TRNG_REG_CFG_OFFSET
ctrl = readl(trng->base + TRNG_REG_CFG_OFFSET);
writel(ctrl, trng->base + TRNG_REG_CFG_OFFSET);
ctrl = readl(trng->base + TRNG_REG_CFG_OFFSET);
writel(ctrl, trng->base + TRNG_REG_CFG_OFFSET);