hwmon: (pmbus) Add driver for Delta DPS-920AB PSU
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> Link: https://lore.kernel.org/r/20210607103431.2039073-1-robert.marko@sartura.hr [groeck: Add MODULE_IMPORT_NS(PMBUS);] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Robert Marko
Guenter Roeck
parent
bf8e0cd8d6
commit
3efbcee8d4
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.. SPDX-License-Identifier: GPL-2.0-or-later
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Kernel driver dps920ab
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========================
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Supported chips:
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* Delta DPS920AB
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Prefix: 'dps920ab'
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Addresses scanned: -
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Authors:
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Robert Marko <robert.marko@sartura.hr>
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Description
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-----------
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This driver implements support for Delta DPS920AB 920W 54V DC single output
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power supply with PMBus support.
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The driver is a client driver to the core PMBus driver.
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Please see Documentation/hwmon/pmbus.rst for details on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
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details.
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Sysfs entries
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-------------
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======================= ======================================================
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curr1_label "iin"
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curr1_input Measured input current
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curr1_alarm Input current high alarm
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curr2_label "iout1"
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curr2_input Measured output current
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curr2_max Maximum output current
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curr2_rated_max Maximum rated output current
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in1_label "vin"
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in1_input Measured input voltage
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in1_alarm Input voltage alarm
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in2_label "vout1"
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in2_input Measured output voltage
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in2_rated_min Minimum rated output voltage
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in2_rated_max Maximum rated output voltage
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in2_alarm Output voltage alarm
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power1_label "pin"
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power1_input Measured input power
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power1_alarm Input power high alarm
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power2_label "pout1"
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power2_input Measured output power
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power2_rated_max Maximum rated output power
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temp[1-3]_input Measured temperature
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temp[1-3]_alarm Temperature alarm
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fan1_alarm Fan 1 warning.
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fan1_fault Fan 1 fault.
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fan1_input Fan 1 speed in RPM.
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======================= ======================================================
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@ -53,6 +53,7 @@ Hardware Monitoring Kernel Drivers
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da9055
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dell-smm-hwmon
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dme1737
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dps920ab
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drivetemp
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ds1621
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ds620
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@ -86,6 +86,15 @@ config SENSORS_IBM_CFFPS
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This driver can also be built as a module. If so, the module will
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be called ibm-cffps.
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config SENSORS_DPS920AB
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tristate "Delta DPS920AB Power Supply"
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help
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If you say yes here you get hardware monitoring support for Delta
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DPS920AB Power Supplies.
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This driver can also be built as a module. If so, the module will
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be called dps920ab.
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config SENSORS_INSPUR_IPSPS
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tristate "INSPUR Power System Power Supply"
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help
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@ -11,6 +11,7 @@ obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o
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obj-$(CONFIG_SENSORS_BPA_RS600) += bpa-rs600.o
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obj-$(CONFIG_SENSORS_FSP_3Y) += fsp-3y.o
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obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
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obj-$(CONFIG_SENSORS_DPS920AB) += dps920ab.o
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obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
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obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
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obj-$(CONFIG_SENSORS_IR36021) += ir36021.o
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@ -0,0 +1,208 @@
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Delta DPS920AB PSU
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*
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* Copyright (C) 2021 Delta Networks, Inc.
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* Copyright (C) 2021 Sartura Ltd.
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*/
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#include <linux/debugfs.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include "pmbus.h"
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struct dps920ab_data {
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char *mfr_model;
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char *mfr_id;
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};
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static int dps920ab_read_word_data(struct i2c_client *client, int page, int phase, int reg)
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{
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/*
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* This masks commands which are not supported.
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* PSU advertises that all features are supported,
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* in reality that unfortunately is not true.
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* So enable only those that the datasheet confirms.
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*/
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switch (reg) {
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case PMBUS_FAN_COMMAND_1:
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case PMBUS_IOUT_OC_WARN_LIMIT:
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case PMBUS_STATUS_WORD:
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case PMBUS_READ_VIN:
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case PMBUS_READ_IIN:
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case PMBUS_READ_VOUT:
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case PMBUS_READ_IOUT:
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case PMBUS_READ_TEMPERATURE_1:
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case PMBUS_READ_TEMPERATURE_2:
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case PMBUS_READ_TEMPERATURE_3:
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case PMBUS_READ_FAN_SPEED_1:
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case PMBUS_READ_POUT:
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case PMBUS_READ_PIN:
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case PMBUS_MFR_VOUT_MIN:
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case PMBUS_MFR_VOUT_MAX:
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case PMBUS_MFR_IOUT_MAX:
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case PMBUS_MFR_POUT_MAX:
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return pmbus_read_word_data(client, page, phase, reg);
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default:
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return -ENXIO;
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}
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}
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static int dps920ab_write_word_data(struct i2c_client *client, int page, int reg,
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u16 word)
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{
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/*
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* This masks commands which are not supported.
