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9d317724cf
Compatible strings are not available on ACPI based systems. This patch adds support to use DSDT information read from platform BIOS instead for probing st pressure sensors. Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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* STMicroelectronics pressures driver
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*
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* Copyright 2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/acpi.h>
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#include <linux/i2c.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/common/st_sensors.h>
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#include <linux/iio/common/st_sensors_i2c.h>
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#include "st_pressure.h"
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#ifdef CONFIG_OF
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static const struct of_device_id st_press_of_match[] = {
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{
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.compatible = "st,lps001wp-press",
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.data = LPS001WP_PRESS_DEV_NAME,
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},
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{
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.compatible = "st,lps25h-press",
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.data = LPS25H_PRESS_DEV_NAME,
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},
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{
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.compatible = "st,lps331ap-press",
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.data = LPS331AP_PRESS_DEV_NAME,
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},
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{
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.compatible = "st,lps22hb-press",
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.data = LPS22HB_PRESS_DEV_NAME,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, st_press_of_match);
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#else
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#define st_press_of_match NULL
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id st_press_acpi_match[] = {
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{"SNO9210", LPS22HB},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
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#else
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#define st_press_acpi_match NULL
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#endif
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static const struct i2c_device_id st_press_id_table[] = {
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{ LPS001WP_PRESS_DEV_NAME, LPS001WP },
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{ LPS25H_PRESS_DEV_NAME, LPS25H },
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{ LPS331AP_PRESS_DEV_NAME, LPS331AP },
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{ LPS22HB_PRESS_DEV_NAME, LPS22HB },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, st_press_id_table);
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static int st_press_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct iio_dev *indio_dev;
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struct st_sensor_data *press_data;
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int ret;
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indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
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if (!indio_dev)
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return -ENOMEM;
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press_data = iio_priv(indio_dev);
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if (client->dev.of_node) {
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st_sensors_of_i2c_probe(client, st_press_of_match);
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} else if (ACPI_HANDLE(&client->dev)) {
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ret = st_sensors_match_acpi_device(&client->dev);
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if ((ret < 0) || (ret >= ST_PRESS_MAX))
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return -ENODEV;
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strncpy(client->name, st_press_id_table[ret].name,
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sizeof(client->name));
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client->name[sizeof(client->name) - 1] = '\0';
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} else if (!id)
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return -ENODEV;
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st_sensors_i2c_configure(indio_dev, client, press_data);
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ret = st_press_common_probe(indio_dev);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int st_press_i2c_remove(struct i2c_client *client)
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{
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st_press_common_remove(i2c_get_clientdata(client));
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return 0;
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}
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static struct i2c_driver st_press_driver = {
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.driver = {
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.name = "st-press-i2c",
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.of_match_table = of_match_ptr(st_press_of_match),
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.acpi_match_table = ACPI_PTR(st_press_acpi_match),
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},
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.probe = st_press_i2c_probe,
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.remove = st_press_i2c_remove,
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.id_table = st_press_id_table,
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};
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module_i2c_driver(st_press_driver);
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
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MODULE_LICENSE("GPL v2");
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