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