staging: mt7621-dma: ralink: add rt2880 dma engine

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/Kconfig

@@ -124,4 +124,6 @@ source "drivers/staging/mt7621-gpio/Kconfig"
 
 source "drivers/staging/mt7621-spi/Kconfig"
 
+source "drivers/staging/mt7621-dma/Kconfig"
+
 endif # STAGING

drivers/staging/Makefile

@@ -53,3 +53,4 @@ obj-$(CONFIG_SOC_MT7621)	+= mt7621-pci/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pinctrl/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-gpio/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-spi/
+obj-$(CONFIG_SOC_MT7621)	+= mt7621-dma/

drivers/staging/mt7621-dma/Kconfig

+config DMA_RALINK
+	tristate "RALINK DMA support"
+	depends on RALINK && !SOC_RT288X
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+
+config MTK_HSDMA
+	tristate "MTK HSDMA support"
+	depends on RALINK && SOC_MT7621
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+

drivers/staging/mt7621-dma/Makefile

+obj-$(CONFIG_DMA_RALINK) += ralink-gdma.o
+obj-$(CONFIG_MTK_HSDMA) += mtk-hsdma.o
+
+ccflags-y += -I$(srctree)/drivers/dma

drivers/staging/mt7621-dma/TODO

+
+- general code review and clean up
+- ensure device-tree requirements are documented
+
+Cc: NeilBrown <neil@brown.name>