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* PSU only has one R/W register and that is
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* for the fan.
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*/
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switch (reg) {
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case PMBUS_FAN_COMMAND_1:
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return pmbus_write_word_data(client, page, reg, word);
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default:
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return -EACCES;
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}
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}
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static struct pmbus_driver_info dps920ab_info = {
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.pages = 1,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_VOLTAGE_OUT] = linear,
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.format[PSC_CURRENT_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.format[PSC_POWER] = linear,
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.format[PSC_FAN] = linear,
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.format[PSC_TEMPERATURE] = linear,
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.func[0] =
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PMBUS_HAVE_VIN | PMBUS_HAVE_IIN | PMBUS_HAVE_PIN |
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PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 |
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PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 |
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PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
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.read_word_data = dps920ab_read_word_data,
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.write_word_data = dps920ab_write_word_data,
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};
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static int dps920ab_mfr_id_show(struct seq_file *s, void *data)
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{
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struct dps920ab_data *priv = s->private;
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seq_printf(s, "%s\n", priv->mfr_id);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_id);
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static int dps920ab_mfr_model_show(struct seq_file *s, void *data)
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{
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struct dps920ab_data *priv = s->private;
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seq_printf(s, "%s\n", priv->mfr_model);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_model);
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static void dps920ab_init_debugfs(struct dps920ab_data *data, struct i2c_client *client)
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{
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struct dentry *debugfs_dir;
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struct dentry *root;
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root = pmbus_get_debugfs_dir(client);
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if (!root)
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return;
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debugfs_dir = debugfs_create_dir(client->name, root);
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if (!debugfs_dir)
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return;
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debugfs_create_file("mfr_id",
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0400,
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debugfs_dir,
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data,
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&dps920ab_mfr_id_fops);
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debugfs_create_file("mfr_model",
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0400,
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debugfs_dir,
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data,
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&dps920ab_mfr_model_fops);
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}
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static int dps920ab_probe(struct i2c_client *client)
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{
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u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
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struct dps920ab_data *data;
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int ret;
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data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer ID\n");
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return ret;
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}
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buf[ret] = '\0';
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if (ret != 5 || strncmp(buf, "DELTA", 5)) {
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buf[ret] = '\0';
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dev_err(&client->dev, "Unsupported Manufacturer ID '%s'\n", buf);
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return -ENODEV;
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}
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data->mfr_id = devm_kstrdup(&client->dev, buf, GFP_KERNEL);
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if (!data->mfr_id)
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return -ENOMEM;
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer Model\n");
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return ret;
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}
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buf[ret] = '\0';
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if (ret != 11 || strncmp(buf, "DPS-920AB", 9)) {
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dev_err(&client->dev, "Unsupported Manufacturer Model '%s'\n", buf);
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return -ENODEV;
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}
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data->mfr_model = devm_kstrdup(&client->dev, buf, GFP_KERNEL);
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if (!data->mfr_model)
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return -ENOMEM;
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ret = pmbus_do_probe(client, &dps920ab_info);
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if (ret)
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return ret;
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dps920ab_init_debugfs(data, client);
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return 0;
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}
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static const struct of_device_id __maybe_unused dps920ab_of_match[] = {
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{ .compatible = "delta,dps920ab", },
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{}
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};
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MODULE_DEVICE_TABLE(of, dps920ab_of_match);
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static struct i2c_driver dps920ab_driver = {
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.driver = {
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.name = "dps920ab",
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.of_match_table = of_match_ptr(dps920ab_of_match),
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},
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.probe_new = dps920ab_probe,
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};
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module_i2c_driver(dps920ab_driver);
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MODULE_AUTHOR("Robert Marko <robert.marko@sartura.hr>");
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MODULE_DESCRIPTION("PMBus driver for Delta DPS920AB PSU");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS(PMBUS);
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