drivers/staging/iio/magnetometer/hmc5843_i2c.c

   1 /*
   2  * i2c driver for hmc5843/5843/5883/5883l/5983
   3  *
   4  * Split from hmc5843.c
   5  * Copyright (C) Josef Gajdusek <atx@atx.name>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * */
  12
  13 #include <linux/module.h>
  14 #include <linux/i2c.h>
  15 #include <linux/regmap.h>
  16 #include <linux/iio/iio.h>
  17 #include <linux/iio/triggered_buffer.h>
  18
  19 #include "hmc5843.h"
  20
  21 static const struct regmap_range hmc5843_readable_ranges[] = {
  22         regmap_reg_range(0, HMC5843_ID_END),
  23 };
  24
  25 static const struct regmap_access_table hmc5843_readable_table = {
  26         .yes_ranges = hmc5843_readable_ranges,
  27         .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
  28 };
  29
  30 static const struct regmap_range hmc5843_writable_ranges[] = {
  31         regmap_reg_range(0, HMC5843_MODE_REG),
  32 };
  33
  34 static const struct regmap_access_table hmc5843_writable_table = {
  35         .yes_ranges = hmc5843_writable_ranges,
  36         .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
  37 };
  38
  39 static const struct regmap_range hmc5843_volatile_ranges[] = {
  40         regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
  41 };
  42
  43 static const struct regmap_access_table hmc5843_volatile_table = {
  44         .yes_ranges = hmc5843_volatile_ranges,
  45         .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
  46 };
  47
  48 static const struct regmap_config hmc5843_i2c_regmap_config = {
  49         .reg_bits = 8,
  50         .val_bits = 8,
  51
  52         .rd_table = &hmc5843_readable_table,
  53         .wr_table = &hmc5843_writable_table,
  54         .volatile_table = &hmc5843_volatile_table,
  55
  56         .cache_type = REGCACHE_RBTREE,
  57 };
  58
  59 static int hmc5843_i2c_probe(struct i2c_client *cli,
  60                              const struct i2c_device_id *id)
  61 {
  62         return hmc5843_common_probe(&cli->dev,
  63                         devm_regmap_init_i2c(cli, &hmc5843_i2c_regmap_config),
  64                         id->driver_data);
  65 }
  66
  67 static int hmc5843_i2c_remove(struct i2c_client *client)
  68 {
  69         return hmc5843_common_remove(&client->dev);
  70 }
  71
  72 static const struct i2c_device_id hmc5843_id[] = {
  73         { "hmc5843", HMC5843_ID },
  74         { "hmc5883", HMC5883_ID },
  75         { "hmc5883l", HMC5883L_ID },
  76         { "hmc5983", HMC5983_ID },
  77         { }
  78 };
  79 MODULE_DEVICE_TABLE(i2c, hmc5843_id);
  80
  81 static const struct of_device_id hmc5843_of_match[] = {
  82         { .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID },
  83         { .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID },
  84         { .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID },
  85         { .compatible = "honeywell,hmc5983", .data = (void *)HMC5983_ID },
  86         {}
  87 };
  88 MODULE_DEVICE_TABLE(of, hmc5843_of_match);
  89
  90 static struct i2c_driver hmc5843_driver = {
  91         .driver = {
  92                 .name   = "hmc5843",
  93                 .pm     = HMC5843_PM_OPS,
  94                 .of_match_table = hmc5843_of_match,
  95         },
  96         .id_table       = hmc5843_id,
  97         .probe          = hmc5843_i2c_probe,
  98         .remove         = hmc5843_i2c_remove,
  99 };
 100 module_i2c_driver(hmc5843_driver);
 101
 102 MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
 103 MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
 104 MODULE_LICENSE("GPL");