LXR linux/drivers/hwmon/pmbus/max16064.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Hardware monitoring driver for Maxim MAX16064
   4 *
   5 * Copyright (c) 2011 Ericsson AB.
   6 */
   7
   8#include <linux/kernel.h>
   9#include <linux/module.h>
  10#include <linux/init.h>
  11#include <linux/err.h>
  12#include <linux/i2c.h>
  13#include "pmbus.h"
  14
  15#define MAX16064_MFR_VOUT_PEAK          0xd4
  16#define MAX16064_MFR_TEMPERATURE_PEAK   0xd6
  17
  18static int max16064_read_word_data(struct i2c_client *client, int page, int reg)
  19{
  20        int ret;
  21
  22        switch (reg) {
  23        case PMBUS_VIRT_READ_VOUT_MAX:
  24                ret = pmbus_read_word_data(client, page,
  25                                           MAX16064_MFR_VOUT_PEAK);
  26                break;
  27        case PMBUS_VIRT_READ_TEMP_MAX:
  28                ret = pmbus_read_word_data(client, page,
  29                                           MAX16064_MFR_TEMPERATURE_PEAK);
  30                break;
  31        case PMBUS_VIRT_RESET_VOUT_HISTORY:
  32        case PMBUS_VIRT_RESET_TEMP_HISTORY:
  33                ret = 0;
  34                break;
  35        default:
  36                ret = -ENODATA;
  37                break;
  38        }
  39        return ret;
  40}
  41
  42static int max16064_write_word_data(struct i2c_client *client, int page,
  43                                    int reg, u16 word)
  44{
  45        int ret;
  46
  47        switch (reg) {
  48        case PMBUS_VIRT_RESET_VOUT_HISTORY:
  49                ret = pmbus_write_word_data(client, page,
  50                                            MAX16064_MFR_VOUT_PEAK, 0);
  51                break;
  52        case PMBUS_VIRT_RESET_TEMP_HISTORY:
  53                ret = pmbus_write_word_data(client, page,
  54                                            MAX16064_MFR_TEMPERATURE_PEAK,
  55                                            0xffff);
  56                break;
  57        default:
  58                ret = -ENODATA;
  59                break;
  60        }
  61        return ret;
  62}
  63
  64static struct pmbus_driver_info max16064_info = {
  65        .pages = 4,
  66        .format[PSC_VOLTAGE_IN] = direct,
  67        .format[PSC_VOLTAGE_OUT] = direct,
  68        .format[PSC_TEMPERATURE] = direct,
  69        .m[PSC_VOLTAGE_IN] = 19995,
  70        .b[PSC_VOLTAGE_IN] = 0,
  71        .R[PSC_VOLTAGE_IN] = -1,
  72        .m[PSC_VOLTAGE_OUT] = 19995,
  73        .b[PSC_VOLTAGE_OUT] = 0,
  74        .R[PSC_VOLTAGE_OUT] = -1,
  75        .m[PSC_TEMPERATURE] = -7612,
  76        .b[PSC_TEMPERATURE] = 335,
  77        .R[PSC_TEMPERATURE] = -3,
  78        .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_TEMP
  79                | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_TEMP,
  80        .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
  81        .func[2] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
  82        .func[3] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT,
  83        .read_word_data = max16064_read_word_data,
  84        .write_word_data = max16064_write_word_data,
  85};
  86
  87static int max16064_probe(struct i2c_client *client,
  88                          const struct i2c_device_id *id)
  89{
  90        return pmbus_do_probe(client, id, &max16064_info);
  91}
  92
  93static const struct i2c_device_id max16064_id[] = {
  94        {"max16064", 0},
  95        {}
  96};
  97
  98MODULE_DEVICE_TABLE(i2c, max16064_id);
  99
 100/* This is the driver that will be inserted */
 101static struct i2c_driver max16064_driver = {
 102        .driver = {
 103                   .name = "max16064",
 104                   },
 105        .probe = max16064_probe,
 106        .remove = pmbus_do_remove,
 107        .id_table = max16064_id,
 108};
 109
 110module_i2c_driver(max16064_driver);
 111
 112MODULE_AUTHOR("Guenter Roeck");
 113MODULE_DESCRIPTION("PMBus driver for Maxim MAX16064");
 114MODULE_LICENSE("GPL");
 115