RK_V1CRYPTO_CTRL
while (RKC_READ(sc, RK_V1CRYPTO_CTRL) & RK_V1CRYPTO_CTRL_AES_START) {
while (RKC_READ(sc, RK_V1CRYPTO_CTRL) & RK_V1CRYPTO_CTRL_TRNG_START) {
RKC_WRITE(sc, RK_V1CRYPTO_CTRL, c);