hwmon: pmbus: Add Inspur Power System power supply driver (edd2a4d6) · Commits · 戴 / test

Documentation/hwmon/inspur-ipsps1.rst

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		Kernel driver inspur-ipsps1
		=======================

		Supported chips:

		* Inspur Power System power supply unit

		Author: John Wang <wangzqbj@inspur.com>

		Description
		-----------

		This driver supports Inspur Power System power supplies. This driver
		is a client to the core PMBus driver.

		Usage Notes
		-----------

		This driver does not auto-detect devices. You will have to instantiate the
		devices explicitly. Please see Documentation/i2c/instantiating-devices for
		details.

		Sysfs entries
		-------------

		The following attributes are supported:

		======================= ======================================================
		curr1_input Measured input current
		curr1_label "iin"
		curr1_max Maximum current
		curr1_max_alarm Current high alarm
		curr2_input Measured output current in mA.
		curr2_label "iout1"
		curr2_crit Critical maximum current
		curr2_crit_alarm Current critical high alarm
		curr2_max Maximum current
		curr2_max_alarm Current high alarm

		fan1_alarm Fan 1 warning.
		fan1_fault Fan 1 fault.
		fan1_input Fan 1 speed in RPM.

		in1_alarm Input voltage under-voltage alarm.
		in1_input Measured input voltage in mV.
		in1_label "vin"
		in2_input Measured output voltage in mV.
		in2_label "vout1"
		in2_lcrit Critical minimum output voltage
		in2_lcrit_alarm Output voltage critical low alarm
		in2_max Maximum output voltage
		in2_max_alarm Output voltage high alarm
		in2_min Minimum output voltage
		in2_min_alarm Output voltage low alarm

		power1_alarm Input fault or alarm.
		power1_input Measured input power in uW.
		power1_label "pin"
		power1_max Input power limit
		power2_max_alarm Output power high alarm
		power2_max Output power limit
		power2_input Measured output power in uW.
		power2_label "pout"

		temp[1-3]_input Measured temperature
		temp[1-2]_max Maximum temperature
		temp[1-3]_max_alarm Temperature high alarm

		vendor Manufacturer name
		model Product model
		part_number Product part number
		serial_number Product serial number
		fw_version Firmware version
		hw_version Hardware version
		mode Work mode. Can be set to active or
		standby, when set to standby, PSU will
		automatically switch between standby
		and redundancy mode.
		======================= ======================================================

drivers/hwmon/pmbus/Kconfig

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		@@ -46,6 +46,15 @@ config SENSORS_IBM_CFFPS
		This driver can also be built as a module. If so, the module will
		be called ibm-cffps.

		config SENSORS_INSPUR_IPSPS
		tristate "INSPUR Power System Power Supply"
		help
		If you say yes here you get hardware monitoring support for the INSPUR
		Power System power supply.

		This driver can also be built as a module. If so, the module will
		be called inspur-ipsps.

		config SENSORS_IR35221
		tristate "Infineon IR35221"
		help

drivers/hwmon/pmbus/Makefile

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		@@ -7,6 +7,7 @@ obj-$(CONFIG_PMBUS) += pmbus_core.o
		obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
		obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
		obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
		obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
		obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
		obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
		obj-$(CONFIG_SENSORS_IRPS5401) += irps5401.o

drivers/hwmon/pmbus/inspur-ipsps.c

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		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* Copyright 2019 Inspur Corp.
		*/

		#include <linux/debugfs.h>
		#include <linux/device.h>
		#include <linux/fs.h>
		#include <linux/i2c.h>
		#include <linux/module.h>
		#include <linux/pmbus.h>
		#include <linux/hwmon-sysfs.h>

		#include "pmbus.h"

		#define IPSPS_REG_VENDOR_ID 0x99
		#define IPSPS_REG_MODEL 0x9A
		#define IPSPS_REG_FW_VERSION 0x9B
		#define IPSPS_REG_PN 0x9C
		#define IPSPS_REG_SN 0x9E
		#define IPSPS_REG_HW_VERSION 0xB0
		#define IPSPS_REG_MODE 0xFC

		#define MODE_ACTIVE 0x55
		#define MODE_STANDBY 0x0E
		#define MODE_REDUNDANCY 0x00

		#define MODE_ACTIVE_STRING "active"
		#define MODE_STANDBY_STRING "standby"
		#define MODE_REDUNDANCY_STRING "redundancy"

		enum ipsps_index {
		vendor,
		model,
		fw_version,
		part_number,
		serial_number,
		hw_version,
		mode,
		num_regs,
		};

		static const u8 ipsps_regs[num_regs] = {
		[vendor] = IPSPS_REG_VENDOR_ID,
		[model] = IPSPS_REG_MODEL,
		[fw_version] = IPSPS_REG_FW_VERSION,
		[part_number] = IPSPS_REG_PN,
		[serial_number] = IPSPS_REG_SN,
		[hw_version] = IPSPS_REG_HW_VERSION,
		[mode] = IPSPS_REG_MODE,
		};

		static ssize_t ipsps_string_show(struct device *dev,
		struct device_attribute *devattr,
		char *buf)
		{
		u8 reg;
		int rc;
		char *p;
		char data[I2C_SMBUS_BLOCK_MAX + 1];
		struct i2c_client *client = to_i2c_client(dev->parent);
		struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

		reg = ipsps_regs[attr->index];
		rc = i2c_smbus_read_block_data(client, reg, data);
		if (rc < 0)
		return rc;

