RE: [PATCH 1/1] iio: ak8975: Add Ak8975 magnetometer sensor

From: Andrew Chew
Date: Thu Sep 02 2010 - 18:16:38 EST


> > +static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, show_mode,
> store_mode, 0);
> > +static IIO_DEVICE_ATTR(magn_x_calibscale, S_IRUGO,
> show_calibscale, NULL, 0);
> > +static IIO_DEVICE_ATTR(magn_y_calibscale, S_IRUGO,
> show_calibscale, NULL, 1);
> > +static IIO_DEVICE_ATTR(magn_z_calibscale, S_IRUGO,
> show_calibscale, NULL, 2);
> > +static IIO_DEV_ATTR_MAGN_X(show_raw, AK8975_REG_HXL);
> > +static IIO_DEV_ATTR_MAGN_Y(show_raw, AK8975_REG_HYL);
> > +static IIO_DEV_ATTR_MAGN_Z(show_raw, AK8975_REG_HZL);
>
> This seems odd as an interface as it's raw when the maths to provide
> non-raw (and thus abstract and easy for user space) data is trivial
> enough to do in kernel

IIO guys want to do normalization maths above the kernel-level magnetometer IIO layer. This interface came before me, so I'm just following current conventions.--
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