| Message ID | 20210607103431.2039073-1-robert.marko@sartura.hr (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v4,1/3] hwmon: (pmbus) Add driver for Delta DPS-920AB PSU | expand |
On Mon, Jun 07, 2021 at 12:34:29PM +0200, Robert Marko wrote: > 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> Series applied. Thanks, Guenter > --- > Changes in v4: > * Alphabetically order documentation in index.rst > * Null terminate manufacturer and mode ID-s > * Drop debugfs directory and I2C clients from the > global structure, use local variables > > Changes in v3: > * Use generic pmbus_read/write_word_data() > * Correct word data return code > * Cache PMBUS_MFR_ID and PMBUS_MFR_MODEL instead > of reading them everytime that debugfs is read > > Changes in v2: > * Check for Manufacturer and Model > * Restrict word read/write to supported only > * Update documentation to reflect driver changes > * Add basic debugfs entries > > Documentation/hwmon/dps920ab.rst | 73 +++++++++++ > Documentation/hwmon/index.rst | 1 + > drivers/hwmon/pmbus/Kconfig | 9 ++ > drivers/hwmon/pmbus/Makefile | 1 + > drivers/hwmon/pmbus/dps920ab.c | 207 +++++++++++++++++++++++++++++++ > 5 files changed, 291 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..c33b4cdc0a60 > --- /dev/null > +++ b/Documentation/hwmon/dps920ab.rst > @@ -0,0 +1,73 @@ > +.. 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_alarm Input current high alarm > + > +curr2_label "iout1" > +curr2_input Measured output current > +curr2_max Maximum output current > +curr2_rated_max Maximum rated output current > + > +in1_label "vin" > +in1_input Measured input voltage > +in1_alarm Input voltage alarm > + > +in2_label "vout1" > +in2_input Measured output voltage > +in2_rated_min Minimum rated output voltage > +in2_rated_max Maximum rated output voltage > +in2_alarm Output voltage alarm > + > +power1_label "pin" > +power1_input Measured input power > +power1_alarm Input power high alarm > + > +power2_label "pout1" > +power2_input Measured output power > +power2_rated_max Maximum rated output power > + > +temp[1-3]_input Measured temperature > +temp[1-3]_alarm Temperature 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..8abdaf440a3c 100644 > --- a/Documentation/hwmon/index.rst > +++ b/Documentation/hwmon/index.rst > @@ -53,6 +53,7 @@ Hardware Monitoring Kernel Drivers > da9055 > dell-smm-hwmon > dme1737 > + dps920ab > drivetemp > ds1621 > ds620 > 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..692a86cdfb6d > --- /dev/null > +++ b/drivers/hwmon/pmbus/dps920ab.c > @@ -0,0 +1,207 @@ > +// 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/debugfs.h> > +#include <linux/i2c.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include "pmbus.h" > + > +struct dps920ab_data { > + char *mfr_model; > + char *mfr_id; > +}; > + > +static int dps920ab_read_word_data(struct i2c_client *client, int page, int phase, int reg) > +{ > + /* > + * This masks commands which are not supported. > + * PSU advertises that all features are supported, > + * in reality that unfortunately is not true. > + * So enable only those that the datasheet confirms. > + */ > + switch (reg) { > + case PMBUS_FAN_COMMAND_1: > + case PMBUS_IOUT_OC_WARN_LIMIT: > + case PMBUS_STATUS_WORD: > + case PMBUS_READ_VIN: > + case PMBUS_READ_IIN: > + case PMBUS_READ_VOUT: > + case PMBUS_READ_IOUT: > + case PMBUS_READ_TEMPERATURE_1: > + case PMBUS_READ_TEMPERATURE_2: > + case PMBUS_READ_TEMPERATURE_3: > + case PMBUS_READ_FAN_SPEED_1: > + case PMBUS_READ_POUT: > + case PMBUS_READ_PIN: > + case PMBUS_MFR_VOUT_MIN: > + case PMBUS_MFR_VOUT_MAX: > + case PMBUS_MFR_IOUT_MAX: > + case PMBUS_MFR_POUT_MAX: > + return pmbus_read_word_data(client, page, phase, reg); > + default: > + return -ENXIO; > + } > +} > + > +static int dps920ab_write_word_data(struct i2c_client *client, int page, int reg, > + u16 word) > +{ > + /* > + * This masks commands which are not supported. > + * PSU only has one R/W register and that is > + * for the fan. > + */ > + switch (reg) { > + case PMBUS_FAN_COMMAND_1: > + return pmbus_write_word_data(client, page, reg, word); > + default: > + return -EACCES; > + } > +} > + > +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_PIN | > + PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | > + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | > + PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 | > + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | > + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP, > + .read_word_data = dps920ab_read_word_data, > + .write_word_data = dps920ab_write_word_data, > +}; > + > +static int dps920ab_mfr_id_show(struct seq_file *s, void *data) > +{ > + struct dps920ab_data *priv = s->private; > + > + seq_printf(s, "%s\n", priv->mfr_id); > + > + return 0; > +} > + > +DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_id); > + > +static int dps920ab_mfr_model_show(struct seq_file *s, void *data) > +{ > + struct dps920ab_data *priv = s->private; > + > + seq_printf(s, "%s\n", priv->mfr_model); > + > + return 0; > +} > + > +DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_model); > + > +static void dps920ab_init_debugfs(struct dps920ab_data *data, struct i2c_client *client) > +{ > + struct dentry *debugfs_dir; > + struct dentry *root; > + > + root = pmbus_get_debugfs_dir(client); > + if (!root) > + return; > + > + debugfs_dir = debugfs_create_dir(client->name, root); > + if (!debugfs_dir) > + return; > + > + debugfs_create_file("mfr_id", > + 0400, > + debugfs_dir, > + data, > + &dps920ab_mfr_id_fops); > + > + debugfs_create_file("mfr_model", > + 0400, > + debugfs_dir, > + data, > + &dps920ab_mfr_model_fops); > +} > + > +static int dps920ab_probe(struct i2c_client *client) > +{ > + u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; > + struct dps920ab_data *data; > + int ret; > + > + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf); > + if (ret < 0) { > + dev_err(&client->dev, "Failed to read Manufacturer ID\n"); > + return ret; > + } > + > + buf[ret] = '\0'; > + if (ret != 5 || strncmp(buf, "DELTA", 5)) { > + buf[ret] = '\0'; > + dev_err(&client->dev, "Unsupported Manufacturer ID '%s'\n", buf); > + return -ENODEV; > + } > + data->mfr_id = devm_kstrdup(&client->dev, buf, GFP_KERNEL); > + if (!data->mfr_id) > + return -ENOMEM; > + > + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); > + if (ret < 0) { > + dev_err(&client->dev, "Failed to read Manufacturer Model\n"); > + return ret; > + } > + > + buf[ret] = '\0'; > + if (ret != 11 || strncmp(buf, "DPS-920AB", 9)) { > + dev_err(&client->dev, "Unsupported Manufacturer Model '%s'\n", buf); > + return -ENODEV; > + } > + data->mfr_model = devm_kstrdup(&client->dev, buf, GFP_KERNEL); > + if (!data->mfr_model) > + return -ENOMEM; > + > + ret = pmbus_do_probe(client, &dps920ab_info); > + if (ret) > + return ret; > + > + dps920ab_init_debugfs(data, client); > + > + return 0; > +} > + > +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 >
diff --git a/Documentation/hwmon/dps920ab.rst b/Documentation/hwmon/dps920ab.rst new file mode 100644 index 000000000000..c33b4cdc0a60 --- /dev/null +++ b/Documentation/hwmon/dps920ab.rst @@ -0,0 +1,73 @@ +.. 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_alarm Input current high alarm + +curr2_label "iout1" +curr2_input Measured output current +curr2_max Maximum output current +curr2_rated_max Maximum rated output current + +in1_label "vin" +in1_input Measured input voltage +in1_alarm Input voltage alarm + +in2_label "vout1" +in2_input Measured output voltage +in2_rated_min Minimum rated output voltage +in2_rated_max Maximum rated output voltage +in2_alarm Output voltage alarm + +power1_label "pin" +power1_input Measured input power +power1_alarm Input power high alarm + +power2_label "pout1" +power2_input Measured output power +power2_rated_max Maximum rated output power + +temp[1-3]_input Measured temperature +temp[1-3]_alarm Temperature 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..8abdaf440a3c 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -53,6 +53,7 @@ Hardware Monitoring Kernel Drivers da9055 dell-smm-hwmon dme1737 + dps920ab drivetemp ds1621 ds620 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..692a86cdfb6d --- /dev/null +++ b/drivers/hwmon/pmbus/dps920ab.c @@ -0,0 +1,207 @@ +// 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/debugfs.