As per resources given below, after adding the bits to entropy pool, the Linux RNG estimates the amount of entropy for "credit_entropy_bits" function. It is estimating the amount of entropy of an event as a function of its timing. Initially, the estimator calculates the jiffies differences on three levels. Then, estimator takes the minimum of the differences absolute values and finally, it assigns it a value between 0 and 11.
I am using a TRNG for supplying entropy to Linux entropy pool. The output of TRNG is 160 bits i.e. the entropy of source is 160 bits. In case of TRNG, What will be value of entropy for "credit_entropy_bits" function ? Will it be 160 bits ?
I have pointed the "rng_current" to "rng-caam". I am running "rngd" with r option i.e. "rngd -r /dev/hwrng".