dmaengine: mediatek: Add MediaTek UART APDMA support

Add 8250 UART APDMA to support MediaTek UART. If MediaTek UART is enabled by SERIAL_8250_MT6577, and we can enable this driver to offload the UART device moving bytes. Signed-off-by: Long Cheng <long.cheng@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
mariux64 · Jun 7, 2019 · 9135408 · 9135408
1 parent 2fe5575
commit 9135408
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diff --git a/drivers/dma/mediatek/Kconfig b/drivers/dma/mediatek/Kconfig
@@ -24,3 +24,14 @@ config MTK_CQDMA
 
 	  This controller provides the channels which is dedicated to
 	  memory-to-memory transfer to offload from CPU.
+
+config MTK_UART_APDMA
+	tristate "MediaTek SoCs APDMA support for UART"
+	depends on OF && SERIAL_8250_MT6577
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Support for the UART DMA engine found on MediaTek MTK SoCs.
+	  When SERIAL_8250_MT6577 is enabled, and if you want to use DMA,
+	  you can enable the config. The DMA engine can only be used
+	  with MediaTek SoCs.
diff --git a/drivers/dma/mediatek/Makefile b/drivers/dma/mediatek/Makefile
@@ -1,2 +1,3 @@
+obj-$(CONFIG_MTK_UART_APDMA) += mtk-uart-apdma.o
 obj-$(CONFIG_MTK_HSDMA) += mtk-hsdma.o
 obj-$(CONFIG_MTK_CQDMA) += mtk-cqdma.o