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iio: imu: st_lsm6dsx: add i2c embedded controller support

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i2c controller embedded in lsm6dx series can connect up to four
slave devices using accelerometer sensor as trigger for i2c
read/write operations.
Introduce sensor hub support for lsm6dso sensor. Add register map
for lis2mdl magnetometer sensor.
In order to perform single read/write operations st_lsm6dsx driver
relies on SLV0 channel (hw FIFO is not supported yet)

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lorenzo Bianconi 2018-11-11 15:15:33 +01:00 • committed by Jonathan Cameron
parent 1775044356
commit c91c1c844e
5 changed files with 911 additions and 43 deletions
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2
include/linux/platform_data/st_sensors_pdata.h
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@ -18,11 +18,13 @@
* Accelerometer DRDY on LSM330 available only on pin 1 (see datasheet).
* @open_drain: set the interrupt line to be open drain if possible.
* @spi_3wire: enable spi-3wire mode.
* @pullups: enable/disable i2c controller pullup resistors.
*/
struct st_sensors_platform_data {
u8 drdy_int_pin;
bool open_drain;
bool spi_3wire;
bool pullups;
};
#endif /* ST_SENSORS_PDATA_H */