[PATCH] iio: mxs-lradc: compute temperature from channel 8 and 9
Lars-Peter Clausen
lars at metafoo.de
Tue Nov 19 06:31:35 EST 2013
On 11/19/2013 11:51 AM, Peter Meerwald wrote:
>
>> The mxs LRADC is able to read an internal die temperature sensor. The
>> temperature has to be calculated from the value read on channel 8 and channel 9.
>> To be able to expose the result to hwmon, implement iio channel 8 as
>> (channel 9 - channel 8). Then, implement IIO_CHAN_INFO_SCALE and
>> IIO_CHAN_INFO_OFFSET so that it can be processed by hwmon through the in kernel
>> provider/consumer mechanism.
>
> wouldn't IIO_CHAN_INFO_PROCESSED be more suitable than IIO_CHAN_INFO_RAW?
No. PROCESSED means it has the right scale and offset. This is still a raw
value.
- Lars
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