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(ptr: regmap)) |
42 | return PTR_ERR(ptr: regmap); |
43 | |
44 | return rm3100_common_probe(dev: &spi->dev, regmap, irq: 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" ); |
65 | MODULE_IMPORT_NS(IIO_RM3100); |
66 | |