Re: [PATCH 3/3] hwrng: msm - Add support for prng v2

[Vinod]

On 18-06-18, 13:24, Stephen Boyd wrote:
> Quoting Bjorn Andersson (2018-06-18 11:21:23)
> > On Mon 18 Jun 07:12 PDT 2018, Vinod Koul wrote:
> > 
> > > Qcom 8996 and later chips support prng v2 where we need to only
> > > implement .read callback for hwrng.
> > > 
> > 
> > The hardware still needs initialization, so I think you should expand
> > this to mention that the initialization is moved to secure world and
> > that's the reason why we only implement read.
> > 
> > The question is what happens in projects with other security models.
> 
> Can we still read the PRNG_CONFIG register to see if it's already been
> configured or not and then bail out if it isn't configured? That would
> be better as long as we the system doesn't blow up if non-secure mode
> tries to read the config register.

Unfortunately it did blow up for me when I tried it..

-- 
~Vinod