[PATCH] ARM: dts: imx: add tempmon node for imx6q thermal support

[sbabic@denx.de (Stefano Babic)]

Hi Shawn,

On 10/07/2013 09:09, Shawn Guo wrote:

> Address 0x20C8180 is where TEMPMON control registers are - they are
> embedded in ANATOP block, while calibration data is stored in OCOTP fuse
> block.
> 

Thanks, it is clear now.

>> imx_thermal tempmon.7: invalid sensor calibration data
>> imx_thermal tempmon.7: failed to get sensor data
>> imx_thermal: probe of tempmon.7 failed with error -22
> 
> What's your chip revision?  Early revisions may not have the calibration
> data.  TO1.2 should have, I think.

That is the point - on the board I tested there is a T01.0 running.

> 
>> The driver is loaded successfully if I changed the tempdata to point to
>> 020C8180. Not sure if I get the right values from temp1_crit and
>> temp1_input, but no error at the initialisation. Am I missing something ?
> 
> It reads some data but that's not calibration data, so it should not work.
> 
> Also, you need a cpu_cooling fix [1], if you want to play the thermal
> patches on imx6q.

Understood, thanks.

Stefano

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