LXR linux/drivers/hwmon/pmbus/tps53679.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Hardware monitoring driver for Texas Instruments TPS53679
   4 *
   5 * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
   6 * Copyright (c) 2017 Vadim Pasternak <vadimp@mellanox.com>
   7 */
   8
   9#include <linux/err.h>
  10#include <linux/i2c.h>
  11#include <linux/init.h>
  12#include <linux/kernel.h>
  13#include <linux/module.h>
  14#include "pmbus.h"
  15
  16#define TPS53679_PROT_VR12_5MV          0x01 /* VR12.0 mode, 5-mV DAC */
  17#define TPS53679_PROT_VR12_5_10MV       0x02 /* VR12.5 mode, 10-mV DAC */
  18#define TPS53679_PROT_VR13_10MV         0x04 /* VR13.0 mode, 10-mV DAC */
  19#define TPS53679_PROT_IMVP8_5MV         0x05 /* IMVP8 mode, 5-mV DAC */
  20#define TPS53679_PROT_VR13_5MV          0x07 /* VR13.0 mode, 5-mV DAC */
  21#define TPS53679_PAGE_NUM               2
  22
  23static int tps53679_identify(struct i2c_client *client,
  24                             struct pmbus_driver_info *info)
  25{
  26        u8 vout_params;
  27        int ret;
  28
  29        /* Read the register with VOUT scaling value.*/
  30        ret = pmbus_read_byte_data(client, 0, PMBUS_VOUT_MODE);
  31        if (ret < 0)
  32                return ret;
  33
  34        vout_params = ret & GENMASK(4, 0);
  35
  36        switch (vout_params) {
  37        case TPS53679_PROT_VR13_10MV:
  38        case TPS53679_PROT_VR12_5_10MV:
  39                info->vrm_version = vr13;
  40                break;
  41        case TPS53679_PROT_VR13_5MV:
  42        case TPS53679_PROT_VR12_5MV:
  43        case TPS53679_PROT_IMVP8_5MV:
  44                info->vrm_version = vr12;
  45                break;
  46        default:
  47                return -EINVAL;
  48        }
  49
  50        return 0;
  51}
  52
  53static struct pmbus_driver_info tps53679_info = {
  54        .pages = TPS53679_PAGE_NUM,
  55        .format[PSC_VOLTAGE_IN] = linear,
  56        .format[PSC_VOLTAGE_OUT] = vid,
  57        .format[PSC_TEMPERATURE] = linear,
  58        .format[PSC_CURRENT_OUT] = linear,
  59        .format[PSC_POWER] = linear,
  60        .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
  61                PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
  62                PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
  63                PMBUS_HAVE_POUT,
  64        .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
  65                PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
  66                PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
  67                PMBUS_HAVE_POUT,
  68        .identify = tps53679_identify,
  69};
  70
  71static int tps53679_probe(struct i2c_client *client,
  72                          const struct i2c_device_id *id)
  73{
  74        struct pmbus_driver_info *info;
  75
  76        info = devm_kmemdup(&client->dev, &tps53679_info, sizeof(*info),
  77                            GFP_KERNEL);
  78        if (!info)
  79                return -ENOMEM;
  80
  81        return pmbus_do_probe(client, id, info);
  82}
  83
  84static const struct i2c_device_id tps53679_id[] = {
  85        {"tps53679", 0},
  86        {}
  87};
  88
  89MODULE_DEVICE_TABLE(i2c, tps53679_id);
  90
  91static const struct of_device_id __maybe_unused tps53679_of_match[] = {
  92        {.compatible = "ti,tps53679"},
  93        {}
  94};
  95MODULE_DEVICE_TABLE(of, tps53679_of_match);
  96
  97static struct i2c_driver tps53679_driver = {
  98        .driver = {
  99                .name = "tps53679",
 100                .of_match_table = of_match_ptr(tps53679_of_match),
 101        },
 102        .probe = tps53679_probe,
 103        .remove = pmbus_do_remove,
 104        .id_table = tps53679_id,
 105};
 106
 107module_i2c_driver(tps53679_driver);
 108
 109MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
 110MODULE_DESCRIPTION("PMBus driver for Texas Instruments TPS53679");
 111MODULE_LICENSE("GPL");
 112