Kernel driver lt7182s¶
Supported chips:
ADI LT7182S
Prefix: ‘lt7182s’
Addresses scanned: -
Author: Guenter Roeck <linux@roeck-us.net>
Description¶
LT7182S is a Dual Channel 6A, 20V PolyPhase Step-Down Silent Switcher with Digital Power System Management support.
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 a LT7182S at address 0x4f on I2C bus #4:
# modprobe lt7182s
# echo lt7182s 0x4f > /sys/bus/i2c/devices/i2c-4/new_device
It can also be instantiated by declaring an entry in device tree.
Sysfs attributes¶
curr[1-2]_label |
“iin[12]” |
curr[1-2]_input |
Measured input current |
curr[1-2]_max |
Maximum input current |
curr[1-2]_max_alarm |
Current high alarm |
curr[3-4]_label |
“iout[1-2]” |
curr[3-4]_input |
Measured output current |
curr[3-4]_highest |
Highest measured output current |
curr[3-4]_max |
Maximum output current |
curr[3-4]_max_alarm |
Output current high alarm |
in[1-2]_label |
“vin[12]” |
in[1-2]_input |
Measured input voltage |
in[1-2]_highest |
Highest measured input voltage |
in[1-2]_crit |
Critical maximum input voltage |
in[1-2]_crit_alarm |
Input voltage critical high alarm |
in[1-2]_min |
Minimum input voltage |
in[1-2]_min_alarm |
Input voltage low alarm |
in[1-2]_rated_min |
Rated minimum input voltage |
in[1-2]_rated_max |
Rated maximum input voltage |
in1_reset_history |
Write to reset history for all attributes |
in[3-5]_label |
“vmon[1-3]” |
in[3-5]_input |
Measured voltage on ITH1/ITH2/EXTVCC pins Only available if enabled with MFR_ADC_CONTROL_LT7182S command. |
in[3-4|6-7]_label |
“vout[1-2]” |
in[3-4|6-7]_input |
Measured output voltage |
in[3-4|6-7]_highest |
Highest measured output voltage |
in[3-4|6-7]_lcrit |
Critical minimum output voltage |
in[3-4|6-7]_lcrit_alarm |
Output voltage critical low alarm |
in[3-4|6-7]_min |
Minimum output voltage |
in[3-4|6-7]_max_alarm |
Output voltage low alarm |
in[3-4|6-7]_max |
Maximum output voltage |
in[3-4|6-7]_max_alarm |
Output voltage high alarm |
in[3-4|6-7]_crit |
Critical maximum output voltage |
in[3-4|6-7]_crit_alarm |
Output voltage critical high alarm |
power[1-2]_label |
“pout[1-2]” |
power[1-2]_input |
Measured output power |
temp1_input |
Measured temperature |
temp1_crit |
Critical high temperature |
temp1_crit_alarm |
Chip temperature critical high alarm |
temp1_max |
Maximum temperature |
temp1_max_alarm |
Chip temperature high alarm |