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-Kernel driver lineage-pem
-Supported devices:
- * Lineage Compact Power Line Power Entry Modules
- Prefix: 'lineage-pem'
- Addresses scanned: -
- Documentation:
-Author: Guenter Roeck <>
-This driver supports various Lineage Compact Power Line DC/DC and AC/DC
-converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others.
-Lineage CPL power entry modules are nominally PMBus compliant. However, most
-standard PMBus commands are not supported. Specifically, all hardware monitoring
-and status reporting commands are non-standard. For this reason, a standard
-PMBus driver can not be used.
-Usage Notes
-This driver does not probe for Lineage CPL devices, since there is no register
-which can be safely used to identify the chip. You will have to instantiate
-the devices explicitly.
-Example: the following will load the driver for a Lineage PEM at address 0x40
-on I2C bus #1:
-$ modprobe lineage-pem
-$ echo lineage-pem 0x40 > /sys/bus/i2c/devices/i2c-1/new_device
-All Lineage CPL power entry modules have a built-in I2C bus master selector
-(PCA9541). To ensure device access, this driver should only be used as client
-driver to the pca9541 I2C master selector driver.
-Sysfs entries
-All Lineage CPL devices report output voltage and device temperature as well as
-alarms for output voltage, temperature, input voltage, input current, input power,
-and fan status.
-Input voltage, input current, input power, and fan speed measurement is only
-supported on newer devices. The driver detects if those attributes are supported,
-and only creates respective sysfs entries if they are.
-in1_input Output voltage (mV)
-in1_min_alarm Output undervoltage alarm
-in1_max_alarm Output overvoltage alarm
-in1_crit Output voltage critical alarm
-in2_input Input voltage (mV, optional)
-in2_alarm Input voltage alarm
-curr1_input Input current (mA, optional)
-curr1_alarm Input overcurrent alarm
-power1_input Input power (uW, optional)
-power1_alarm Input power alarm
-fan1_input Fan 1 speed (rpm, optional)
-fan2_input Fan 2 speed (rpm, optional)
-fan3_input Fan 3 speed (rpm, optional)