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