[RFC PATCH 3/5] thermal: Add support for the thermal sensor on A23/33

[Icenowy Zheng]

29.06.2016, 20:10, "Maxime Ripard" <maxime.ripard at free-electrons.com>:
> Hi,
>
> On Tue, Jun 28, 2016 at 09:56:22PM +0800, Icenowy Zheng wrote:
>>  The reason for a dedicate driver is:
>>  1. This IP have only thermal function, so it's not suitable to use a
>>  driver at drivers/input/touchscreen/.
>
> That's not a problem, and it's being worked on [1].
>
>>  2. Control Register are quite different.
>
> That's not a problem either, there's just a bit that you don't need to
> set in the control 1 register, and that's pretty much it. It doesn't
> justify a whole new driver.
>
>>  3. This IP uses AUDIO PLL (PLL2) as its clock!
>
> It's listed as the input, but all the rest of the documentation refers
> only to 24MHz, which seems to indicate that it's only running on the
> oscillator, which would make much more sense.
>
> Thanks,
> Maxime
>
> 1: http://lists.infradead.org/pipermail/linux-arm-kernel/2016-June/439487.html
>
> --
> Maxime Ripard, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com

Oh it works properly with PLL2 set as a dummy pll.

Maybe only osc24M is required...