MUX_PINS_PER_REG 240 drivers/pinctrl/sunxi/pinctrl-sunxi.h offset += pin % PINS_PER_BANK / MUX_PINS_PER_REG * 0x04; MUX_PINS_PER_REG 246 drivers/pinctrl/sunxi/pinctrl-sunxi.h u32 pin_num = pin % MUX_PINS_PER_REG;