SUNXI_CAN_INT_REG
sunxi_can_write(sc, SUNXI_CAN_INT_REG,
sunxi_can_read(sc, SUNXI_CAN_INT_REG));
while ((irq = sunxi_can_read(sc, SUNXI_CAN_INT_REG)) != 0) {
sunxi_can_write(sc, SUNXI_CAN_INT_REG, irq);
sunxi_can_write(sc, SUNXI_CAN_INT_REG,
sunxi_can_read(sc, SUNXI_CAN_INT_REG));
sunxi_can_read(sc, SUNXI_CAN_INT_REG),