Kernel driver smm665¶
Supported chips:
Summit Microelectronics SMM465
Prefix: 'smm465'
Addresses scanned: -
Datasheet:
Summit Microelectronics SMM665, SMM665B
Prefix: 'smm665'
Addresses scanned: -
Datasheet:
Summit Microelectronics SMM665C
Prefix: 'smm665c'
Addresses scanned: -
Datasheet:
Summit Microelectronics SMM764
Prefix: 'smm764'
Addresses scanned: -
Datasheet:
Summit Microelectronics SMM766, SMM766B
Prefix: 'smm766'
Addresses scanned: -
Datasheets:
Author: Guenter Roeck <linux@roeck-us.net>
Module Parameters¶
- vref: int
Default: 1250 (mV)
Reference voltage on VREF_ADC pin in mV. It should not be necessary to set this parameter unless a non-default reference voltage is used.
Description¶
[From datasheet] The SMM665 is an Active DC Output power supply Controller that monitors, margins and cascade sequences power. The part monitors six power supply channels as well as VDD, 12V input, two general-purpose analog inputs and an internal temperature sensor using a 10-bit ADC.
Each monitored channel has its own high and low limits, plus a critical limit.
Support for SMM465, SMM764, and SMM766 has been implemented but is untested.
Usage Notes¶
This driver does not probe for devices, since there is no register which can be safely used to identify the chip. You will have to instantiate the devices explicitly. When instantiating the device, you have to specify its configuration register address.
Example: the following will load the driver for an SMM665 at address 0x57 on I2C bus #1:
$ modprobe smm665
$ echo smm665 0x57 > /sys/bus/i2c/devices/i2c-1/new_device
Sysfs entries¶
This driver uses the values in the datasheet to convert ADC register values into the values specified in the sysfs-interface document. All attributes are read only.
Min, max, lcrit, and crit values are used by the chip to trigger external signals and/or other activity. Triggered signals can include HEALTHY, RST, Power Off, or Fault depending on the chip configuration. The driver reports values as lcrit or crit if exceeding the limits triggers RST, Power Off, or Fault, and as min or max otherwise. For details please see the SMM665 datasheet.
For SMM465 and SMM764, values for Channel E and F are reported but undefined.
in1_input |
12V input voltage (mV) |
in2_input |
3.3V (VDD) input voltage (mV) |
in3_input |
Channel A voltage (mV) |
in4_input |
Channel B voltage (mV) |
in5_input |
Channel C voltage (mV) |
in6_input |
Channel D voltage (mV) |
in7_input |
Channel E voltage (mV) |
in8_input |
Channel F voltage (mV) |
in9_input |
AIN1 voltage (mV) |
in10_input |
AIN2 voltage (mV) |
in1_min |
12v input minimum voltage (mV) |
in2_min |
3.3V (VDD) input minimum voltage (mV) |
in3_min |
Channel A minimum voltage (mV) |
in4_min |
Channel B minimum voltage (mV) |
in5_min |
Channel C minimum voltage (mV) |
in6_min |
Channel D minimum voltage (mV) |
in7_min |
Channel E minimum voltage (mV) |
in8_min |
Channel F minimum voltage (mV) |
in9_min |
AIN1 minimum voltage (mV) |
in10_min |
AIN2 minimum voltage (mV) |
in1_max |
12v input maximum voltage (mV) |
in2_max |
3.3V (VDD) input maximum voltage (mV) |
in3_max |
Channel A maximum voltage (mV) |
in4_max |
Channel B maximum voltage (mV) |
in5_max |
Channel C maximum voltage (mV) |
in6_max |
Channel D maximum voltage (mV) |
in7_max |
Channel E maximum voltage (mV) |
in8_max |
Channel F maximum voltage (mV) |
in9_max |
AIN1 maximum voltage (mV) |
in10_max |
AIN2 maximum voltage (mV) |
in1_lcrit |
12v input critical minimum voltage (mV) |
in2_lcrit |
3.3V (VDD) input critical minimum voltage (mV) |
in3_lcrit |
Channel A critical minimum voltage (mV) |
in4_lcrit |
Channel B critical minimum voltage (mV) |
in5_lcrit |
Channel C critical minimum voltage (mV) |
in6_lcrit |
Channel D critical minimum voltage (mV) |
in7_lcrit |
Channel E critical minimum voltage (mV) |
in8_lcrit |
Channel F critical minimum voltage (mV) |
in9_lcrit |
AIN1 critical minimum voltage (mV) |
in10_lcrit |
AIN2 critical minimum voltage (mV) |
in1_crit |
12v input critical maximum voltage (mV) |
in2_crit |
3.3V (VDD) input critical maximum voltage (mV) |
in3_crit |
Channel A critical maximum voltage (mV) |
in4_crit |
Channel B critical maximum voltage (mV) |
in5_crit |
Channel C critical maximum voltage (mV) |
in6_crit |
Channel D critical maximum voltage (mV) |
in7_crit |
Channel E critical maximum voltage (mV) |
in8_crit |
Channel F critical maximum voltage (mV) |
in9_crit |
AIN1 critical maximum voltage (mV) |
in10_crit |
AIN2 critical maximum voltage (mV) |
in1_crit_alarm |
12v input critical alarm |
in2_crit_alarm |
3.3V (VDD) input critical alarm |
in3_crit_alarm |
Channel A critical alarm |
in4_crit_alarm |
Channel B critical alarm |
in5_crit_alarm |
Channel C critical alarm |
in6_crit_alarm |
Channel D critical alarm |
in7_crit_alarm |
Channel E critical alarm |
in8_crit_alarm |
Channel F critical alarm |
in9_crit_alarm |
AIN1 critical alarm |
in10_crit_alarm |
AIN2 critical alarm |
temp1_input |
Chip temperature |
temp1_min |
Minimum chip temperature |
temp1_max |
Maximum chip temperature |
temp1_crit |
Critical chip temperature |
temp1_crit_alarm |
Temperature critical alarm |