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| H A D | xiphera_trng.c | 825dff97001f18e147666b66635d2b2b4d1c4085 Fri Jul 29 11:27:27 UTC 2022 Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com> drivers: xiphera_trng: Allow interrupts while waiting for random
If for some reason getting new random values take a bit longer toggle
interrupt masks on/off while waiting.
This allows pending interrupts to be served faster in REE side as getting
new random might not be that important. At the same time it gives more
time for random number generation to complete and not just performing
spinning and waiting.
It was originally recommended by TRNG vendor not to cache previous partial
results in memory. TRNG itself is rather fast so there should
be always fresh bytes available for consumption. Thus to simplify the code
remove the FIFO construct.
Signed-off-by: Vesa Jääskeläinen <vesa.jaaskelainen@vaisala.com>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
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