| 1 | |
| 2 | |
| 3 | * STMicroelectronics accelerometers driver
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| 4 | *
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| 5 | * Copyright 2012-2013 STMicroelectronics Inc.
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| 6 | *
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| 7 | * Denis Ciocca <[email protected]>
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| 8 |
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| 9 |
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| 10 | #include <linux/kernel.h>
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| 11 | #include <linux/iio/iio.h>
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| 12 | #include <linux/iio/buffer.h>
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| 13 | #include <linux/iio/trigger.h>
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| 14 | #include <linux/iio/triggered_buffer.h>
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| 15 |
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| 16 | #include <linux/iio/common/st_sensors.h>
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| 17 | #include "st_accel.h"
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| 18 |
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| 19 | int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
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| 20 | {
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| 21 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
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| 22 |
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| 23 | return st_sensors_set_dataready_irq(indio_dev, state);
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| 24 | }
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| 25 |
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| 26 | static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
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| 27 | {
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| 28 | int err;
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| 29 |
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| 30 | err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
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| 31 | if (err < 0)
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| 32 | return err;
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| 33 |
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| 34 | err = st_sensors_set_enable(indio_dev, true);
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| 35 | if (err < 0)
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| 36 | goto st_accel_buffer_enable_all_axis;
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| 37 |
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| 38 | return 0;
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| 39 |
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| 40 | st_accel_buffer_enable_all_axis:
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| 41 | st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
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| 42 | return err;
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| 43 | }
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| 44 |
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| 45 | static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
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| 46 | {
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| 47 | int err;
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| 48 |
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| 49 | err = st_sensors_set_enable(indio_dev, false);
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| 50 | if (err < 0)
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| 51 | return err;
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| 52 |
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| 53 | return st_sensors_set_axis_enable(indio_dev,
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| 54 | ST_SENSORS_ENABLE_ALL_AXIS);
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| 55 | }
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| 56 |
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| 57 | static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
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| 58 | .postenable = &st_accel_buffer_postenable,
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| 59 | .predisable = &st_accel_buffer_predisable,
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| 60 | };
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| 61 |
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| 62 | int st_accel_allocate_ring(struct iio_dev *indio_dev)
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| 63 | {
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| 64 | return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
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| 65 | NULL, &st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
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| 66 | }
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