MTK_NOR_DMA_ALIGN
(op->data.nbytes < MTK_NOR_DMA_ALIGN))
rdlen = (op->data.nbytes + MTK_NOR_DMA_ALIGN) & ~MTK_NOR_DMA_ALIGN_MASK;
MTK_NOR_BOUNCE_BUF_SIZE + MTK_NOR_DMA_ALIGN,
#define MTK_NOR_DMA_ALIGN_MASK (MTK_NOR_DMA_ALIGN - 1)