rk_rng_writel
rk_rng_writel(rk_rng, RKRNG_CTRL_REQ_TRNG | (RKRNG_CTRL_REQ_TRNG << 16),
rk_rng_writel(rk_rng, RKRNG_STATE_TRNG_RDY, RKRNG_STATE);
rk_rng_writel(rk_rng, istat, TRNG_V1_ISTAT);
rk_rng_writel(rk_rng, RK_TRNG_V1_AUTO_RESEED_CNT / 16, TRNG_V1_AUTO_RQSTS);
rk_rng_writel(rk_rng, reg, TRNG_V1_ISTAT);
rk_rng_writel(rk_rng, TRNG_V1_MODE_256_BIT, TRNG_V1_MODE);
rk_rng_writel(rk_rng, TRNG_V1_CTRL_RAND, TRNG_V1_CTRL);
rk_rng_writel(rk_rng, reg, TRNG_V1_ISTAT);
rk_rng_writel(rk_rng, TRNG_V1_CTRL_NOP, TRNG_V1_CTRL);