REG_INTR_POLARITY
sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, !TEST_STATE(hwirq, _IS_LOW));
sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, is_low);
sp_intc_assign_bit(hwirq, REG_INTR_POLARITY, TEST_STATE(hwirq, _IS_LOW));
#define REG_INTR_PRIORITY (REG_INTR_POLARITY + SP_INTC_REG_SIZE)
writel_relaxed(0, REG_INTR_POLARITY + i * 4);