Messages in this thread | | | Date | Sat, 15 Mar 2014 15:42:25 +0000 | From | Jonathan Cameron <> | Subject | Re: [PATCHv3 9/9] iio: inkern: add iio_read_channel_average_raw |
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On 10/03/14 17:25, Sebastian Reichel wrote: > Add iio_read_channel_average_raw to support reading > averaged raw values in consumer drivers. > > Signed-off-by: Sebastian Reichel <sre@debian.org> As this one also stands fine on it's own and isn't actually used by the rest of the patch set - applied to the togreg branch of iio.git This will get pushed out initially as 'testing' for the autobuilders to play.
Jonathan > --- > drivers/iio/inkern.c | 18 ++++++++++++++++++ > include/linux/iio/consumer.h | 13 +++++++++++++ > 2 files changed, 31 insertions(+) > > diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c > index 0cf5f8e..adeba5a 100644 > --- a/drivers/iio/inkern.c > +++ b/drivers/iio/inkern.c > @@ -443,6 +443,24 @@ err_unlock: > } > EXPORT_SYMBOL_GPL(iio_read_channel_raw); > > +int iio_read_channel_average_raw(struct iio_channel *chan, int *val) > +{ > + int ret; > + > + mutex_lock(&chan->indio_dev->info_exist_lock); > + if (chan->indio_dev->info == NULL) { > + ret = -ENODEV; > + goto err_unlock; > + } > + > + ret = iio_channel_read(chan, val, NULL, IIO_CHAN_INFO_AVERAGE_RAW); > +err_unlock: > + mutex_unlock(&chan->indio_dev->info_exist_lock); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(iio_read_channel_average_raw); > + > static int iio_convert_raw_to_processed_unlocked(struct iio_channel *chan, > int raw, int *processed, unsigned int scale) > { > diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h > index 2752b1f..651f9a0 100644 > --- a/include/linux/iio/consumer.h > +++ b/include/linux/iio/consumer.h > @@ -123,6 +123,19 @@ int iio_read_channel_raw(struct iio_channel *chan, > int *val); > > /** > + * iio_read_channel_average_raw() - read from a given channel > + * @chan: The channel being queried. > + * @val: Value read back. > + * > + * Note raw reads from iio channels are in adc counts and hence > + * scale will need to be applied if standard units required. > + * > + * In opposit to the normal iio_read_channel_raw this function > + * returns the average of multiple reads. > + */ > +int iio_read_channel_average_raw(struct iio_channel *chan, int *val); > + > +/** > * iio_read_channel_processed() - read processed value from a given channel > * @chan: The channel being queried. > * @val: Value read back. >
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