1 Kernel driver lineage-pem
2 =========================
6 * Lineage Compact Power Line Power Entry Modules
14 http://www.lineagepower.com/oem/pdf/CPLI2C.pdf
16 Author: Guenter Roeck <linux@roeck-us.net>
22 This driver supports various Lineage Compact Power Line DC/DC and AC/DC
23 converters such as CP1800, CP2000AC, CP2000DC, CP2100DC, and others.
25 Lineage CPL power entry modules are nominally PMBus compliant. However, most
26 standard PMBus commands are not supported. Specifically, all hardware monitoring
27 and status reporting commands are non-standard. For this reason, a standard
28 PMBus driver can not be used.
34 This driver does not probe for Lineage CPL devices, since there is no register
35 which can be safely used to identify the chip. You will have to instantiate
36 the devices explicitly.
38 Example: the following will load the driver for a Lineage PEM at address 0x40
41 $ modprobe lineage-pem
42 $ echo lineage-pem 0x40 > /sys/bus/i2c/devices/i2c-1/new_device
44 All Lineage CPL power entry modules have a built-in I2C bus master selector
45 (PCA9541). To ensure device access, this driver should only be used as client
46 driver to the pca9541 I2C master selector driver.
52 All Lineage CPL devices report output voltage and device temperature as well as
53 alarms for output voltage, temperature, input voltage, input current, input power,
56 Input voltage, input current, input power, and fan speed measurement is only
57 supported on newer devices. The driver detects if those attributes are supported,
58 and only creates respective sysfs entries if they are.
60 ======================= ===============================
61 in1_input Output voltage (mV)
62 in1_min_alarm Output undervoltage alarm
63 in1_max_alarm Output overvoltage alarm
64 in1_crit Output voltage critical alarm
66 in2_input Input voltage (mV, optional)
67 in2_alarm Input voltage alarm
69 curr1_input Input current (mA, optional)
70 curr1_alarm Input overcurrent alarm
72 power1_input Input power (uW, optional)
73 power1_alarm Input power alarm
75 fan1_input Fan 1 speed (rpm, optional)
76 fan2_input Fan 2 speed (rpm, optional)
77 fan3_input Fan 3 speed (rpm, optional)
85 ======================= ===============================