linux/Documentation/hwmon/lineage-pem
<<
>>
Prefs
   1Kernel driver lineage-pem
   2=========================
   3
   4Supported devices:
   5  * Lineage Compact Power Line Power Entry Modules
   6    Prefix: 'lineage-pem'
   7    Addresses scanned: -
   8    Documentation:
   9        http://www.lineagepower.com/oem/pdf/CPLI2C.pdf
  10
  11Author: Guenter Roeck <guenter.roeck@ericsson.com>
  12
  13
  14Description
  15-----------
  16
  17This driver supports various Lineage Compact Power Line DC/DC and AC/DC
  18converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others.
  19
  20Lineage CPL power entry modules are nominally PMBus compliant. However, most
  21standard PMBus commands are not supported. Specifically, all hardware monitoring
  22and status reporting commands are non-standard. For this reason, a standard
  23PMBus driver can not be used.
  24
  25
  26Usage Notes
  27-----------
  28
  29This driver does not probe for Lineage CPL devices, since there is no register
  30which can be safely used to identify the chip. You will have to instantiate
  31the devices explicitly.
  32
  33Example: the following will load the driver for a Lineage PEM at address 0x40
  34on I2C bus #1:
  35$ modprobe lineage-pem
  36$ echo lineage-pem 0x40 > /sys/bus/i2c/devices/i2c-1/new_device
  37
  38All Lineage CPL power entry modules have a built-in I2C bus master selector
  39(PCA9541). To ensure device access, this driver should only be used as client
  40driver to the pca9541 I2C master selector driver.
  41
  42
  43Sysfs entries
  44-------------
  45
  46All Lineage CPL devices report output voltage and device temperature as well as
  47alarms for output voltage, temperature, input voltage, input current, input power,
  48and fan status.
  49
  50Input voltage, input current, input power, and fan speed measurement is only
  51supported on newer devices. The driver detects if those attributes are supported,
  52and only creates respective sysfs entries if they are.
  53
  54in1_input               Output voltage (mV)
  55in1_min_alarm           Output undervoltage alarm
  56in1_max_alarm           Output overvoltage alarm
  57in1_crit                Output voltage critical alarm
  58
  59in2_input               Input voltage (mV, optional)
  60in2_alarm               Input voltage alarm
  61
  62curr1_input             Input current (mA, optional)
  63curr1_alarm             Input overcurrent alarm
  64
  65power1_input            Input power (uW, optional)
  66power1_alarm            Input power alarm
  67
  68fan1_input              Fan 1 speed (rpm, optional)
  69fan2_input              Fan 2 speed (rpm, optional)
  70fan3_input              Fan 3 speed (rpm, optional)
  71
  72temp1_input
  73temp1_max
  74temp1_crit
  75temp1_alarm
  76temp1_crit_alarm
  77temp1_fault
  78
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.