On 07/05/2013 10:30 AM, Hector Palacios wrote:
[...]
> +#define SHOW_SCALE_AVAILABLE_FUNC(ch) \
> +static ssize_t mxs_lradc_show_scale_available##ch(struct device *dev, \
> + struct device_attribute *attr, \
> + char *buf) \
> +{ \
> + return c ch); \
> +}
No need for a separate function for each channel. Use the address attribute
of the iio_dev_attr. E.g.
struct iio_dev_attr *iio_attr = to_iio_dev_attr(attr);
return mxs_lradc_show_scale_available_ch(dev, attr, buf, iio_attr->address);
The last parameter to IIO_DEVICE_ATTR initializes this field.
But I think you can need less boilerplate code if you use the
iio_chan_spec_ext_info feature. Take a look at IIO_ENUM_AVAILABLE and
friends to see how it is done.
- Lars
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