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    Subject[PATCH 1/3] hwmon: (pmbus) Add driver for Delta DPS-920AB PSU
    Date
    This adds support for the Delta DPS-920AB PSU.

    Only missing feature is fan control which the PSU supports.

    Signed-off-by: Robert Marko <robert.marko@sartura.hr>
    ---
    Documentation/hwmon/dps920ab.rst | 80 ++++++++++++++++++++++++++++++++
    Documentation/hwmon/index.rst | 1 +
    drivers/hwmon/pmbus/Kconfig | 9 ++++
    drivers/hwmon/pmbus/Makefile | 1 +
    drivers/hwmon/pmbus/dps920ab.c | 63 +++++++++++++++++++++++++
    5 files changed, 154 insertions(+)
    create mode 100644 Documentation/hwmon/dps920ab.rst
    create mode 100644 drivers/hwmon/pmbus/dps920ab.c

    diff --git a/Documentation/hwmon/dps920ab.rst b/Documentation/hwmon/dps920ab.rst
    new file mode 100644
    index 000000000000..df0aef530c7e
    --- /dev/null
    +++ b/Documentation/hwmon/dps920ab.rst
    @@ -0,0 +1,80 @@
    +.. SPDX-License-Identifier: GPL-2.0-or-later
    +
    +Kernel driver dps920ab
    +========================
    +
    +Supported chips:
    +
    + * Delta DPS920AB
    +
    + Prefix: 'dps920ab'
    +
    + Addresses scanned: -
    +
    +Authors:
    + Robert Marko <robert.marko@sartura.hr>
    +
    +
    +Description
    +-----------
    +
    +This driver implements support for Delta DPS920AB 920W 54V DC single output
    +power supply with PMBus support.
    +
    +The driver is a client driver to the core PMBus driver.
    +Please see Documentation/hwmon/pmbus.rst 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.
    +
    +
    +Sysfs entries
    +-------------
    +
    +======================= ======================================================
    +curr1_label "iin"
    +curr1_input Measured input current
    +curr1_crit Critical maximum current
    +curr1_crit_alarm Current critical high alarm
    +
    +curr2_label "iout1"
    +curr2_input Measured output current
    +curr2_crit Critical maximum current
    +curr2_crit_alarm Current critical high alarm
    +
    +in1_label "vin"
    +in1_input Measured input voltage
    +in1_lcrit Critical minimum input voltage
    +in1_lcrit_alarm Input voltage critical low alarm
    +in1_crit Critical maximum input voltage
    +in1_crit_alarm Input voltage critical high alarm
    +
    +in2_label "vout1"
    +in2_input Measured output voltage
    +in2_lcrit Critical minimum output voltage
    +in2_lcrit_alarm Output voltage critical low alarm
    +in2_crit Critical maximum output voltage
    +in2_crit_alarm Output voltage critical high alarm
    +
    +power1_label "pin"
    +power1_input Measured input power
    +power1_alarm Input power high alarm
    +
    +power2_label "pout1"
    +power2_input Measured output power
    +
    +temp[1-2]_input Measured temperature
    +temp[1-2]_crit Critical high temperature
    +temp[1-2]_crit_alarm Chip temperature critical high alarm
    +temp[1-2]_max Maximum temperature
    +temp[1-2]_max_alarm Chip temperature high alarm
    +
    +fan1_alarm Fan 1 warning.
    +fan1_fault Fan 1 fault.
    +fan1_input Fan 1 speed in RPM.
    +======================= ======================================================
    diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
    index 8d5a2df1ecb6..b24436f22052 100644
    --- a/Documentation/hwmon/index.rst
    +++ b/Documentation/hwmon/index.rst
    @@ -54,6 +54,7 @@ Hardware Monitoring Kernel Drivers
    dell-smm-hwmon
    dme1737
    drivetemp
    + dps920ab
    ds1621
    ds620
    emc1403
    diff --git a/drivers/hwmon/pmbus/Kconfig b/drivers/hwmon/pmbus/Kconfig
    index 32d2fc850621..865ade0aa205 100644
    --- a/drivers/hwmon/pmbus/Kconfig
    +++ b/drivers/hwmon/pmbus/Kconfig
    @@ -66,6 +66,15 @@ config SENSORS_IBM_CFFPS
    This driver can also be built as a module. If so, the module will
    be called ibm-cffps.

