drivers/hwmon/pmbus/ir38064.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Hardware monitoring driver for Infineon IR38064
   4  *
   5  * Copyright (c) 2017 Google Inc
   6  *
   7  * VOUT_MODE is not supported by the device. The driver fakes VOUT linear16
   8  * 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, however
  11  * 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)
  24 static const struct regulator_desc ir38064_reg_desc[] = {
  25         PMBUS_REGULATOR_ONE("vout"),
  26 };
  27 #endif /* CONFIG_SENSORS_IR38064_REGULATOR */
  28
  29 static 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_INPUT
  40             | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
  41             | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
  42             | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
  43             | PMBUS_HAVE_POUT,
  44 #if IS_ENABLED(CONFIG_SENSORS_IR38064_REGULATOR)
  45         .num_regulators = 1,
  46         .reg_desc = ir38064_reg_desc,
  47 #endif
  48 };
  49
  50 static int ir38064_probe(struct i2c_client *client)
  51 {
  52         return pmbus_do_probe(client, &ir38064_info);
  53 }
  54
  55 static const struct i2c_device_id ir38064_id[] = {
  56         {"ir38060"},
  57         {"ir38064"},
  58         {"ir38164"},
  59         {"ir38263"},
  60         {}
  61 };
  62
  63 MODULE_DEVICE_TABLE(i2c, ir38064_id);
  64
  65 static 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
  73 MODULE_DEVICE_TABLE(of, ir38064_of_match);
  74
  75 /* This is the driver that will be inserted */
  76 static 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
  85 module_i2c_driver(ir38064_driver);
  86
  87 MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
  88 MODULE_DESCRIPTION("PMBus driver for Infineon IR38064 and compatible chips");
  89 MODULE_LICENSE("GPL");
  90 MODULE_IMPORT_NS("PMBUS");