| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Support for PNI RM3100 3-axis geomagnetic sensor on a i2c bus. |
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| 4 | * |
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| 5 | * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> |
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| 6 | * |
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| 7 | * i2c slave address: 0x20 + SA1 << 1 + SA0. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <linux/i2c.h> |
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| 11 | #include <linux/module.h> |
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| 12 | |
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| 13 | #include "rm3100.h" |
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| 14 | |
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| 15 | static const struct regmap_config rm3100_regmap_config = { |
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| 16 | .reg_bits = 8, |
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| 17 | .val_bits = 8, |
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| 18 | |
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| 19 | .rd_table = &rm3100_readable_table, |
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| 20 | .wr_table = &rm3100_writable_table, |
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| 21 | .volatile_table = &rm3100_volatile_table, |
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| 22 | |
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| 23 | .cache_type = REGCACHE_RBTREE, |
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| 24 | }; |
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| 25 | |
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| 26 | static int rm3100_probe(struct i2c_client *client) |
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| 27 | { |
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| 28 | struct regmap *regmap; |
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| 29 | |
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| 30 | regmap = devm_regmap_init_i2c(client, &rm3100_regmap_config); |
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| 31 | if (IS_ERR(ptr: regmap)) |
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| 32 | return PTR_ERR(ptr: regmap); |
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| 33 | |
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| 34 | return rm3100_common_probe(dev: &client->dev, regmap, irq: client->irq); |
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| 35 | } |
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| 36 | |
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| 37 | static const struct of_device_id rm3100_dt_match[] = { |
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| 38 | { .compatible = "pni,rm3100" , }, |
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| 39 | { } |
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| 40 | }; |
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| 41 | MODULE_DEVICE_TABLE(of, rm3100_dt_match); |
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| 42 | |
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| 43 | static struct i2c_driver rm3100_driver = { |
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| 44 | .driver = { |
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| 45 | .name = "rm3100-i2c" , |
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| 46 | .of_match_table = rm3100_dt_match, |
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| 47 | }, |
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| 48 | .probe = rm3100_probe, |
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| 49 | }; |
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| 50 | module_i2c_driver(rm3100_driver); |
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| 51 | |
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| 52 | MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>" ); |
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| 53 | MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer i2c driver" ); |
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| 54 | MODULE_LICENSE("GPL v2" ); |
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| 55 | MODULE_IMPORT_NS(IIO_RM3100); |
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| 56 | |
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