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drivers: entropy: mcux_trng: fix error after reset #37626

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drivers: entropy: mcux_trng: fix error after reset #37626

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10 changes: 10 additions & 0 deletions drivers/entropy/entropy_mcux_trng.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,16 @@ static int entropy_mcux_trng_get_entropy(const struct device *dev,
ARG_UNUSED(dev);

status = TRNG_GetRandomData(config->base, buffer, length);
if (unlikely(status)) {
/*
* There can be a situation after certain types of resets
* where the underlying TRNG IP reports an error. The
* TRNG_GetRandomData() function will clear the error but
* doesn't try to retrieve random data so make the request
* again.
*/
status = TRNG_GetRandomData(config->base, buffer, length);
}
__ASSERT_NO_MSG(!status);

return 0;
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