MTK_BANK_WIDTH
for_each_set_bit(offset, &pending, MTK_BANK_WIDTH)
if (rg->bank != gpio / MTK_BANK_WIDTH)
return gpio % MTK_BANK_WIDTH;
rg->chip.gc.ngpio = MTK_BANK_WIDTH;
rg->chip.gc.offset = bank * MTK_BANK_WIDTH;
mtk->num_gpios = MTK_BANK_WIDTH * MTK_BANK_CNT;