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include "pmbus.h" + +struct dps920ab_data { + char *mfr_model; + char *mfr_id; +}; + +static int dps920ab_read_word_data(struct i2c_client *client, int page, int phase, int reg) +{ + /* + * This masks commands which are not supported. + * PSU advertises that all features are supported, + * in reality that unfortunately is not true. + * So enable only those that the datasheet confirms. + */ + switch (reg) { + case PMBUS_FAN_COMMAND_1: + case PMBUS_IOUT_OC_WARN_LIMIT: + case PMBUS_STATUS_WORD: + case PMBUS_READ_VIN: + case PMBUS_READ_IIN: + case PMBUS_READ_VOUT: + case PMBUS_READ_IOUT: + case PMBUS_READ_TEMPERATURE_1: + case PMBUS_READ_TEMPERATURE_2: + case PMBUS_READ_TEMPERATURE_3: + case PMBUS_READ_FAN_SPEED_1: + case PMBUS_READ_POUT: + case PMBUS_READ_PIN: + case PMBUS_MFR_VOUT_MIN: + case PMBUS_MFR_VOUT_MAX: + case PMBUS_MFR_IOUT_MAX: + case PMBUS_MFR_POUT_MAX: + return pmbus_read_word_data(client, page, phase, reg); + default: + return -ENXIO; + } +} + +static int dps920ab_write_word_data(struct i2c_client *client, int page, int reg, + u16 word) +{ + /* + * This masks commands which are not supported. + * PSU only has one R/W register and that is + * for the fan. + */ + switch (reg) { + case PMBUS_FAN_COMMAND_1: + return pmbus_write_word_data(client, page, reg, word); + default: + return -EACCES; + } +} + +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_PIN | + PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT | PMBUS_HAVE_POUT | + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | + PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12 | + PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT | + PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP, + .read_word_data = dps920ab_read_word_data, + .write_word_data = dps920ab_write_word_data, +}; + +static int dps920ab_mfr_id_show(struct seq_file *s, void *data) +{ + struct dps920ab_data *priv = s->private; + + seq_printf(s, "%s\n", priv->mfr_id); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_id); + +static int dps920ab_mfr_model_show(struct seq_file *s, void *data) +{ + struct dps920ab_data *priv = s->private; + + seq_printf(s, "%s\n", priv->mfr_model); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(dps920ab_mfr_model); + +static void dps920ab_init_debugfs(struct dps920ab_data *data, struct i2c_client *client) +{ + struct dentry *debugfs_dir; + struct dentry *root; + + root = pmbus_get_debugfs_dir(client); + if (!root) + return; + + debugfs_dir = debugfs_create_dir(client->name, root); + if (!debugfs_dir) + return; + + debugfs_create_file("mfr_id", + 0400, + debugfs_dir, + data, + &dps920ab_mfr_id_fops); + + debugfs_create_file("mfr_model", + 0400, + debugfs_dir, + data, + &dps920ab_mfr_model_fops); +} + +static int dps920ab_probe(struct i2c_client *client) +{ + u8 buf[I2C_SMBUS_BLOCK_MAX + 1]; + struct dps920ab_data *data; + int ret; + + data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf); + if (ret < 0) { + dev_err(&client->dev, "Failed to read Manufacturer ID\n"); + return ret; + } + + buf[ret] = '\0'; + if (ret != 5 || strncmp(buf, "DELTA", 5)) { + buf[ret] = '\0'; + dev_err(&client->dev, "Unsupported Manufacturer ID '%s'\n", buf); + return -ENODEV; + } + data->mfr_id = devm_kstrdup(&client->dev, buf, GFP_KERNEL); + if (!data->mfr_id) + return -ENOMEM; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (ret < 0) { + dev_err(&client->dev, "Failed to read Manufacturer Model\n"); + return ret; + } + + buf[ret] = '\0'; + if (ret != 11 || strncmp(buf, "DPS-920AB", 9)) { + dev_err(&client->dev, "Unsupported Manufacturer Model '%s'\n", buf); + return -ENODEV; + } + data->mfr_model = devm_kstrdup(&client->dev, buf, GFP_KERNEL); + if (!data->mfr_model) + return -ENOMEM; + + ret = pmbus_do_probe(client, &dps920ab_info); + if (ret) + return ret; + + dps920ab_init_debugfs(data, client); + + return 0; +} + +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");
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> --- Changes in v4: * Alphabetically order documentation in index.rst * Null terminate manufacturer and mode ID-s * Drop debugfs directory and I2C clients from the global structure, use local variables Changes in v3: * Use generic pmbus_read/write_word_data() * Correct word data return code * Cache PMBUS_MFR_ID and PMBUS_MFR_MODEL instead of reading them everytime that debugfs is read Changes in v2: * Check for Manufacturer and Model * Restrict word read/write to supported only * Update documentation to reflect driver changes * Add basic debugfs entries Documentation/hwmon/dps920ab.rst | 73 +++++++++++ Documentation/hwmon/index.rst | 1 + drivers/hwmon/pmbus/Kconfig | 9 ++ drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/dps920ab.c | 207 +++++++++++++++++++++++++++++++ 5 files changed, 291 insertions(+) create mode 100644 Documentation/hwmon/dps920ab.rst create mode 100644 drivers/hwmon/pmbus/dps920ab.c