    +config SENSORS_DPS920AB
    + tristate "Delta DPS920AB Power Supply"
    + help
    + If you say yes here you get hardware monitoring support for Delta
    + DPS920AB Power Supplies.
    +
    + This driver can also be built as a module. If so, the module will
    + be called dps920ab.
    +
    config SENSORS_INSPUR_IPSPS
    tristate "INSPUR Power System Power Supply"
    help
    diff --git a/drivers/hwmon/pmbus/Makefile b/drivers/hwmon/pmbus/Makefile
    index 6a4ba0fdc1db..f59ba0123d68 100644
    --- a/drivers/hwmon/pmbus/Makefile
    +++ b/drivers/hwmon/pmbus/Makefile
    @@ -9,6 +9,7 @@ obj-$(CONFIG_SENSORS_ADM1266) += adm1266.o
    obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
    obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o
    obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
    +obj-$(CONFIG_SENSORS_DPS920AB) += dps920ab.o
    obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
    obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
    obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
    diff --git a/drivers/hwmon/pmbus/dps920ab.c b/drivers/hwmon/pmbus/dps920ab.c
    new file mode 100644
    index 000000000000..d579ed9f879c
    --- /dev/null
    +++ b/drivers/hwmon/pmbus/dps920ab.c
    @@ -0,0 +1,63 @@
    +// SPDX-License-Identifier: GPL-2.0-or-later
    +/*
    + * Driver for Delta DPS920AB PSU
    + *
    + * Copyright (C) 2021 Delta Networks, Inc.
    + * Copyright (C) 2021 Sartura Ltd.
    + */
    +
    +#include <linux/i2c.h>
    +#include <linux/module.h>
    +#include <linux/of_device.h>
    +#include "pmbus.h"
    +
    +static struct pmbus_driver_info dps920ab_info = {
    + .pages = 1,
    +
    + .format[PSC_VOLTAGE_IN] = linear,
    + .format[PSC_VOLTAGE_OUT] = linear,
    + .format[PSC_CURRENT_IN] = linear,
    + .format[PSC_CURRENT_OUT] = linear,
    + .format[PSC_POWER] = linear,
    + .format[PSC_FAN] = linear,
    + .format[PSC_TEMPERATURE] = linear,
    +
    + .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
    + PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
    + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
    + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
    + PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
    + PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 |
    + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
    +};
    +
    +static int dps920ab_probe(struct i2c_client *client)
    +{
    + if (!i2c_check_functionality(client->adapter,
    + I2C_FUNC_SMBUS_BYTE_DATA |
    + I2C_FUNC_SMBUS_WORD_DATA))
    + return -ENODEV;
    +
    + return pmbus_do_probe(client, &dps920ab_info);
    +}
    +
    +static const struct of_device_id __maybe_unused dps920ab_of_match[] = {
    + { .compatible = "delta,dps920ab", },
    + {}
    +};
    +
    +MODULE_DEVICE_TABLE(of, dps920ab_of_match);
    +
    +static struct i2c_driver dps920ab_driver = {
    + .driver = {
    + .name = "dps920ab",
    + .of_match_table = of_match_ptr(dps920ab_of_match),
    + },
    + .probe_new = dps920ab_probe,
    +};
    +
    +module_i2c_driver(dps920ab_driver);
    +
    +MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>");
    +MODULE_DESCRIPTION("PMBus driver for Delta DPS920AB PSU");
    +MODULE_LICENSE("GPL");
    --
    2.31.1
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