| Kernel driver lineage-pem |
| ========================= |
| |
| Supported devices: |
| * Lineage Compact Power Line Power Entry Modules |
| Prefix: 'lineage-pem' |
| Addresses scanned: - |
| Documentation: |
| http://www.lineagepower.com/oem/pdf/CPLI2C.pdf |
| |
| Author: Guenter Roeck <guenter.roeck@ericsson.com> |
| |
| |
| Description |
| ----------- |
| |
| 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) |
| |
| temp1_input |
| temp1_max |
| temp1_crit |
| temp1_alarm |
| temp1_crit_alarm |
| temp1_fault |
