[Letux-kernel] [RFC PATCH 0/3] Enable 1GHz support on omap36xx

Tony Lindgren tony at atomide.com
Mon Sep 9 18:32:36 CEST 2019


Hi,

* H. Nikolaus Schaller <hns at goldelico.com> [190909 14:57]:
> Another question that came up by private mail from André was if we
> should better disable the turbo OPPs of omap34xx and 36xx by default
> (status = "disabled";) because there are concerns about overheating
> the chips and we have no thermal regulation like for omap4 & 5.
> 
> But this would mean that every board DTS would have to set it explicitly
> to "enabled".

Yes I started thinking about that too. I think there is a requirement
to do the scaling via the voltage processor for the higher modes.
And there needs to be some way to automatically change to a lower
OPP in some cases.

For normal OPPs, using the twl regulator directly should be OK.

For the higher modes, maybe we could pass the callback functions
from arch/arm/mach-omap2/voltage.c for the twl regulator so the
voltage processor hardware can handle them directly. Or add a
separate regulator driver operating the voltages like Nishanth
posted patches for earlier.

Regards,

Tony


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