rm3100-i2c.c 1.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus.
  4. *
  5. * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
  6. *
  7. * i2c slave address: 0x20 + SA1 << 1 + SA0.
  8. */
  9. #include <linux/i2c.h>
  10. #include <linux/module.h>
  11. #include "rm3100.h"
  12. static const struct regmap_config rm3100_regmap_config = {
  13. .reg_bits = 8,
  14. .val_bits = 8,
  15. .rd_table = &rm3100_readable_table,
  16. .wr_table = &rm3100_writable_table,
  17. .volatile_table = &rm3100_volatile_table,
  18. .cache_type = REGCACHE_RBTREE,
  19. };
  20. static int rm3100_probe(struct i2c_client *client)
  21. {
  22. struct regmap *regmap;
  23. regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config);
  24. if (IS_ERR(regmap))
  25. return PTR_ERR(regmap);
  26. return rm3100_common_probe(&client->dev, regmap, client->irq);
  27. }
  28. static const struct of_device_id rm3100_dt_match[] = {
  29. { .compatible = "pni,rm3100", },
  30. { }
  31. };
  32. MODULE_DEVICE_TABLE(of, rm3100_dt_match);
  33. static struct i2c_driver rm3100_driver = {
  34. .driver = {
  35. .name = "rm3100-i2c",
  36. .of_match_table = rm3100_dt_match,
  37. },
  38. .probe_new = rm3100_probe,
  39. };
  40. module_i2c_driver(rm3100_driver);
  41. MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
  42. MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver");
  43. MODULE_LICENSE("GPL v2");