Re: [PATCH v2 17/17] soc/tegra: remove lagacy powergate APIs

[Peter De Schrijver]

On Thu, Mar 12, 2015 at 01:45:02PM +0100, Thierry Reding wrote:
> * PGP Signed by an unknown key
> 
> On Thu, Mar 12, 2015 at 08:15:18PM +0800, Vince Hsu wrote:
> > We switch to generic power domain now. So remove the legacy functions.
> > 
> > Signed-off-by: Vince Hsu <vinceh@xxxxxxxxxx>
> > ---
> >  drivers/soc/tegra/pmc.c | 68 -------------------------------------------------
> >  include/soc/tegra/pmc.h | 22 ----------------
> >  2 files changed, 90 deletions(-)
> 
> I don't think we can do this. What if somebody updates their kernel but
> not the DTB? In that case they'll end up with drivers that don't enable
> power partitions but at the same time the powergate driver won't enable
> them either because it is missing the corresponding nodes in the DTB.
> 
> What we'll have to do is probably keep the code that enables the power
> partitions and make it conditional on the power domains somehow. Is
> there a way to determine at runtime whether a device has been attached
> to a power domain?

Or use DT overlays to 'load' a hardcoded overlay for the specific SoC?

Cheers,

Peter.
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