1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * STMicroelectronics uvis25 spi driver
4 *
5 * Copyright 2017 STMicroelectronics Inc.
6 *
7 * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/spi/spi.h>
14 #include <linux/slab.h>
15 #include <linux/regmap.h>
16
17 #include "st_uvis25.h"
18
19 #define UVIS25_SENSORS_SPI_READ BIT(7)
20 #define UVIS25_SPI_AUTO_INCREMENT BIT(6)
21
22 static const struct regmap_config st_uvis25_spi_regmap_config = {
23 .reg_bits = 8,
24 .val_bits = 8,
25 .read_flag_mask = UVIS25_SENSORS_SPI_READ | UVIS25_SPI_AUTO_INCREMENT,
26 .write_flag_mask = UVIS25_SPI_AUTO_INCREMENT,
27 };
28
st_uvis25_spi_probe(struct spi_device * spi)29 static int st_uvis25_spi_probe(struct spi_device *spi)
30 {
31 struct regmap *regmap;
32
33 regmap = devm_regmap_init_spi(spi, &st_uvis25_spi_regmap_config);
34 if (IS_ERR(regmap)) {
35 dev_err(&spi->dev, "Failed to register spi regmap %ld\n",
36 PTR_ERR(regmap));
37 return PTR_ERR(regmap);
38 }
39
40 return st_uvis25_probe(&spi->dev, spi->irq, regmap);
41 }
42
43 static const struct of_device_id st_uvis25_spi_of_match[] = {
44 { .compatible = "st,uvis25", },
45 {},
46 };
47 MODULE_DEVICE_TABLE(of, st_uvis25_spi_of_match);
48
49 static const struct spi_device_id st_uvis25_spi_id_table[] = {
50 { ST_UVIS25_DEV_NAME },
51 {},
52 };
53 MODULE_DEVICE_TABLE(spi, st_uvis25_spi_id_table);
54
55 static struct spi_driver st_uvis25_driver = {
56 .driver = {
57 .name = "st_uvis25_spi",
58 .pm = pm_sleep_ptr(&st_uvis25_pm_ops),
59 .of_match_table = st_uvis25_spi_of_match,
60 },
61 .probe = st_uvis25_spi_probe,
62 .id_table = st_uvis25_spi_id_table,
63 };
64 module_spi_driver(st_uvis25_driver);
65
66 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
67 MODULE_DESCRIPTION("STMicroelectronics uvis25 spi driver");
68 MODULE_LICENSE("GPL v2");
69 MODULE_IMPORT_NS(IIO_UVIS25);
70
