1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * STMicroelectronics pressures driver
4 *
5 * Copyright 2013 STMicroelectronics Inc.
6 *
7 * Denis Ciocca <denis.ciocca@st.com>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/slab.h>
13#include <linux/spi/spi.h>
14#include <linux/iio/iio.h>
15
16#include <linux/iio/common/st_sensors.h>
17#include <linux/iio/common/st_sensors_spi.h>
18#include "st_pressure.h"
19
20/*
21 * For new single-chip sensors use <device_name> as compatible string.
22 * For old single-chip devices keep <device_name>-press to maintain
23 * compatibility
24 */
25static const struct of_device_id st_press_of_match[] = {
26	{
27		.compatible = "st,lps001wp-press",
28		.data = LPS001WP_PRESS_DEV_NAME,
29	},
30	{
31		.compatible = "st,lps25h-press",
32		.data = LPS25H_PRESS_DEV_NAME,
33	},
34	{
35		.compatible = "st,lps331ap-press",
36		.data = LPS331AP_PRESS_DEV_NAME,
37	},
38	{
39		.compatible = "st,lps22hb-press",
40		.data = LPS22HB_PRESS_DEV_NAME,
41	},
42	{
43		.compatible = "st,lps33hw",
44		.data = LPS33HW_PRESS_DEV_NAME,
45	},
46	{
47		.compatible = "st,lps35hw",
48		.data = LPS35HW_PRESS_DEV_NAME,
49	},
50	{
51		.compatible = "st,lps22hh",
52		.data = LPS22HH_PRESS_DEV_NAME,
53	},
54	{},
55};
56MODULE_DEVICE_TABLE(of, st_press_of_match);
57
58static int st_press_spi_probe(struct spi_device *spi)
59{
60	const struct st_sensor_settings *settings;
61	struct st_sensor_data *press_data;
62	struct iio_dev *indio_dev;
63	int err;
64
65	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
66
67	settings = st_press_get_settings(spi->modalias);
68	if (!settings) {
69		dev_err(&spi->dev, "device name %s not recognized.\n",
70			spi->modalias);
71		return -ENODEV;
72	}
73
74	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
75	if (!indio_dev)
76		return -ENOMEM;
77
78	press_data = iio_priv(indio_dev);
79	press_data->sensor_settings = (struct st_sensor_settings *)settings;
80
81	err = st_sensors_spi_configure(indio_dev, spi);
82	if (err < 0)
83		return err;
84
85	err = st_sensors_power_enable(indio_dev);
86	if (err)
87		return err;
88
89	err = st_press_common_probe(indio_dev);
90	if (err < 0)
91		goto st_press_power_off;
92
93	return 0;
94
95st_press_power_off:
96	st_sensors_power_disable(indio_dev);
97
98	return err;
99}
100
101static int st_press_spi_remove(struct spi_device *spi)
102{
103	struct iio_dev *indio_dev = spi_get_drvdata(spi);
104
105	st_press_common_remove(indio_dev);
106
107	st_sensors_power_disable(indio_dev);
108
109	return 0;
110}
111
112static const struct spi_device_id st_press_id_table[] = {
113	{ LPS001WP_PRESS_DEV_NAME },
114	{ LPS25H_PRESS_DEV_NAME },
115	{ LPS331AP_PRESS_DEV_NAME },
116	{ LPS22HB_PRESS_DEV_NAME },
117	{ LPS33HW_PRESS_DEV_NAME },
118	{ LPS35HW_PRESS_DEV_NAME },
119	{ LPS22HH_PRESS_DEV_NAME },
120	{},
121};
122MODULE_DEVICE_TABLE(spi, st_press_id_table);
123
124static struct spi_driver st_press_driver = {
125	.driver = {
126		.name = "st-press-spi",
127		.of_match_table = st_press_of_match,
128	},
129	.probe = st_press_spi_probe,
130	.remove = st_press_spi_remove,
131	.id_table = st_press_id_table,
132};
133module_spi_driver(st_press_driver);
134
135MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
136MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
137MODULE_LICENSE("GPL v2");
138