mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
ccf2dc51bc
LTM2975 is a dual 9A or single 18A μModule regulator. It is register compatible with LTM4676. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
212 lines
7.3 KiB
Plaintext
212 lines
7.3 KiB
Plaintext
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
|
|
|
|
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.
|
|
|
|
|
|
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.
|