drivers/iio/magnetometer/hmc5843_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * i2c driver for hmc5843/5843/5883/5883l/5983
   4  *
   5  * Split from hmc5843.c
   6  * Copyright (C) Josef Gajdusek <atx@atx.name>
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/i2c.h>
  11 #include <linux/regmap.h>
  12 #include <linux/iio/iio.h>
  13 #include <linux/iio/triggered_buffer.h>
  14
  15 #include "hmc5843.h"
  16
  17 static const struct regmap_range hmc5843_readable_ranges[] = {
  18         regmap_reg_range(0, HMC5843_ID_END),
  19 };
  20
  21 static const struct regmap_access_table hmc5843_readable_table = {
  22         .yes_ranges = hmc5843_readable_ranges,
  23         .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
  24 };
  25
  26 static const struct regmap_range hmc5843_writable_ranges[] = {
  27         regmap_reg_range(0, HMC5843_MODE_REG),
  28 };
  29
  30 static const struct regmap_access_table hmc5843_writable_table = {
  31         .yes_ranges = hmc5843_writable_ranges,
  32         .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
  33 };
  34
  35 static const struct regmap_range hmc5843_volatile_ranges[] = {
  36         regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
  37 };
  38
  39 static const struct regmap_access_table hmc5843_volatile_table = {
  40         .yes_ranges = hmc5843_volatile_ranges,
  41         .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
  42 };
  43
  44 static const struct regmap_config hmc5843_i2c_regmap_config = {
  45         .reg_bits = 8,
  46         .val_bits = 8,
  47
  48         .rd_table = &hmc5843_readable_table,
  49         .wr_table = &hmc5843_writable_table,
  50         .volatile_table = &hmc5843_volatile_table,
  51
  52         .cache_type = REGCACHE_RBTREE,
  53 };
  54
  55 static int hmc5843_i2c_probe(struct i2c_client *cli)
  56 {
  57         const struct i2c_device_id *id = i2c_client_get_device_id(cli);
  58         struct regmap *regmap = devm_regmap_init_i2c(cli,
  59                         &hmc5843_i2c_regmap_config);
  60         if (IS_ERR(regmap))
  61                 return PTR_ERR(regmap);
  62
  63         return hmc5843_common_probe(&cli->dev,
  64                         regmap,
  65                         id->driver_data, id->name);
  66 }
  67
  68 static void hmc5843_i2c_remove(struct i2c_client *client)
  69 {
  70         hmc5843_common_remove(&client->dev);
  71 }
  72
  73 static const struct i2c_device_id hmc5843_id[] = {
  74         { "hmc5843", HMC5843_ID },
  75         { "hmc5883", HMC5883_ID },
  76         { "hmc5883l", HMC5883L_ID },
  77         { "hmc5983", HMC5983_ID },
  78         { }
  79 };
  80 MODULE_DEVICE_TABLE(i2c, hmc5843_id);
  81
  82 static const struct of_device_id hmc5843_of_match[] = {
  83         { .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID },
  84         { .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID },
  85         { .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID },
  86         { .compatible = "honeywell,hmc5983", .data = (void *)HMC5983_ID },
  87         {}
  88 };
  89 MODULE_DEVICE_TABLE(of, hmc5843_of_match);
  90
  91 static struct i2c_driver hmc5843_driver = {
  92         .driver = {
  93                 .name   = "hmc5843",
  94                 .pm     = pm_sleep_ptr(&hmc5843_pm_ops),
  95                 .of_match_table = hmc5843_of_match,
  96         },
  97         .id_table       = hmc5843_id,
  98         .probe          = hmc5843_i2c_probe,
  99         .remove         = hmc5843_i2c_remove,
 100 };
 101 module_i2c_driver(hmc5843_driver);
 102
 103 MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
 104 MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
 105 MODULE_LICENSE("GPL");
 106 MODULE_IMPORT_NS("IIO_HMC5843");