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iio: gyro: bmi055 gyro sensor driver

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Add support for the BMI055 gyroscope sensor. BMI055 is a package
consisting of an acceleration sensor and a gyroscope. This patch
adds support for the gyroscope only.

Spec downloaded from:
http://ae-bst.resource.bosch.com/media/products/dokumente/bmi055/BST-BMI055-DS000-06.pdf

The BMI055 gyroscope uses the same register definition as BMG160,
but does not specify a temp register. However, the temp register
seems to be working in the same way as for BMG160, so this patch
does not remove the temp channel for BMI055.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Irina Tirdea 2014-02-09 11:59:00 +00:00 committed by Jonathan Cameron
parent c9bf2373da
commit 3a0888edcf
2 changed files with 28 additions and 13 deletions
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2
drivers/iio/gyro/Kconfig
View File

@ -56,7 +56,7 @@ config BMG160
select IIO_TRIGGERED_BUFFER if IIO_BUFFER
help
Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
driver.
driver. This driver also supports BMI055 gyroscope.
This driver can also be built as a module. If so, the module
will be called bmg160.

39
drivers/iio/gyro/bmg160.c
View File

@ -949,10 +949,10 @@ static irqreturn_t bmg160_data_rdy_trig_poll(int irq, void *private)
}
static int bmg160_acpi_gpio_probe(struct i2c_client *client,
struct bmg160_data *data)
static int bmg160_gpio_probe(struct i2c_client *client,
struct bmg160_data *data)
{
const struct acpi_device_id *id;
struct device *dev;
struct gpio_desc *gpio;
int ret;
@ -961,12 +961,6 @@ static int bmg160_acpi_gpio_probe(struct i2c_client *client,
return -EINVAL;
dev = &client->dev;
if (!ACPI_HANDLE(dev))
return -ENODEV;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return -ENODEV;
/* data ready gpio interrupt pin */
gpio = devm_gpiod_get_index(dev, BMG160_GPIO_NAME, 0);
@ -986,12 +980,24 @@ static int bmg160_acpi_gpio_probe(struct i2c_client *client,
return ret;
}
static const char *bmg160_match_acpi_device(struct device *dev)
{
const struct acpi_device_id *id;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return NULL;
return dev_name(dev);
}
static int bmg160_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct bmg160_data *data;
struct iio_dev *indio_dev;
int ret;
const char *name = NULL;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
@ -1007,15 +1013,21 @@ static int bmg160_probe(struct i2c_client *client,
mutex_init(&data->mutex);
if (id)
name = id->name;
if (ACPI_HANDLE(&client->dev))
name = bmg160_match_acpi_device(&client->dev);
indio_dev->dev.parent = &client->dev;
indio_dev->channels = bmg160_channels;
indio_dev->num_channels = ARRAY_SIZE(bmg160_channels);
indio_dev->name = BMG160_DRV_NAME;
indio_dev->name = name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &bmg160_info;
if (client->irq <= 0)
client->irq = bmg160_acpi_gpio_probe(client, data);
client->irq = bmg160_gpio_probe(client, data);
if (client->irq > 0) {
ret = devm_request_threaded_irq(&client->dev,
@ -1185,12 +1197,15 @@ static const struct dev_pm_ops bmg160_pm_ops = {
static const struct acpi_device_id bmg160_acpi_match[] = {
{"BMG0160", 0},
{ },
{"BMI055B", 0},
{},
};
MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
static const struct i2c_device_id bmg160_id[] = {
{"bmg160", 0},
{"bmi055_gyro", 0},
{}
};