> -----Original Message----- > From: Jonathan Cameron [mailto:[email protected]] > Sent: 26 December, 2014 15:31 > To: Tirdea, Irina; [email protected] > Cc: [email protected]; Dogaru, Vlad; Baluta, Daniel; Hartmut > Knaack; Lars-Peter Clausen; Peter Meerwald > Subject: Re: [PATCH 4/8] iio: core: Introduce IO_CHAN_INFO_CALIBWEIGHT > > On 19/12/14 22:57, Irina Tirdea wrote: > > Some devices need the weight of the user to compute other > > parameters. One of this devices is Freescale's MMA9553L > > (http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf) > > that needs the weight of the user to compute the number of calories burnt. > > > > Signed-off-by: Irina Tirdea <[email protected]> > > --- > > Documentation/ABI/testing/sysfs-bus-iio | 7 +++++++ > > drivers/iio/industrialio-core.c | 1 + > > include/linux/iio/iio.h | 1 + > > 3 files changed, 9 insertions(+) > > > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio > > b/Documentation/ABI/testing/sysfs-bus-iio > > index 07acef7..e480175 100644 > > --- a/Documentation/ABI/testing/sysfs-bus-iio > > +++ b/Documentation/ABI/testing/sysfs-bus-iio > > @@ -351,6 +351,13 @@ Description: > > to compute the stride length, distance, speed and activity > > type. > > > > +What: /sys/bus/iio/devices/iio:deviceX/in_steps_calibweight > > +KernelVersion: 3.19 > > +Contact: [email protected] > > +Description: > > + Weight of the user (in kg). It is needed by some pedometers > > + to compute the calories burnt by the user. > How about grams? Nice to keep to SI units going forward (I appreciate we > have broken that for what seemed like good reasons at the time) in one > or two places, but it makes it much harder to define consistent interfaces in > the > long run.
According to SI [1] kg is the base unit for mass, so this was the obvious first choice. I have nothing against using grams, but it is not clear to me why using grams would make it easier to define consistent interfaces in the long run. I am probably missing something, so could you please clarify this? Thanks, Irina [1] http://www.bipm.org/en/measurement-units/ > J > > + > > What: > > /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available > > What: /sys/.../iio:deviceX/in_voltageX_scale_available > > What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available > > diff --git a/drivers/iio/industrialio-core.c > > b/drivers/iio/industrialio-core.c > > index 5e50aca..4c435c8 100644 > > --- a/drivers/iio/industrialio-core.c > > +++ b/drivers/iio/industrialio-core.c > > @@ -124,6 +124,7 @@ static const char * const iio_chan_info_postfix[] = { > > [IIO_CHAN_INFO_INT_TIME] = "integration_time", > > [IIO_CHAN_INFO_ENABLE] = "en", > > [IIO_CHAN_INFO_CALIBHEIGHT] = "calibheight", > > + [IIO_CHAN_INFO_CALIBWEIGHT] = "calibweight", > > }; > > > > /** > > diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h > > index 878d861..752a929 100644 > > --- a/include/linux/iio/iio.h > > +++ b/include/linux/iio/iio.h > > @@ -40,6 +40,7 @@ enum iio_chan_info_enum { > > IIO_CHAN_INFO_INT_TIME, > > IIO_CHAN_INFO_ENABLE, > > IIO_CHAN_INFO_CALIBHEIGHT, > > + IIO_CHAN_INFO_CALIBWEIGHT, > > }; > > > > enum iio_shared_by { > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
