Andre Przywara b83c2d92be
firmware: smccc: Register smccc_trng platform device ...
At the moment we probe for the Random Number Generator SMCCC service,
and use that in the core code (arch_get_random). However the hardware
entropy can also be useful to access from userland, and be it to assess
its quality.
Register a platform device when the SMCCC TRNG service is detected, to
allow a hw_random driver to hook onto this.
The function registering the device is deliberately made in a way which
allows expansion, so other services that could be exposed via a platform
device (or some other interface), can be added here easily.
Signed-off-by: Andre Przywara <andre.przywara@arm.com >
Reviewed-by: Ard Biesheuvel <ardb@kernel.org >
Reviewed-by: Mark Brown <broonie@kernel.org >
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au >
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