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
