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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Hardware monitoring driver for Infineon IR380644 *5 * Copyright (c) 2017 Google Inc6 *7 * VOUT_MODE is not supported by the device. The driver fakes VOUT linear168 * mode with exponent value -8 as direct mode with m=256/b=0/R=0.9 *10 * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however11 * this driver does not currently support them.12 */13 14#include <linux/err.h>15#include <linux/i2c.h>16#include <linux/init.h>17#include <linux/kernel.h>18#include <linux/module.h>19#include <linux/of.h>20#include <linux/regulator/driver.h>21#include "pmbus.h"22 23#if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR)24static const struct regulator_desc ir38064_reg_desc[] = {25 PMBUS_REGULATOR_ONE("vout"),26};27#endif /* CONFIG_SENSORS_IR38064_REGULATOR */28 29static struct pmbus_driver_info ir38064_info = {30 .pages = 1,31 .format[PSC_VOLTAGE_IN] = linear,32 .format[PSC_VOLTAGE_OUT] = direct,33 .format[PSC_CURRENT_OUT] = linear,34 .format[PSC_POWER] = linear,35 .format[PSC_TEMPERATURE] = linear,36 .m[PSC_VOLTAGE_OUT] = 256,37 .b[PSC_VOLTAGE_OUT] = 0,38 .R[PSC_VOLTAGE_OUT] = 0,39 .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT40 | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP41 | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT42 | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT43 | PMBUS_HAVE_POUT,44#if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR)45 .num_regulators = 1,46 .reg_desc = ir38064_reg_desc,47#endif48};49 50static int ir38064_probe(struct i2c_client *client)51{52 return pmbus_do_probe(client, &ir38064_info);53}54 55static const struct i2c_device_id ir38064_id[] = {56 {"ir38060"},57 {"ir38064"},58 {"ir38164"},59 {"ir38263"},60 {}61};62 63MODULE_DEVICE_TABLE(i2c, ir38064_id);64 65static const struct of_device_id __maybe_unused ir38064_of_match[] = {66 { .compatible = "infineon,ir38060" },67 { .compatible = "infineon,ir38064" },68 { .compatible = "infineon,ir38164" },69 { .compatible = "infineon,ir38263" },70 {}71};72 73MODULE_DEVICE_TABLE(of, ir38064_of_match);74 75/* This is the driver that will be inserted */76static struct i2c_driver ir38064_driver = {77 .driver = {78 .name = "ir38064",79 .of_match_table = of_match_ptr(ir38064_of_match),80 },81 .probe = ir38064_probe,82 .id_table = ir38064_id,83};84 85module_i2c_driver(ir38064_driver);86 87MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");88MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips");89MODULE_LICENSE("GPL");90MODULE_IMPORT_NS(PMBUS);91