		/* filled with printable characters, ending with # */
		p = memscan(data, '#', rc);
		*p = '\0';

		return snprintf(buf, PAGE_SIZE, "%s\n", data);
		}

		static ssize_t ipsps_fw_version_show(struct device *dev,
		struct device_attribute *devattr,
		char *buf)
		{
		u8 reg;
		int rc;
		u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 };
		struct i2c_client *client = to_i2c_client(dev->parent);
		struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

		reg = ipsps_regs[attr->index];
		rc = i2c_smbus_read_block_data(client, reg, data);
		if (rc < 0)
		return rc;

		if (rc != 6)
		return -EPROTO;

		return snprintf(buf, PAGE_SIZE, "%u.%02u%u-%u.%02u\n",
		data[1], data[2]/* < 100 /, data[3]/< 10*/,
		data[4], data[5]/* < 100 */);
		}

		static ssize_t ipsps_mode_show(struct device *dev,
		struct device_attribute devattr, char buf)
		{
		u8 reg;
		int rc;
		struct i2c_client *client = to_i2c_client(dev->parent);
		struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

		reg = ipsps_regs[attr->index];
		rc = i2c_smbus_read_byte_data(client, reg);
		if (rc < 0)
		return rc;

		switch (rc) {
		case MODE_ACTIVE:
		return snprintf(buf, PAGE_SIZE, "[%s] %s %s\n",
		MODE_ACTIVE_STRING,
		MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
		case MODE_STANDBY:
		return snprintf(buf, PAGE_SIZE, "%s [%s] %s\n",
		MODE_ACTIVE_STRING,
		MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
		case MODE_REDUNDANCY:
		return snprintf(buf, PAGE_SIZE, "%s %s [%s]\n",
		MODE_ACTIVE_STRING,
		MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
		default:
		return snprintf(buf, PAGE_SIZE, "unspecified\n");
		}
		}

		static ssize_t ipsps_mode_store(struct device *dev,
		struct device_attribute *devattr,
		const char *buf, size_t count)
		{
		u8 reg;
		int rc;
		struct i2c_client *client = to_i2c_client(dev->parent);
		struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);

		reg = ipsps_regs[attr->index];
		if (sysfs_streq(MODE_STANDBY_STRING, buf)) {
		rc = i2c_smbus_write_byte_data(client, reg,
		MODE_STANDBY);
		if (rc < 0)
		return rc;
		return count;
		} else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) {
		rc = i2c_smbus_write_byte_data(client, reg,
		MODE_ACTIVE);
		if (rc < 0)
		return rc;
		return count;
		}

		return -EINVAL;
		}

		static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor);
		static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model);
		static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number);
		static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number);
		static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version);
		static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version);
		static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode);

		static struct attribute *ipsps_attrs[] = {
		&sensor_dev_attr_vendor.dev_attr.attr,
		&sensor_dev_attr_model.dev_attr.attr,
		&sensor_dev_attr_part_number.dev_attr.attr,
		&sensor_dev_attr_serial_number.dev_attr.attr,
		&sensor_dev_attr_hw_version.dev_attr.attr,
		&sensor_dev_attr_fw_version.dev_attr.attr,
		&sensor_dev_attr_mode.dev_attr.attr,
		NULL,
		};

		ATTRIBUTE_GROUPS(ipsps);

		static struct pmbus_driver_info ipsps_info = {
		.pages = 1,
		.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \| PMBUS_HAVE_IOUT \|
		PMBUS_HAVE_IIN \| PMBUS_HAVE_POUT \| PMBUS_HAVE_PIN \|
		PMBUS_HAVE_FAN12 \| PMBUS_HAVE_TEMP \| PMBUS_HAVE_TEMP2 \|
		PMBUS_HAVE_TEMP3 \| PMBUS_HAVE_STATUS_VOUT \|
		PMBUS_HAVE_STATUS_IOUT \| PMBUS_HAVE_STATUS_INPUT \|
		PMBUS_HAVE_STATUS_TEMP \| PMBUS_HAVE_STATUS_FAN12,
		.groups = ipsps_groups,
		};

		static struct pmbus_platform_data ipsps_pdata = {
		.flags = PMBUS_SKIP_STATUS_CHECK,
		};

		static int ipsps_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		client->dev.platform_data = &ipsps_pdata;
		return pmbus_do_probe(client, id, &ipsps_info);
		}

		static const struct i2c_device_id ipsps_id[] = {
		{ "ipsps1", 0 },
		{}
		};
		MODULE_DEVICE_TABLE(i2c, ipsps_id);

		#ifdef CONFIG_OF
		static const struct of_device_id ipsps_of_match[] = {
		{ .compatible = "inspur,ipsps1" },
		{}
		};
		MODULE_DEVICE_TABLE(of, ipsps_of_match);
		#endif

		static struct i2c_driver ipsps_driver = {
		.driver = {
		.name = "inspur-ipsps",
		.of_match_table = of_match_ptr(ipsps_of_match),
		},
		.probe = ipsps_probe,
		.remove = pmbus_do_remove,
		.id_table = ipsps_id,
		};

		module_i2c_driver(ipsps_driver);

		MODULE_AUTHOR("John Wang");
		MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies");
		MODULE_LICENSE("GPL");

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