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author | Linus Walleij <linus.walleij@linaro.org> | 2016-06-30 03:48:49 +0200 |
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committer | Jonathan Cameron <jic23@kernel.org> | 2016-07-03 11:27:11 +0100 |
commit | 14e8015f8569d9634479a4a461e7c138d60d99ca (patch) | |
tree | f615fa7e7d955050ee6ab8901f4cf052529a4f82 /drivers/iio/pressure/bmp280-i2c.c | |
parent | bd525e6c7521c45785c87d6ecade4e047634cd3c (diff) | |
download | linux-stable-14e8015f8569d9634479a4a461e7c138d60d99ca.tar.gz linux-stable-14e8015f8569d9634479a4a461e7c138d60d99ca.tar.bz2 linux-stable-14e8015f8569d9634479a4a461e7c138d60d99ca.zip |
iio: pressure: bmp280: split driver in logical parts
This splits the BMP280 driver in three logical parts: the core driver
bmp280-core that only operated on a struct device * and a struct regmap *,
the regmap driver bmp280-regmap that can be shared between I2C and other
transports and the I2C module driver bmp280-i2c.
Cleverly bake all functionality into a single object bmp280.o so that
we still get the same module binary built for the device in the end,
without any fuzz exporting symbols to the left and right.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/pressure/bmp280-i2c.c')
-rw-r--r-- | drivers/iio/pressure/bmp280-i2c.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/iio/pressure/bmp280-i2c.c b/drivers/iio/pressure/bmp280-i2c.c new file mode 100644 index 000000000000..7c70ee172bba --- /dev/null +++ b/drivers/iio/pressure/bmp280-i2c.c @@ -0,0 +1,89 @@ +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/acpi.h> +#include <linux/of.h> +#include <linux/regmap.h> + +#include "bmp280.h" + +static int bmp280_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct regmap *regmap; + const struct regmap_config *regmap_config; + + switch (id->driver_data) { + case BMP180_CHIP_ID: + regmap_config = &bmp180_regmap_config; + break; + case BMP280_CHIP_ID: + case BME280_CHIP_ID: + regmap_config = &bmp280_regmap_config; + break; + default: + return -EINVAL; + } + + regmap = devm_regmap_init_i2c(client, regmap_config); + if (IS_ERR(regmap)) { + dev_err(&client->dev, "failed to allocate register map\n"); + return PTR_ERR(regmap); + } + + return bmp280_common_probe(&client->dev, + regmap, + id->driver_data, + id->name); +} + +static int bmp280_i2c_remove(struct i2c_client *client) +{ + return bmp280_common_remove(&client->dev); +} + +static const struct acpi_device_id bmp280_acpi_i2c_match[] = { + {"BMP0280", BMP280_CHIP_ID }, + {"BMP0180", BMP180_CHIP_ID }, + {"BMP0085", BMP180_CHIP_ID }, + {"BME0280", BME280_CHIP_ID }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, bmp280_acpi_i2c_match); + +#ifdef CONFIG_OF +static const struct of_device_id bmp280_of_i2c_match[] = { + { .compatible = "bosch,bme280", .data = (void *)BME280_CHIP_ID }, + { .compatible = "bosch,bmp280", .data = (void *)BMP280_CHIP_ID }, + { .compatible = "bosch,bmp180", .data = (void *)BMP180_CHIP_ID }, + { .compatible = "bosch,bmp085", .data = (void *)BMP180_CHIP_ID }, + { }, +}; +MODULE_DEVICE_TABLE(of, bmp280_of_i2c_match); +#else +#define bmp280_of_i2c_match NULL +#endif + +static const struct i2c_device_id bmp280_i2c_id[] = { + {"bmp280", BMP280_CHIP_ID }, + {"bmp180", BMP180_CHIP_ID }, + {"bmp085", BMP180_CHIP_ID }, + {"bme280", BME280_CHIP_ID }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, bmp280_i2c_id); + +static struct i2c_driver bmp280_i2c_driver = { + .driver = { + .name = "bmp280", + .acpi_match_table = ACPI_PTR(bmp280_acpi_i2c_match), + .of_match_table = of_match_ptr(bmp280_of_i2c_match), + }, + .probe = bmp280_i2c_probe, + .remove = bmp280_i2c_remove, + .id_table = bmp280_i2c_id, +}; +module_i2c_driver(bmp280_i2c_driver); + +MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>"); +MODULE_DESCRIPTION("Driver for Bosch Sensortec BMP180/BMP280 pressure and temperature sensor"); +MODULE_LICENSE("GPL v2"); |