hwmon: (pmbus) Add driver for BluTek BPA-RS600 (15b2703e) · Commits · EulixOS / Software / Kernel

Documentation/hwmon/bpa-rs600.rst

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		.. SPDX-License-Identifier: GPL-2.0

		Kernel driver bpa-rs600
		=======================

		Supported chips:

		* BPA-RS600-120

		Datasheet: Publicly available at the BluTek website
		http://blutekpower.com/wp-content/uploads/2019/01/BPA-RS600-120-07-19-2018.pdf

		Authors:
		- Chris Packham <chris.packham@alliedtelesis.co.nz>

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

		The BPA-RS600 is a compact 600W removable power supply module.

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

		This driver does not probe for PMBus devices. You will have to instantiate
		devices explicitly.

		Sysfs attributes
		----------------

		======================= ============================================
		curr1_label "iin"
		curr1_input Measured input current
		curr1_max Maximum input current
		curr1_max_alarm Input current high alarm

		curr2_label "iout1"
		curr2_input Measured output current
		curr2_max Maximum output current
		curr2_max_alarm Output current high alarm

		fan1_input Measured fan speed
		fan1_alarm Fan warning
		fan1_fault Fan fault

		in1_label "vin"
		in1_input Measured input voltage
		in1_max Maximum input voltage
		in1_max_alarm Input voltage high alarm
		in1_min Minimum input voltage
		in1_min_alarm Input voltage low alarm

		in2_label "vout1"
		in2_input Measured output voltage
		in2_max Maximum output voltage
		in2_max_alarm Output voltage high alarm
		in2_min Maximum output voltage
		in2_min_alarm Output voltage low alarm

		power1_label "pin"
		power1_input Measured input power
		power1_alarm Input power alarm
		power1_max Maximum input power

		power2_label "pout1"
		power2_input Measured output power
		power2_max Maximum output power
		power2_max_alarm Output power high alarm

		temp1_input Measured temperature around input connector
		temp1_alarm Temperature alarm

		temp2_input Measured temperature around output connector
		temp2_alarm Temperature alarm
		======================= ============================================

Documentation/hwmon/index.rst

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		@@ -45,6 +45,7 @@ Hardware Monitoring Kernel Drivers
		aspeed-pwm-tacho
		bcm54140
		bel-pfe
		bpa-rs600
		bt1-pvt
		coretemp
		corsair-cpro

drivers/hwmon/pmbus/Kconfig

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		@@ -56,6 +56,15 @@ config SENSORS_BEL_PFE
		This driver can also be built as a module. If so, the module will
		be called bel-pfe.

		config SENSORS_BPA_RS600
		tristate "BluTek BPA-RS600 Power Supplies"
		help
		If you say yes here you get hardware monitoring support for BluTek
		BPA-RS600 Power Supplies.

		This driver can also be built as a module. If so, the module will
		be called bpa-rs600.

		config SENSORS_IBM_CFFPS
		tristate "IBM Common Form Factor Power Supply"
		depends on LEDS_CLASS

drivers/hwmon/pmbus/Makefile

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		@@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
		obj-$(CONFIG_SENSORS_ADM1266) += adm1266.o
		obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
		obj-$(CONFIG_SENSORS_BEL_PFE) += bel-pfe.o
		obj-$(CONFIG_SENSORS_BPA_RS600) += bpa-rs600.o
		obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
		obj-$(CONFIG_SENSORS_INSPUR_IPSPS) += inspur-ipsps.o
		obj-$(CONFIG_SENSORS_IR35221) += ir35221.o

drivers/hwmon/pmbus/bpa-rs600.c

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		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* Hardware monitoring driver for BluTek BPA-RS600 Power Supplies
		*
		* Copyright 2021 Allied Telesis Labs
		*/

		#include <linux/i2c.h>
		#include <linux/init.h>
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/pmbus.h>
		#include "pmbus.h"

		#define BPARS600_MFR_VIN_MIN 0xa0
		#define BPARS600_MFR_VIN_MAX 0xa1
		#define BPARS600_MFR_IIN_MAX 0xa2
		#define BPARS600_MFR_PIN_MAX 0xa3
		#define BPARS600_MFR_VOUT_MIN 0xa4
		#define BPARS600_MFR_VOUT_MAX 0xa5
		#define BPARS600_MFR_IOUT_MAX 0xa6
		#define BPARS600_MFR_POUT_MAX 0xa7

		static int bpa_rs600_read_byte_data(struct i2c_client *client, int page, int reg)
		{
		int ret;

		if (page > 0)
		return -ENXIO;

