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authorHeiko Stuebner <heiko@sntech.de>2013-10-08 06:42:10 +0900
committerKukjin Kim <kgene.kim@samsung.com>2013-10-08 06:42:10 +0900
commitddeccb8d6b5bbe2c1e3a29f8c74b52f170c2207d (patch)
tree808f494a72787c87c2504f6b93c8cd165489bda2 /drivers/dma/Kconfig
parent0fa93b914d45ed8dd248bd621d4396e9f790817c (diff)
downloadop-kernel-dev-ddeccb8d6b5bbe2c1e3a29f8c74b52f170c2207d.zip
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dmaengine: add driver for Samsung s3c24xx SoCs
This adds a new driver to support the s3c24xx dma using the dmaengine and makes the old one in mach-s3c24xx obsolete in the long run. Conceptually the s3c24xx-dma feels like a distant relative of the pl08x with numerous virtual channels being mapped to a lot less physical ones. The driver therefore borrows a lot from the amba-pl08x driver in this regard. Functionality-wise the driver gains a memcpy ability in addition to the slave_sg one. The driver supports both the method for requesting the peripheral used by SoCs before the S3C2443 and the different method for S3C2443 and later. On earlier SoCs the hardware channels usable for specific peripherals is constrainted while on later SoCs all channels can be used for any peripheral. Tested on a s3c2416-based board, memcpy using the dmatest module and slave_sg partially using the spi-s3c64xx driver. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'drivers/dma/Kconfig')
-rw-r--r--drivers/dma/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 526ec77..d639115 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -154,6 +154,18 @@ config TEGRA20_APB_DMA
This DMA controller transfers data from memory to peripheral fifo
or vice versa. It does not support memory to memory data transfer.
+config S3C24XX_DMAC
+ tristate "Samsung S3C24XX DMA support"
+ depends on ARCH_S3C24XX && !S3C24XX_DMA
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ Support for the Samsung S3C24XX DMA controller driver. The
+ DMA controller is having multiple DMA channels which can be
+ configured for different peripherals like audio, UART, SPI.
+ The DMA controller can transfer data from memory to peripheral,
+ periphal to memory, periphal to periphal and memory to memory.
+
source "drivers/dma/sh/Kconfig"
config COH901318
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