Re: STMicroelectronics accelerometers driver.

[Denis CIOCCA <denis.ciocca@st.com>]

Hi Lars-Peter,

I'm trying modified the driver to change the fullscale attribute and use 
the in_accel_*_scale attribute.
My question is that:

- the in_accel_*_scale attribute rappresent the conversion value from 
raw data sensor to m/s2, if I use only this value, how can I know what 
is the maximum full scale associated to the value?

- how can I view a list of available values? I have to create scale 
attribute on sysfs? If the last point is true, it is so redundant what I 
did before?


Thanks,

Denis


On 10/29/2012 11:30 AM, Lars-Peter Clausen wrote:
> On 10/29/2012 11:24 AM, Denis CIOCCA wrote:
>>
>>> There is no attachment attached to this mail.
>> my was a question. You prefer I attach all source code or the last modified?
>>
>>
>>>> I don't find IIO_G_TO_M_S_2 in the framework code, but I added this
>>>> macro in my source code. It is exatly?
>>>
>>> It's in the latest IIO tree and also in staging/staging-next. The definition is
>>>
>>> +#define IIO_DEGREE_TO_RAD(deg) (((deg) * 314159ULL + 9000000ULL) \
>>> 	/ 18000000ULL)
>>
>> Sorry but I'm lost. The relation from IIO_DEGREE_TO_RAD and IIO_G_TO_M_S_2?
>>
>
> Sorry, too early in the morning, copied the wrong line.
>
> +#define IIO_G_TO_M_S_2(g) ((g) * 980665ULL / 100000ULL)
>
> Btw. the full patch can be found here:
>   http://comments.gmane.org/gmane.linux.kernel.iio/5777
>
> - Lars
>