1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * SPI driver for hmc5983 |
4 | * |
5 | * Copyright (C) Josef Gajdusek <atx@atx.name> |
6 | */ |
7 | |
8 | #include <linux/module.h> |
9 | #include <linux/spi/spi.h> |
10 | #include <linux/iio/iio.h> |
11 | |
12 | #include "hmc5843.h" |
13 | |
14 | static const struct regmap_range hmc5843_readable_ranges[] = { |
15 | regmap_reg_range(0, HMC5843_ID_END), |
16 | }; |
17 | |
18 | static const struct regmap_access_table hmc5843_readable_table = { |
19 | .yes_ranges = hmc5843_readable_ranges, |
20 | .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges), |
21 | }; |
22 | |
23 | static const struct regmap_range hmc5843_writable_ranges[] = { |
24 | regmap_reg_range(0, HMC5843_MODE_REG), |
25 | }; |
26 | |
27 | static const struct regmap_access_table hmc5843_writable_table = { |
28 | .yes_ranges = hmc5843_writable_ranges, |
29 | .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges), |
30 | }; |
31 | |
32 | static const struct regmap_range hmc5843_volatile_ranges[] = { |
33 | regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG), |
34 | }; |
35 | |
36 | static const struct regmap_access_table hmc5843_volatile_table = { |
37 | .yes_ranges = hmc5843_volatile_ranges, |
38 | .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges), |
39 | }; |
40 | |
41 | static const struct regmap_config hmc5843_spi_regmap_config = { |
42 | .reg_bits = 8, |
43 | .val_bits = 8, |
44 | |
45 | .rd_table = &hmc5843_readable_table, |
46 | .wr_table = &hmc5843_writable_table, |
47 | .volatile_table = &hmc5843_volatile_table, |
48 | |
49 | /* Autoincrement address pointer */ |
50 | .read_flag_mask = 0xc0, |
51 | |
52 | .cache_type = REGCACHE_RBTREE, |
53 | }; |
54 | |
55 | static int hmc5843_spi_probe(struct spi_device *spi) |
56 | { |
57 | int ret; |
58 | struct regmap *regmap; |
59 | const struct spi_device_id *id = spi_get_device_id(sdev: spi); |
60 | |
61 | spi->mode = SPI_MODE_3; |
62 | spi->max_speed_hz = 8000000; |
63 | spi->bits_per_word = 8; |
64 | ret = spi_setup(spi); |
65 | if (ret) |
66 | return ret; |
67 | |
68 | regmap = devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config); |
69 | if (IS_ERR(ptr: regmap)) |
70 | return PTR_ERR(ptr: regmap); |
71 | |
72 | return hmc5843_common_probe(dev: &spi->dev, |
73 | regmap, |
74 | id: id->driver_data, name: id->name); |
75 | } |
76 | |
77 | static void hmc5843_spi_remove(struct spi_device *spi) |
78 | { |
79 | hmc5843_common_remove(dev: &spi->dev); |
80 | } |
81 | |
82 | static const struct spi_device_id hmc5843_id[] = { |
83 | { "hmc5983" , HMC5983_ID }, |
84 | { } |
85 | }; |
86 | MODULE_DEVICE_TABLE(spi, hmc5843_id); |
87 | |
88 | static struct spi_driver hmc5843_driver = { |
89 | .driver = { |
90 | .name = "hmc5843" , |
91 | .pm = pm_sleep_ptr(&hmc5843_pm_ops), |
92 | }, |
93 | .id_table = hmc5843_id, |
94 | .probe = hmc5843_spi_probe, |
95 | .remove = hmc5843_spi_remove, |
96 | }; |
97 | |
98 | module_spi_driver(hmc5843_driver); |
99 | |
100 | MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>" ); |
101 | MODULE_DESCRIPTION("HMC5983 SPI driver" ); |
102 | MODULE_LICENSE("GPL" ); |
103 | MODULE_IMPORT_NS(IIO_HMC5843); |
104 | |