Re: [PATCH] iio:magnetometer: Remove duplications in iio_chan_spec

["Pandruvada, Srinivas" <srinivas.pandruvada@xxxxxxxxx>]

On Wed, 2018-03-07 at 20:20 +0000, Jonathan Cameron wrote:
> On Tue, 6 Mar 2018 09:00:11 -0300
> Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx> wrote:
> 
> > The magn_3d_channels array has multiple declarations of
> > iio_chan_spec.
> > Most of the iio_chan_spec are very similar, changing only by the
> > .type
> > and .channel2 field. This patch reduces the code duplication by
> > adding a
> > macro that can replace the iio_chan_spec  repetitions in the
> > magn_3d_channels array.

I don't think it was tested otherwise channel registration would have
failed. See below.

> > 
> > Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx>
> 
> Whilst this looks fine to me, I'd like Srinivas to take a look before
> I apply it as this is his driver.  Please do make sure to cc the
> author.
> Whilst many such email addresses bounce as they have moved on they
> don't always.
> 
> Jonathan
> 
> > ---
> >  drivers/iio/magnetometer/hid-sensor-magn-3d.c | 83 ++++++---------
> > ------------
> >  1 file changed, 19 insertions(+), 64 deletions(-)
> > 
> > diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
> > b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
> > index a1fd9d591818..fff64711a6c8 100644
> > --- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
> > +++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
> > @@ -74,72 +74,27 @@ static const u32
> > magn_3d_addresses[MAGN_3D_CHANNEL_MAX] = {
> >  	HID_USAGE_SENSOR_ORIENT_TRUE_NORTH,
> >  };
> >  
> > +#define HID_SENSOR_MAGN_3D_AXIS_CHANNEL(channel_type,
> > characteristic)	\
> > +	{								
> > \
> > +		.type = channel_type,				
> > 	\
> > +		.modified = 1,					
> > 	\
> > +		.channel2 = characteristic,			
> > 	\
> > +		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	
> > 	\
> > +		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) | \
> > +					BIT(IIO_CHAN_INFO_SCALE) |
> > 	\
> > +					BIT(IIO_CHAN_INFO_SAMP_FRE
> > Q) |	\
> > +					BIT(IIO_CHAN_INFO_HYSTERES
> > IS),	\
> > +	}								
> > \
> > +
> >  /* Channel definitions */
> >  static const struct iio_chan_spec magn_3d_channels[] = {
> > -	{
> > -		.type = IIO_MAGN,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_X,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_MAGN,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_Y,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_MAGN,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_Z,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_ROT,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_NORTH_MAGN_TILT_COMP,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_ROT,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_NORTH_TRUE_TILT_COMP,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_ROT,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_NORTH_MAGN,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}, {
> > -		.type = IIO_ROT,
> > -		.modified = 1,
> > -		.channel2 = IIO_MOD_NORTH_TRUE,
> > -		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
> > -		.info_mask_shared_by_type =
> > BIT(IIO_CHAN_INFO_OFFSET) |
> > -		BIT(IIO_CHAN_INFO_SCALE) |
> > -		BIT(IIO_CHAN_INFO_SAMP_FREQ) |
> > -		BIT(IIO_CHAN_INFO_HYSTERESIS),
> > -	}
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_MAGN, IIO_MOD_X),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_MAGN, IIO_MOD_Y),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_MAGN, IIO_MOD_Z),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_ROT,
> > IIO_MOD_NORTH_MAGN_TILT_COMP),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_ROT,
> > IIO_MOD_NORTH_TRUE_TILT_COMP),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_ROT,
> > IIO_MOD_NORTH_MAGN),
> > +	HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_ROT,
> > IIO_MOD_NORTH_MAGN),
It should be 
HID_SENSOR_MAGN_3D_AXIS_CHANNEL(IIO_ROT, IIO_MOD_NORTH_TRUE)

Thanks,
Srinivas

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