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 
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 = &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