PS2_REG_GCTL
writel(rval, drvdata->reg_base + PS2_REG_GCTL);
rval = readl(drvdata->reg_base + PS2_REG_GCTL);
writel(rval & ~(PS2_GCTL_INTEN), drvdata->reg_base + PS2_REG_GCTL);
writel(0, drvdata->reg_base + PS2_REG_GCTL);