1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * STMicroelectronics hts221 spi driver |
4 | * |
5 | * Copyright 2016 STMicroelectronics Inc. |
6 | * |
7 | * Lorenzo Bianconi <lorenzo.bianconi@st.com> |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/module.h> |
12 | #include <linux/spi/spi.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/regmap.h> |
15 | |
16 | #include "hts221.h" |
17 | |
18 | #define HTS221_SPI_READ BIT(7) |
19 | #define HTS221_SPI_AUTO_INCREMENT BIT(6) |
20 | |
21 | static const struct regmap_config hts221_spi_regmap_config = { |
22 | .reg_bits = 8, |
23 | .val_bits = 8, |
24 | .write_flag_mask = HTS221_SPI_AUTO_INCREMENT, |
25 | .read_flag_mask = HTS221_SPI_READ | HTS221_SPI_AUTO_INCREMENT, |
26 | }; |
27 | |
28 | static int hts221_spi_probe(struct spi_device *spi) |
29 | { |
30 | struct regmap *regmap; |
31 | |
32 | regmap = devm_regmap_init_spi(spi, &hts221_spi_regmap_config); |
33 | if (IS_ERR(ptr: regmap)) { |
34 | dev_err(&spi->dev, "Failed to register spi regmap %ld\n" , |
35 | PTR_ERR(regmap)); |
36 | return PTR_ERR(ptr: regmap); |
37 | } |
38 | |
39 | return hts221_probe(dev: &spi->dev, irq: spi->irq, |
40 | name: spi->modalias, regmap); |
41 | } |
42 | |
43 | static const struct of_device_id hts221_spi_of_match[] = { |
44 | { .compatible = "st,hts221" , }, |
45 | {}, |
46 | }; |
47 | MODULE_DEVICE_TABLE(of, hts221_spi_of_match); |
48 | |
49 | static const struct spi_device_id hts221_spi_id_table[] = { |
50 | { HTS221_DEV_NAME }, |
51 | {}, |
52 | }; |
53 | MODULE_DEVICE_TABLE(spi, hts221_spi_id_table); |
54 | |
55 | static struct spi_driver hts221_driver = { |
56 | .driver = { |
57 | .name = "hts221_spi" , |
58 | .pm = pm_sleep_ptr(&hts221_pm_ops), |
59 | .of_match_table = hts221_spi_of_match, |
60 | }, |
61 | .probe = hts221_spi_probe, |
62 | .id_table = hts221_spi_id_table, |
63 | }; |
64 | module_spi_driver(hts221_driver); |
65 | |
66 | MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>" ); |
67 | MODULE_DESCRIPTION("STMicroelectronics hts221 spi driver" ); |
68 | MODULE_LICENSE("GPL v2" ); |
69 | MODULE_IMPORT_NS(IIO_HTS221); |
70 | |