hwmon: (pmbus/ir38064) Add driver for Infineon IR38064 Voltage Regulator (00669d19) · Commits · 戴 / test

Documentation/hwmon/ir38064

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		Kernel driver ir38064
		=====================

		Supported chips:
		* Infineon IR38064
		Prefix: 'ir38064'
		Addresses scanned: -
		Datasheet: Publicly available at the Infineon webiste
		https://www.infineon.com/dgdl/Infineon-IR38064MTRPBF-DS-v03_07-EN.pdf?fileId=5546d462584d1d4a0158db0d9efb67ca

		Datasheet is not publicly available.


		Authors:
		Maxim Sloyko <maxims@google.com>
		Patrick Venture <venture@google.com>

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

		IR38064 is a Single-input Voltage, Synchronous Buck Regulator, DC-DC Converter.

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

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

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

		curr1_label "iout1"
		curr1_input Measured output current
		curr1_crit Critical maximum current
		curr1_crit_alarm Current critical high alarm
		curr1_max Maximum current
		curr1_max_alarm Current high alarm

		in1_label "vin"
		in1_input Measured input voltage
		in1_crit Critical maximum input voltage
		in1_crit_alarm Input voltage critical high alarm
		in1_min Minimum input voltage
		in1_min_alarm Input voltage low 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
		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_label "pout1"
		power1_input Measured output power

		temp1_input Measured temperature
		temp1_crit Critical high temperature
		temp1_crit_alarm Chip temperature critical high alarm
		temp1_max Maximum temperature
		temp1_max_alarm Chip temperature high alarm

drivers/hwmon/pmbus/Kconfig

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		@@ -54,6 +54,15 @@ config SENSORS_IR35221
		This driver can also be built as a module. If so, the module will
		be called ir35521.

		config SENSORS_IR38064
		tristate "Infineon IR38064"
		help
		If you say yes here you get hardware monitoring support for Infineon
		IR38064.

		This driver can also be built as a module. If so, the module will
		be called ir38064.

		config SENSORS_LM25066
		tristate "National Semiconductor LM25066 and compatibles"
		help

drivers/hwmon/pmbus/Makefile

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		@@ -8,6 +8,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
		obj-$(CONFIG_SENSORS_ADM1275) += adm1275.o
		obj-$(CONFIG_SENSORS_IBM_CFFPS) += ibm-cffps.o
		obj-$(CONFIG_SENSORS_IR35221) += ir35221.o
		obj-$(CONFIG_SENSORS_IR38064) += ir38064.o
		obj-$(CONFIG_SENSORS_LM25066) += lm25066.o
		obj-$(CONFIG_SENSORS_LTC2978) += ltc2978.o
		obj-$(CONFIG_SENSORS_LTC3815) += ltc3815.o

drivers/hwmon/pmbus/ir38064.c

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		// SPDX-License-Identifier: GPL-2.0+
		/*
		* Hardware monitoring driver for Infineon IR38064
		*
		* Copyright (c) 2017 Google Inc
		*
		* VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
		* mode with exponent value -8 as direct mode with m=256/b=0/R=0.
		*
		* The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
		* this driver does not currently support them.
		*/

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

		static struct pmbus_driver_info ir38064_info = {
		.pages = 1,
		.format[PSC_VOLTAGE_IN] = linear,
		.format[PSC_VOLTAGE_OUT] = direct,
		.format[PSC_CURRENT_OUT] = linear,
		.format[PSC_POWER] = linear,
		.format[PSC_TEMPERATURE] = linear,
		.m[PSC_VOLTAGE_OUT] = 256,
		.b[PSC_VOLTAGE_OUT] = 0,
		.R[PSC_VOLTAGE_OUT] = 0,
		.func[0] = PMBUS_HAVE_VIN \| PMBUS_HAVE_STATUS_INPUT
		\| PMBUS_HAVE_TEMP \| PMBUS_HAVE_STATUS_TEMP
		\| PMBUS_HAVE_VOUT \| PMBUS_HAVE_STATUS_VOUT
		\| PMBUS_HAVE_IOUT \| PMBUS_HAVE_STATUS_IOUT
		\| PMBUS_HAVE_POUT,
		};

		static int ir38064_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		return pmbus_do_probe(client, id, &ir38064_info);
		}

		static const struct i2c_device_id ir38064_id[] = {
		{"ir38064", 0},
		{}
		};

		MODULE_DEVICE_TABLE(i2c, ir38064_id);

		/* This is the driver that will be inserted */
		static struct i2c_driver ir38064_driver = {
		.driver = {
		.name = "ir38064",
		},
		.probe = ir38064_probe,
		.remove = pmbus_do_remove,
		.id_table = ir38064_id,
		};

		module_i2c_driver(ir38064_driver);

		MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
		MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
		MODULE_LICENSE("GPL");

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