INTC_REV_POLARITY
mst_clear_irq(data, INTC_REV_POLARITY);
void __iomem *addr = cd->base + INTC_REV_POLARITY;
void __iomem *addr = cd->base + INTC_REV_POLARITY;
mst_set_irq(data, INTC_REV_POLARITY);