DATA_PINS_PER_REG  255 drivers/pinctrl/sunxi/pinctrl-sunxi.h 	offset += pin % PINS_PER_BANK / DATA_PINS_PER_REG * 0x04;
DATA_PINS_PER_REG  261 drivers/pinctrl/sunxi/pinctrl-sunxi.h 	u32 pin_num = pin % DATA_PINS_PER_REG;