1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * STMicroelectronics uvis25 spi driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2017 STMicroelectronics Inc.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/mod_devicetable.h>
13*4882a593Smuzhiyun #include <linux/spi/spi.h>
14*4882a593Smuzhiyun #include <linux/slab.h>
15*4882a593Smuzhiyun #include <linux/regmap.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include "st_uvis25.h"
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define UVIS25_SENSORS_SPI_READ BIT(7)
20*4882a593Smuzhiyun #define UVIS25_SPI_AUTO_INCREMENT BIT(6)
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static const struct regmap_config st_uvis25_spi_regmap_config = {
23*4882a593Smuzhiyun .reg_bits = 8,
24*4882a593Smuzhiyun .val_bits = 8,
25*4882a593Smuzhiyun .read_flag_mask = UVIS25_SENSORS_SPI_READ | UVIS25_SPI_AUTO_INCREMENT,
26*4882a593Smuzhiyun .write_flag_mask = UVIS25_SPI_AUTO_INCREMENT,
27*4882a593Smuzhiyun };
28*4882a593Smuzhiyun
st_uvis25_spi_probe(struct spi_device * spi)29*4882a593Smuzhiyun static int st_uvis25_spi_probe(struct spi_device *spi)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun struct regmap *regmap;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun regmap = devm_regmap_init_spi(spi, &st_uvis25_spi_regmap_config);
34*4882a593Smuzhiyun if (IS_ERR(regmap)) {
35*4882a593Smuzhiyun dev_err(&spi->dev, "Failed to register spi regmap %ld\n",
36*4882a593Smuzhiyun PTR_ERR(regmap));
37*4882a593Smuzhiyun return PTR_ERR(regmap);
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun return st_uvis25_probe(&spi->dev, spi->irq, regmap);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun static const struct of_device_id st_uvis25_spi_of_match[] = {
44*4882a593Smuzhiyun { .compatible = "st,uvis25", },
45*4882a593Smuzhiyun {},
46*4882a593Smuzhiyun };
47*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, st_uvis25_spi_of_match);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun static const struct spi_device_id st_uvis25_spi_id_table[] = {
50*4882a593Smuzhiyun { ST_UVIS25_DEV_NAME },
51*4882a593Smuzhiyun {},
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, st_uvis25_spi_id_table);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static struct spi_driver st_uvis25_driver = {
56*4882a593Smuzhiyun .driver = {
57*4882a593Smuzhiyun .name = "st_uvis25_spi",
58*4882a593Smuzhiyun .pm = &st_uvis25_pm_ops,
59*4882a593Smuzhiyun .of_match_table = st_uvis25_spi_of_match,
60*4882a593Smuzhiyun },
61*4882a593Smuzhiyun .probe = st_uvis25_spi_probe,
62*4882a593Smuzhiyun .id_table = st_uvis25_spi_id_table,
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun module_spi_driver(st_uvis25_driver);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
67*4882a593Smuzhiyun MODULE_DESCRIPTION("STMicroelectronics uvis25 spi driver");
68*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
69