1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * SPI driver for hmc5983
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) Josef Gajdusek <atx@atx.name>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/spi/spi.h>
10*4882a593Smuzhiyun #include <linux/iio/iio.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "hmc5843.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun static const struct regmap_range hmc5843_readable_ranges[] = {
15*4882a593Smuzhiyun regmap_reg_range(0, HMC5843_ID_END),
16*4882a593Smuzhiyun };
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun static const struct regmap_access_table hmc5843_readable_table = {
19*4882a593Smuzhiyun .yes_ranges = hmc5843_readable_ranges,
20*4882a593Smuzhiyun .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static const struct regmap_range hmc5843_writable_ranges[] = {
24*4882a593Smuzhiyun regmap_reg_range(0, HMC5843_MODE_REG),
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun static const struct regmap_access_table hmc5843_writable_table = {
28*4882a593Smuzhiyun .yes_ranges = hmc5843_writable_ranges,
29*4882a593Smuzhiyun .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun static const struct regmap_range hmc5843_volatile_ranges[] = {
33*4882a593Smuzhiyun regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun static const struct regmap_access_table hmc5843_volatile_table = {
37*4882a593Smuzhiyun .yes_ranges = hmc5843_volatile_ranges,
38*4882a593Smuzhiyun .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
39*4882a593Smuzhiyun };
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static const struct regmap_config hmc5843_spi_regmap_config = {
42*4882a593Smuzhiyun .reg_bits = 8,
43*4882a593Smuzhiyun .val_bits = 8,
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun .rd_table = &hmc5843_readable_table,
46*4882a593Smuzhiyun .wr_table = &hmc5843_writable_table,
47*4882a593Smuzhiyun .volatile_table = &hmc5843_volatile_table,
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun /* Autoincrement address pointer */
50*4882a593Smuzhiyun .read_flag_mask = 0xc0,
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun .cache_type = REGCACHE_RBTREE,
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
hmc5843_spi_probe(struct spi_device * spi)55*4882a593Smuzhiyun static int hmc5843_spi_probe(struct spi_device *spi)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun int ret;
58*4882a593Smuzhiyun struct regmap *regmap;
59*4882a593Smuzhiyun const struct spi_device_id *id = spi_get_device_id(spi);
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun spi->mode = SPI_MODE_3;
62*4882a593Smuzhiyun spi->max_speed_hz = 8000000;
63*4882a593Smuzhiyun spi->bits_per_word = 8;
64*4882a593Smuzhiyun ret = spi_setup(spi);
65*4882a593Smuzhiyun if (ret)
66*4882a593Smuzhiyun return ret;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun regmap = devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config);
69*4882a593Smuzhiyun if (IS_ERR(regmap))
70*4882a593Smuzhiyun return PTR_ERR(regmap);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun return hmc5843_common_probe(&spi->dev,
73*4882a593Smuzhiyun regmap,
74*4882a593Smuzhiyun id->driver_data, id->name);
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
hmc5843_spi_remove(struct spi_device * spi)77*4882a593Smuzhiyun static int hmc5843_spi_remove(struct spi_device *spi)
78*4882a593Smuzhiyun {
79*4882a593Smuzhiyun return hmc5843_common_remove(&spi->dev);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun static const struct spi_device_id hmc5843_id[] = {
83*4882a593Smuzhiyun { "hmc5983", HMC5983_ID },
84*4882a593Smuzhiyun { }
85*4882a593Smuzhiyun };
86*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, hmc5843_id);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun static struct spi_driver hmc5843_driver = {
89*4882a593Smuzhiyun .driver = {
90*4882a593Smuzhiyun .name = "hmc5843",
91*4882a593Smuzhiyun .pm = HMC5843_PM_OPS,
92*4882a593Smuzhiyun },
93*4882a593Smuzhiyun .id_table = hmc5843_id,
94*4882a593Smuzhiyun .probe = hmc5843_spi_probe,
95*4882a593Smuzhiyun .remove = hmc5843_spi_remove,
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun module_spi_driver(hmc5843_driver);
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
101*4882a593Smuzhiyun MODULE_DESCRIPTION("HMC5983 SPI driver");
102*4882a593Smuzhiyun MODULE_LICENSE("GPL");
103