sunxi_bank_offset
*reg = sunxi_bank_offset(pctl, pin) + DLEVEL_REGS_OFFSET +
*reg = sunxi_bank_offset(pctl, pin) + pctl->pull_regs_offset +
*reg = sunxi_bank_offset(pctl, pin) + MUX_REGS_OFFSET +
*reg = sunxi_bank_offset(pctl, pin) + DATA_REGS_OFFSET +