mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
597dfb2af0
Adds compatibility with the new sensor generation, the BMP580. The measurement and initialization codepaths are adapted from the device datasheet and the repository from manufacturer at https://github.com/boschsensortec/BMP5-Sensor-API. Signed-off-by: Angel Iglesias <ang.iglesiasg@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/f899fceec9b48bc173bd4b7555f0a237fa32d520.1676823250.git.ang.iglesiasg@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* SPI interface for the BMP280 driver
|
|
*
|
|
* Inspired by the older BMP085 driver drivers/misc/bmp085-spi.c
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/err.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "bmp280.h"
|
|
|
|
static int bmp280_regmap_spi_write(void *context, const void *data,
|
|
size_t count)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
u8 buf[2];
|
|
|
|
memcpy(buf, data, 2);
|
|
/*
|
|
* The SPI register address (= full register address without bit 7) and
|
|
* the write command (bit7 = RW = '0')
|
|
*/
|
|
buf[0] &= ~0x80;
|
|
|
|
return spi_write_then_read(spi, buf, 2, NULL, 0);
|
|
}
|
|
|
|
static int bmp280_regmap_spi_read(void *context, const void *reg,
|
|
size_t reg_size, void *val, size_t val_size)
|
|
{
|
|
struct device *dev = context;
|
|
struct spi_device *spi = to_spi_device(dev);
|
|
|
|
return spi_write_then_read(spi, reg, reg_size, val, val_size);
|
|
}
|
|
|
|
static struct regmap_bus bmp280_regmap_bus = {
|
|
.write = bmp280_regmap_spi_write,
|
|
.read = bmp280_regmap_spi_read,
|
|
.reg_format_endian_default = REGMAP_ENDIAN_BIG,
|
|
.val_format_endian_default = REGMAP_ENDIAN_BIG,
|
|
};
|
|
|
|
static int bmp280_spi_probe(struct spi_device *spi)
|
|
{
|
|
const struct spi_device_id *id = spi_get_device_id(spi);
|
|
const struct bmp280_chip_info *chip_info;
|
|
struct regmap *regmap;
|
|
int ret;
|
|
|
|
spi->bits_per_word = 8;
|
|
ret = spi_setup(spi);
|
|
if (ret < 0) {
|
|
dev_err(&spi->dev, "spi_setup failed!\n");
|
|
return ret;
|
|
}
|
|
|
|
chip_info = device_get_match_data(&spi->dev);
|
|
if (!chip_info)
|
|
chip_info = (const struct bmp280_chip_info *) id->driver_data;
|
|
|
|
regmap = devm_regmap_init(&spi->dev,
|
|
&bmp280_regmap_bus,
|
|
&spi->dev,
|
|
chip_info->regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(&spi->dev, "failed to allocate register map\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
return bmp280_common_probe(&spi->dev,
|
|
regmap,
|
|
chip_info,
|
|
id->name,
|
|
spi->irq);
|
|
}
|
|
|
|
static const struct of_device_id bmp280_of_spi_match[] = {
|
|
{ .compatible = "bosch,bmp085", .data = &bmp180_chip_info },
|
|
{ .compatible = "bosch,bmp180", .data = &bmp180_chip_info },
|
|
{ .compatible = "bosch,bmp181", .data = &bmp180_chip_info },
|
|
{ .compatible = "bosch,bmp280", .data = &bmp280_chip_info },
|
|
{ .compatible = "bosch,bme280", .data = &bmp280_chip_info },
|
|
{ .compatible = "bosch,bmp380", .data = &bmp380_chip_info },
|
|
{ .compatible = "bosch,bmp580", .data = &bmp580_chip_info },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bmp280_of_spi_match);
|
|
|
|
static const struct spi_device_id bmp280_spi_id[] = {
|
|
{ "bmp180", (kernel_ulong_t)&bmp180_chip_info },
|
|
{ "bmp181", (kernel_ulong_t)&bmp180_chip_info },
|
|
{ "bmp280", (kernel_ulong_t)&bmp280_chip_info },
|
|
{ "bme280", (kernel_ulong_t)&bmp280_chip_info },
|
|
{ "bmp380", (kernel_ulong_t)&bmp380_chip_info },
|
|
{ "bmp580", (kernel_ulong_t)&bmp580_chip_info },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, bmp280_spi_id);
|
|
|
|
static struct spi_driver bmp280_spi_driver = {
|
|
.driver = {
|
|
.name = "bmp280",
|
|
.of_match_table = bmp280_of_spi_match,
|
|
.pm = pm_ptr(&bmp280_dev_pm_ops),
|
|
},
|
|
.id_table = bmp280_spi_id,
|
|
.probe = bmp280_spi_probe,
|
|
};
|
|
module_spi_driver(bmp280_spi_driver);
|
|
|
|
MODULE_DESCRIPTION("BMP280 SPI bus driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_IMPORT_NS(IIO_BMP280);
|