		switch (reg) {
		case PMBUS_FAN_CONFIG_12:
		/*
		* Two fans are reported in PMBUS_FAN_CONFIG_12 but there is
		* only one fan in the module. Mask out the FAN2 bits.
		*/
		ret = pmbus_read_byte_data(client, 0, PMBUS_FAN_CONFIG_12);
		if (ret >= 0)
		ret &= ~(PB_FAN_2_INSTALLED \| PB_FAN_2_PULSE_MASK);
		break;
		default:
		ret = -ENODATA;
		break;
		}

		return ret;
		}

		static int bpa_rs600_read_word_data(struct i2c_client *client, int page, int phase, int reg)
		{
		int ret;

		if (page > 0)
		return -ENXIO;

		switch (reg) {
		case PMBUS_VIN_UV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MIN);
		break;
		case PMBUS_VIN_OV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VIN_MAX);
		break;
		case PMBUS_VOUT_UV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MIN);
		break;
		case PMBUS_VOUT_OV_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_VOUT_MAX);
		break;
		case PMBUS_IIN_OC_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IIN_MAX);
		break;
		case PMBUS_IOUT_OC_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_IOUT_MAX);
		break;
		case PMBUS_PIN_OP_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_PIN_MAX);
		break;
		case PMBUS_POUT_OP_WARN_LIMIT:
		ret = pmbus_read_word_data(client, 0, 0xff, BPARS600_MFR_POUT_MAX);
		break;
		case PMBUS_VIN_UV_FAULT_LIMIT:
		case PMBUS_VIN_OV_FAULT_LIMIT:
		case PMBUS_VOUT_UV_FAULT_LIMIT:
		case PMBUS_VOUT_OV_FAULT_LIMIT:
		/* These commands return data but it is invalid/un-documented */
		ret = -ENXIO;
		break;
		default:
		if (reg >= PMBUS_VIRT_BASE)
		ret = -ENXIO;
		else
		ret = -ENODATA;
		break;
		}

		return ret;
		}

		static struct pmbus_driver_info bpa_rs600_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_TEMPERATURE] = linear,
		.format[PSC_FAN] = linear,
		.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_VOUT \|
		PMBUS_HAVE_IIN \| PMBUS_HAVE_IOUT \|
		PMBUS_HAVE_PIN \| PMBUS_HAVE_POUT \|
		PMBUS_HAVE_TEMP \| PMBUS_HAVE_TEMP2 \|
		PMBUS_HAVE_FAN12 \|
		PMBUS_HAVE_STATUS_VOUT \| PMBUS_HAVE_STATUS_IOUT \|
		PMBUS_HAVE_STATUS_INPUT \| PMBUS_HAVE_STATUS_TEMP \|
		PMBUS_HAVE_STATUS_FAN12,
		.read_byte_data = bpa_rs600_read_byte_data,
		.read_word_data = bpa_rs600_read_word_data,
		};

		static int bpa_rs600_probe(struct i2c_client *client)
		{
		struct device *dev = &client->dev;
		u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
		int ret;

		if (!i2c_check_functionality(client->adapter,
		I2C_FUNC_SMBUS_READ_BYTE_DATA
		\| I2C_FUNC_SMBUS_READ_WORD_DATA
		\| I2C_FUNC_SMBUS_READ_BLOCK_DATA))
		return -ENODEV;

		ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
		if (ret < 0) {
		dev_err(dev, "Failed to read Manufacturer Model\n");
		return ret;
		}

		if (strncmp(buf, "BPA-RS600", 8)) {
		buf[ret] = '\0';
		dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
		return -ENODEV;
		}

		return pmbus_do_probe(client, &bpa_rs600_info);
		}

		static const struct i2c_device_id bpa_rs600_id[] = {
		{ "bpars600", 0 },
		{},
		};
		MODULE_DEVICE_TABLE(i2c, bpa_rs600_id);

		static const struct of_device_id __maybe_unused bpa_rs600_of_match[] = {
		{ .compatible = "blutek,bpa-rs600" },
		{},
		};
		MODULE_DEVICE_TABLE(of, bpa_rs600_of_match);

		static struct i2c_driver bpa_rs600_driver = {
		.driver = {
		.name = "bpa-rs600",
		.of_match_table = of_match_ptr(bpa_rs600_of_match),
		},
		.probe_new = bpa_rs600_probe,
		.id_table = bpa_rs600_id,
		};

		module_i2c_driver(bpa_rs600_driver);

		MODULE_AUTHOR("Chris Packham");
		MODULE_DESCRIPTION("PMBus driver for BluTek BPA-RS600");
		MODULE_LICENSE("GPL");