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| author | Gwendal Grignou <gwendal@chromium.org> | 2019-07-15 16:14:51 -0700 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-07-27 23:05:25 +0100 |
| commit | 12bf745c9afb6755acba186091bcbb61229f4165 (patch) | |
| tree | 8b5175bf53e45a8ad28e4ba06f8d33f32dd3ef35 | |
| parent | 3cf9df00957fb27cb116761cd4d656aee06e40d3 (diff) | |
| download | lwn-12bf745c9afb6755acba186091bcbb61229f4165.tar.gz lwn-12bf745c9afb6755acba186091bcbb61229f4165.zip | |
iio: cros_ec: Add sign vector in core for backward compatibility
To allow cros_ec iio core library to be used with legacy device, add a
vector to rotate sensor data if necessary: legacy devices are not
reporting data in HTML5/Android sensor referential.
Check the data is not rotated on recent chromebooks that use the HTML5
standard to present sensor data.
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 4 | ||||
| -rw-r--r-- | include/linux/iio/common/cros_ec_sensors_core.h | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c index d02660b1f0fe..3b491cf7be95 100644 --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c @@ -101,6 +101,9 @@ int cros_ec_sensors_core_init(struct platform_device *pdev, } state->type = state->resp->info.type; state->loc = state->resp->info.location; + + /* Set sign vector, only used for backward compatibility. */ + memset(state->sign, 1, CROS_EC_SENSOR_MAX_AXIS); } return 0; @@ -303,6 +306,7 @@ static int cros_ec_sensors_read_data_unsafe(struct iio_dev *indio_dev, if (ret < 0) return ret; + *data *= st->sign[i]; data++; } diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h index bb03a252bd04..6f13c73bac3d 100644 --- a/include/linux/iio/common/cros_ec_sensors_core.h +++ b/include/linux/iio/common/cros_ec_sensors_core.h @@ -66,7 +66,7 @@ struct cros_ec_sensors_core_state { s16 offset; u16 scale; } calib[CROS_EC_SENSOR_MAX_AXIS]; - + s8 sign[CROS_EC_SENSOR_MAX_AXIS]; u8 samples[CROS_EC_SAMPLE_SIZE]; int (*read_ec_sensors_data)(struct iio_dev *indio_dev, |