MTK_UART_APDMA_NR_VCHANS 521 drivers/dma/mediatek/mtk-uart-apdma.c mtkd->dma_requests = MTK_UART_APDMA_NR_VCHANS; MTK_UART_APDMA_NR_VCHANS 525 drivers/dma/mediatek/mtk-uart-apdma.c MTK_UART_APDMA_NR_VCHANS);