forked from Minki/linux
e5aab7b0d8
Initial support for ST LPS22HH pressure sensor. Datasheet: http://www2.st.com/resource/en/datasheet/lps22hh.pdf Features: * pressure, temperature data and timestamping channels * sampling frequency selection [1..200] Hz * interrupt based trigger * over I2C or SPI interface Signed-off-by: mario tesi <mario.tesi@st.com> Acked-by: Denis Ciocca <denis.ciocca@st.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
138 lines
3.1 KiB
C
138 lines
3.1 KiB
C
/*
|
|
* STMicroelectronics pressures driver
|
|
*
|
|
* Copyright 2013 STMicroelectronics Inc.
|
|
*
|
|
* Denis Ciocca <denis.ciocca@st.com>
|
|
*
|
|
* Licensed under the GPL-2.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/iio/iio.h>
|
|
|
|
#include <linux/iio/common/st_sensors.h>
|
|
#include <linux/iio/common/st_sensors_i2c.h>
|
|
#include "st_pressure.h"
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id st_press_of_match[] = {
|
|
{
|
|
.compatible = "st,lps001wp-press",
|
|
.data = LPS001WP_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps25h-press",
|
|
.data = LPS25H_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps331ap-press",
|
|
.data = LPS331AP_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps22hb-press",
|
|
.data = LPS22HB_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps33hw",
|
|
.data = LPS33HW_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps35hw",
|
|
.data = LPS35HW_PRESS_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lps22hh",
|
|
.data = LPS22HH_PRESS_DEV_NAME,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, st_press_of_match);
|
|
#else
|
|
#define st_press_of_match NULL
|
|
#endif
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id st_press_acpi_match[] = {
|
|
{"SNO9210", LPS22HB},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
|
|
#else
|
|
#define st_press_acpi_match NULL
|
|
#endif
|
|
|
|
static const struct i2c_device_id st_press_id_table[] = {
|
|
{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
|
|
{ LPS25H_PRESS_DEV_NAME, LPS25H },
|
|
{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
|
|
{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
|
|
{ LPS33HW_PRESS_DEV_NAME, LPS33HW },
|
|
{ LPS35HW_PRESS_DEV_NAME, LPS35HW },
|
|
{ LPS22HH_PRESS_DEV_NAME, LPS22HH },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, st_press_id_table);
|
|
|
|
static int st_press_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct iio_dev *indio_dev;
|
|
struct st_sensor_data *press_data;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
press_data = iio_priv(indio_dev);
|
|
|
|
if (client->dev.of_node) {
|
|
st_sensors_of_name_probe(&client->dev, st_press_of_match,
|
|
client->name, sizeof(client->name));
|
|
} else if (ACPI_HANDLE(&client->dev)) {
|
|
ret = st_sensors_match_acpi_device(&client->dev);
|
|
if ((ret < 0) || (ret >= ST_PRESS_MAX))
|
|
return -ENODEV;
|
|
|
|
strlcpy(client->name, st_press_id_table[ret].name,
|
|
sizeof(client->name));
|
|
} else if (!id)
|
|
return -ENODEV;
|
|
|
|
st_sensors_i2c_configure(indio_dev, client, press_data);
|
|
|
|
ret = st_press_common_probe(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_press_i2c_remove(struct i2c_client *client)
|
|
{
|
|
st_press_common_remove(i2c_get_clientdata(client));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver st_press_driver = {
|
|
.driver = {
|
|
.name = "st-press-i2c",
|
|
.of_match_table = of_match_ptr(st_press_of_match),
|
|
.acpi_match_table = ACPI_PTR(st_press_acpi_match),
|
|
},
|
|
.probe = st_press_i2c_probe,
|
|
.remove = st_press_i2c_remove,
|
|
.id_table = st_press_id_table,
|
|
};
|
|
module_i2c_driver(st_press_driver);
|
|
|
|
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
|
|
MODULE_LICENSE("GPL v2");
|