| .. SPDX-License-Identifier: GPL-2.0 |
| |
| Kernel driver stpddc60 |
| ====================== |
| |
| Supported chips: |
| |
| * ST STPDDC60 |
| |
| Prefix: 'stpddc60', 'bmr481' |
| |
| Addresses scanned: - |
| |
| Datasheet: https://flexpowermodules.com/documents/fpm-techspec-bmr481 |
| |
| Author: Erik Rosen <erik.rosen@metormote.com> |
| |
| |
| Description |
| ----------- |
| |
| This driver supports hardware monitoring for ST STPDDC60 controller chip and |
| compatible modules. |
| |
| The driver is a client driver to the core PMBus driver. Please see |
| Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details |
| on PMBus client drivers. |
| |
| |
| Usage Notes |
| ----------- |
| |
| This driver does not auto-detect devices. You will have to instantiate the |
| devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for |
| details. |
| |
| The vout under- and over-voltage limits are set in relation to the commanded |
| output voltage as a positive or negative offset in the interval 50mV to 400mV |
| in 50mV steps. This means that the absolute values of the limits will change |
| when the commanded output voltage changes. Also, care should be taken when |
| writing to those limits since in the worst case the commanded output voltage |
| could change at the same time as the limit is written to, which will lead to |
| unpredictable results. |
| |
| |
| Platform data support |
| --------------------- |
| |
| The driver supports standard PMBus driver platform data. |
| |
| |
| Sysfs entries |
| ------------- |
| |
| The following attributes are supported. Vin, iout, pout and temp limits |
| are read-write; all other attributes are read-only. |
| |
| ======================= ======================================================== |
| in1_label "vin" |
| in1_input Measured input voltage. |
| in1_lcrit Critical minimum input voltage. |
| in1_crit Critical maximum input voltage. |
| in1_lcrit_alarm Input voltage critical low alarm. |
| in1_crit_alarm Input voltage critical high alarm. |
| |
| in2_label "vout1" |
| in2_input Measured output voltage. |
| in2_lcrit Critical minimum output voltage. |
| in2_crit Critical maximum output voltage. |
| in2_lcrit_alarm Critical output voltage critical low alarm. |
| in2_crit_alarm Critical output voltage critical high alarm. |
| |
| curr1_label "iout1" |
| curr1_input Measured output current. |
| curr1_max Maximum output current. |
| curr1_max_alarm Output current high alarm. |
| curr1_crit Critical maximum output current. |
| curr1_crit_alarm Output current critical high alarm. |
| |
| power1_label "pout1" |
| power1_input Measured output power. |
| power1_crit Critical maximum output power. |
| power1_crit_alarm Output power critical high alarm. |
| |
| temp1_input Measured maximum temperature of all phases. |
| temp1_max Maximum temperature limit. |
| temp1_max_alarm High temperature alarm. |
| temp1_crit Critical maximum temperature limit. |
| temp1_crit_alarm Critical maximum temperature alarm. |
| ======================= ======================================================== |
