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 "pmbus.h"
  20
  21 static struct pmbus_driver_info ir38064_info = {
  22         .pages = 1,
  23         .format[PSC_VOLTAGE_IN] = linear,
  24         .format[PSC_VOLTAGE_OUT] = direct,
  25         .format[PSC_CURRENT_OUT] = linear,
  26         .format[PSC_POWER] = linear,
  27         .format[PSC_TEMPERATURE] = linear,
  28         .m[PSC_VOLTAGE_OUT] = 256,
  29         .b[PSC_VOLTAGE_OUT] = 0,
  30         .R[PSC_VOLTAGE_OUT] = 0,
  31         .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT
  32             | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
  33             | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
  34             | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
  35             | PMBUS_HAVE_POUT,
  36 };
  37
  38 static int ir38064_probe(struct i2c_client *client)
  39 {
  40         return pmbus_do_probe(client, &ir38064_info);
  41 }
  42
  43 static const struct i2c_device_id ir38064_id[] = {
  44         {"ir38064", 0},
  45         {}
  46 };
  47
  48 MODULE_DEVICE_TABLE(i2c, ir38064_id);
  49
  50 /* This is the driver that will be inserted */
  51 static struct i2c_driver ir38064_driver = {
  52         .driver = {
  53                    .name = "ir38064",
  54                    },
  55         .probe_new = ir38064_probe,
  56         .id_table = ir38064_id,
  57 };
  58
  59 module_i2c_driver(ir38064_driver);
  60
  61 MODULE_AUTHOR("Maxim Sloyko <maxims@google.com>");
  62 MODULE_DESCRIPTION("PMBus driver for Infineon IR38064");
  63 MODULE_LICENSE("GPL");