hwmon/pmbus/ir38064.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Hardware monitoring driver for Infineon IR38064
0004  *
0005  * Copyright (c) 2017 Google Inc
0006  *
0007  * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
0008  * mode with exponent value -8 as direct mode with m=256/b=0/R=0.
0009  *
0010  * The device supports VOUT_PEAK, IOUT_PEAK, and TEMPERATURE_PEAK, however
0011  * this driver does not currently support them.
0012  */
0013
0014 #include <linux/err.h>
0015 #include <linux/i2c.h>
0016 #include <linux/init.h>
0017 #include <linux/kernel.h>
0018 #include <linux/module.h>
0019 #include <linux/of_device.h>
0020 #include <linux/regulator/driver.h>
0021 #include "pmbus.h"
0022
0023 #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR)
0024 static const struct regulator_desc ir38064_reg_desc[] = {
0025     PMBUS_REGULATOR("vout", 0),
0026 };
0027 #endif /* CONFIG_SENSORS_IR38064_REGULATOR */
0028
0029 static struct pmbus_driver_info ir38064_info = {
0030     .pages = 1,
0031     .format[PSC_VOLTAGE_IN] = linear,
0032     .format[PSC_VOLTAGE_OUT] = direct,
0033     .format[PSC_CURRENT_OUT] = linear,
0034     .format[PSC_POWER] = linear,
0035     .format[PSC_TEMPERATURE] = linear,
0036     .m[PSC_VOLTAGE_OUT] = 256,
0037     .b[PSC_VOLTAGE_OUT] = 0,
0038     .R[PSC_VOLTAGE_OUT] = 0,
0039     .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
0040         | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
0041         | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
0042         | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
0043         | PMBUS_HAVE_POUT,
0044 #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR)
0045     .num_regulators = 1,
0046     .reg_desc = ir38064_reg_desc,
0047 #endif
0048 };
0049
0050 static int ir38064_probe(struct i2c_client *client)
0051 {
0052     return pmbus_do_probe(client, &ir38064_info);
0053 }
0054
0055 static const struct i2c_device_id ir38064_id[] = {
0056     {"ir38060", 0},
0057     {"ir38064", 0},
0058     {"ir38164", 0},
0059     {"ir38263", 0},
0060     {}
0061 };
0062
0063 MODULE_DEVICE_TABLE(i2c, ir38064_id);
0064
0065 static const struct of_device_id __maybe_unused ir38064_of_match[] = {
0066     { .compatible = "infineon,ir38060" },
0067     { .compatible = "infineon,ir38064" },
0068     { .compatible = "infineon,ir38164" },
0069     { .compatible = "infineon,ir38263" },
0070     {}
0071 };
0072
0073 MODULE_DEVICE_TABLE(of, ir38064_of_match);
0074
0075 /* This is the driver that will be inserted */
0076 static struct i2c_driver ir38064_driver = {
0077     .driver = {
0078            .name = "ir38064",
0079            .of_match_table = of_match_ptr(ir38064_of_match),
0080            },
0081     .probe_new = ir38064_probe,
0082     .id_table = ir38064_id,
0083 };
0084
0085 module_i2c_driver(ir38064_driver);
0086
0087 MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
0088 MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips");
0089 MODULE_LICENSE("GPL");
0090 MODULE_IMPORT_NS(PMBUS);