LXR linux/drivers/iio/dac/ad5696-i2c.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * AD5338R, AD5671R, AD5673R, AD5675R, AD5677R, AD5691R, AD5692R, AD5693,
   4 * AD5693R, AD5694, AD5694R, AD5695R, AD5696, AD5696R
   5 * Digital to analog converters driver
   6 *
   7 * Copyright 2018 Analog Devices Inc.
   8 */
   9
  10#include "ad5686.h"
  11
  12#include <linux/module.h>
  13#include <linux/i2c.h>
  14
  15static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
  16{
  17        struct i2c_client *i2c = to_i2c_client(st->dev);
  18        struct i2c_msg msg[2] = {
  19                {
  20                        .addr = i2c->addr,
  21                        .flags = i2c->flags,
  22                        .len = 3,
  23                        .buf = &st->data[0].d8[1],
  24                },
  25                {
  26                        .addr = i2c->addr,
  27                        .flags = i2c->flags | I2C_M_RD,
  28                        .len = 2,
  29                        .buf = (char *)&st->data[0].d16,
  30                },
  31        };
  32        int ret;
  33
  34        st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
  35                                      AD5686_ADDR(addr) |
  36                                      0x00);
  37
  38        ret = i2c_transfer(i2c->adapter, msg, 2);
  39        if (ret < 0)
  40                return ret;
  41
  42        return be16_to_cpu(st->data[0].d16);
  43}
  44
  45static int ad5686_i2c_write(struct ad5686_state *st,
  46                            u8 cmd, u8 addr, u16 val)
  47{
  48        struct i2c_client *i2c = to_i2c_client(st->dev);
  49        int ret;
  50
  51        st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
  52                                      | val);
  53
  54        ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
  55        if (ret < 0)
  56                return ret;
  57
  58        return (ret != 3) ? -EIO : 0;
  59}
  60
  61static int ad5686_i2c_probe(struct i2c_client *i2c,
  62                            const struct i2c_device_id *id)
  63{
  64        return ad5686_probe(&i2c->dev, id->driver_data, id->name,
  65                            ad5686_i2c_write, ad5686_i2c_read);
  66}
  67
  68static int ad5686_i2c_remove(struct i2c_client *i2c)
  69{
  70        return ad5686_remove(&i2c->dev);
  71}
  72
  73static const struct i2c_device_id ad5686_i2c_id[] = {
  74        {"ad5311r", ID_AD5311R},
  75        {"ad5338r", ID_AD5338R},
  76        {"ad5671r", ID_AD5671R},
  77        {"ad5673r", ID_AD5673R},
  78        {"ad5675r", ID_AD5675R},
  79        {"ad5677r", ID_AD5677R},
  80        {"ad5691r", ID_AD5691R},
  81        {"ad5692r", ID_AD5692R},
  82        {"ad5693", ID_AD5693},
  83        {"ad5693r", ID_AD5693R},
  84        {"ad5694", ID_AD5694},
  85        {"ad5694r", ID_AD5694R},
  86        {"ad5695r", ID_AD5695R},
  87        {"ad5696", ID_AD5696},
  88        {"ad5696r", ID_AD5696R},
  89        {}
  90};
  91MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
  92
  93static const struct of_device_id ad5686_of_match[] = {
  94        { .compatible = "adi,ad5311r" },
  95        { .compatible = "adi,ad5338r" },
  96        { .compatible = "adi,ad5671r" },
  97        { .compatible = "adi,ad5675r" },
  98        { .compatible = "adi,ad5691r" },
  99        { .compatible = "adi,ad5692r" },
 100        { .compatible = "adi,ad5693" },
 101        { .compatible = "adi,ad5693r" },
 102        { .compatible = "adi,ad5694" },
 103        { .compatible = "adi,ad5694r" },
 104        { .compatible = "adi,ad5695r" },
 105        { .compatible = "adi,ad5696" },
 106        { .compatible = "adi,ad5696r" },
 107        {}
 108};
 109MODULE_DEVICE_TABLE(of, ad5686_of_match);
 110
 111static struct i2c_driver ad5686_i2c_driver = {
 112        .driver = {
 113                .name = "ad5696",
 114                .of_match_table = ad5686_of_match,
 115        },
 116        .probe = ad5686_i2c_probe,
 117        .remove = ad5686_i2c_remove,
 118        .id_table = ad5686_i2c_id,
 119};
 120
 121module_i2c_driver(ad5686_i2c_driver);
 122
 123MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
 124MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
 125MODULE_LICENSE("GPL v2");
 126