R592_REG_MSC_IRQ_INSERT
reg &= ~((R592_REG_MSC_IRQ_REMOVE | R592_REG_MSC_IRQ_INSERT) << 16);
reg |= (R592_REG_MSC_IRQ_INSERT << 16);
if (irq_status & (R592_REG_MSC_IRQ_INSERT | R592_REG_MSC_IRQ_REMOVE)) {
bool card_was_added = irq_status & R592_REG_MSC_IRQ_INSERT;