CQSPI_REG_SIZE
reg = readl(reg_base + CQSPI_REG_SIZE);
writel(reg, reg_base + CQSPI_REG_SIZE);
readl(reg_base + CQSPI_REG_SIZE); /* Flush posted write. */
reg = readl(reg_base + CQSPI_REG_SIZE);
writel(reg, reg_base + CQSPI_REG_SIZE);
readl(reg_base + CQSPI_REG_SIZE); /* Flush posted write. */