On 01/04/2012 09:36 AM, Duss Pirmin wrote:
>>> +static struct attribute *ads1110_attributes[] = {
>>> + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
>>> + &iio_dev_attr_sampling_frequency.dev_attr.attr,
>>> + &iio_dev_attr_scale_available.dev_attr.attr,
>>> + &iio_dev_attr_scale.dev_attr.attr,
>> scale wants to be done via infomask element of the iio_chan_spec and
>> relevant element of a switch statement in read raw. That way it will
>> be available via the inkernel interfaces (once we pin down exactly
>> how they will be registered - another discussion entirely...)
>
> Here I need some help.
> I looked at the ad7793 driver how to do this. If I understand it right, this
> driver also has the possibility to change the scale.
> I changed read_raw and added write_raw to the ads1110 driver. When I test
> the driver on my hardware I'm not able to set the gain, there is no sysfs
> attribute for it (on the board runs a 3.1 kernel with a backprot of the
> driver).
Hi,
You need to set the IIO_CHAN_INFO_SCALE_SHARED_BIT in your channels
info_mask attribute in the channel spec.
- Lars
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