Commit | Line | Data |
---|---|---|
121354b2 SQ |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus. | |
4 | * | |
5 | * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com> | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | #include <linux/spi/spi.h> | |
10 | ||
11 | #include "rm3100.h" | |
12 | ||
13 | static const struct regmap_config rm3100_regmap_config = { | |
14 | .reg_bits = 8, | |
15 | .val_bits = 8, | |
16 | ||
17 | .rd_table = &rm3100_readable_table, | |
18 | .wr_table = &rm3100_writable_table, | |
19 | .volatile_table = &rm3100_volatile_table, | |
20 | ||
21 | .read_flag_mask = 0x80, | |
22 | ||
23 | .cache_type = REGCACHE_RBTREE, | |
24 | }; | |
25 | ||
26 | static int rm3100_probe(struct spi_device *spi) | |
27 | { | |
28 | struct regmap *regmap; | |
29 | int ret; | |
30 | ||
31 | /* Actually this device supports both mode 0 and mode 3. */ | |
32 | spi->mode = SPI_MODE_0; | |
33 | /* Data rates cannot exceed 1Mbits. */ | |
34 | spi->max_speed_hz = 1000000; | |
35 | spi->bits_per_word = 8; | |
36 | ret = spi_setup(spi); | |
37 | if (ret) | |
38 | return ret; | |
39 | ||
40 | regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config); | |
41 | if (IS_ERR(regmap)) | |
42 | return PTR_ERR(regmap); | |
43 | ||
44 | return rm3100_common_probe(&spi->dev, regmap, spi->irq); | |
45 | } | |
46 | ||
47 | static const struct of_device_id rm3100_dt_match[] = { | |
48 | { .compatible = "pni,rm3100", }, | |
49 | { } | |
50 | }; | |
51 | MODULE_DEVICE_TABLE(of, rm3100_dt_match); | |
52 | ||
53 | static struct spi_driver rm3100_driver = { | |
54 | .driver = { | |
55 | .name = "rm3100-spi", | |
56 | .of_match_table = rm3100_dt_match, | |
57 | }, | |
58 | .probe = rm3100_probe, | |
59 | }; | |
60 | module_spi_driver(rm3100_driver); | |
61 | ||
62 | MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>"); | |
63 | MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver"); | |
64 | MODULE_LICENSE("GPL v2"); | |
230ee6c6 | 65 | MODULE_IMPORT_NS(IIO_RM3100); |