC2978 only.
|
|
in1_highest Highest input voltage.
|
|
in1_reset_history Reset input voltage history.
|
|
|
|
in[N]_label "vout[1-8]".
|
|
LTC2974: N=2-5
|
|
LTC2977: N=2-9
|
|
LTC2978: N=2-9
|
|
LTC3880, 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 and LTC2978 only.
|
|
in[N]_highest Highest output voltage.
|
|
in[N]_reset_history Reset output voltage history.
|
|
|
|
temp[N]_input Measured temperature.
|
|
On LTC2974, temp[1-4] report external temperatures,
|
|
and temp5 reports the chip temperature.
|
|
On LTC2977 and LTC2978, only one temperature measurement
|
|
is supported and reports the chip temperature.
|
|
On LTC3880 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, and LTC2978 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, LTC2977, and LTC2978 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, LTC2977, and LTC2978 only.
|
|
Not supported for chip temperature sensor on LTC2974.
|
|
temp[N]_highest Highest measured temperature. Not supported for chip
|
|
temperature sensor on LTC2974.
|
|
temp[N]_reset_history Reset temperature history. Not supported for chip
|
|
temperature sensor on LTC2974.
|
|
|
|
power1_label "pin". LTC3883 only.
|
|
power1_input Measured input power.
|
|
|
|
power[N]_label "pout[1-4]".
|
|
LTC2974: N=1-4
|
|
LTC2977: Not supported
|
|
LTC2978: Not supported
|
|
LTC3880, LTM4676: N=1-2
|
|
LTC3883: N=2
|
|
power[N]_input Measured output power.
|
|
|
|
curr1_label "iin". LTC3880, LTC3883, 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 only.
|
|
curr1_reset_history Reset input current history. LTC3883 only.
|
|
|
|
curr[N]_label "iout[1-4]".
|
|
LTC2974: N=1-4
|
|
LTC2977: not supported
|
|
LTC2978: not supported
|
|
LTC3880, 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 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 only.
|
|
curr[N]_lowest Lowest output current. LTC2974 only.
|
|
curr[N]_highest Highest output current.
|
|
curr[N]_reset_history Reset output current history.
|