SDRAM_ERR_CAUSE_MSG_REG
cause_msg = readl(drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);
drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);
writel(~(SDRAM_ERR_CAUSE_DBE_MASK | SDRAM_ERR_CAUSE_SBE_MASK), drvdata->base + SDRAM_ERR_CAUSE_MSG_REG);