cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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st_pressure_spi.c (2855B)

      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/mod_devicetable.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	return st_press_common_probe(indio_dev);
     90}
     91
     92static const struct spi_device_id st_press_id_table[] = {
     93	{ LPS001WP_PRESS_DEV_NAME },
     94	{ LPS25H_PRESS_DEV_NAME },
     95	{ LPS331AP_PRESS_DEV_NAME },
     96	{ LPS22HB_PRESS_DEV_NAME },
     97	{ LPS33HW_PRESS_DEV_NAME },
     98	{ LPS35HW_PRESS_DEV_NAME },
     99	{ LPS22HH_PRESS_DEV_NAME },
    100	{ "lps001wp-press" },
    101	{ "lps25h-press", },
    102	{ "lps331ap-press" },
    103	{ "lps22hb-press" },
    104	{},
    105};
    106MODULE_DEVICE_TABLE(spi, st_press_id_table);
    107
    108static struct spi_driver st_press_driver = {
    109	.driver = {
    110		.name = "st-press-spi",
    111		.of_match_table = st_press_of_match,
    112	},
    113	.probe = st_press_spi_probe,
    114	.id_table = st_press_id_table,
    115};
    116module_spi_driver(st_press_driver);
    117
    118MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
    119MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
    120MODULE_LICENSE("GPL v2");
    121MODULE_IMPORT_NS(IIO_ST_SENSORS);