[PATCH 1/2] touchscreen: sun4i-ts: A10 (sun4i) has double the temperature precision

Hans de Goede hdegoede at redhat.com
Tue Jun 17 10:15:39 PDT 2014


On 06/16/2014 11:30 PM, Dmitry Torokhov wrote:
> Hi Hans,
> On Mon, Jun 16, 2014 at 08:24:28PM +0200, Hans de Goede wrote:
>> Testing has revealed that the temperature in the rtp controller of the A10
>> (sun4i) SoC has a resolution of 50 milli degrees / step, where as the
>> A13 (sun5i) and later models have 100 milli degrees / step.
>> Add a new sun5i-a13-ts compatible to differentiate the newer models and
>> set the resolution based on the compatible string.
>> This fixes the temperature reported on the A10 being twice as high as expected.
> Should we maybe add explicit temperature steps property so that we won;t
> need to patch again if they decided to change resolution again?

Self NAK, further testing has revealed that it is likely not the resolution which is
different on the A10, but that we need to apply a different offset.



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