diff options
| author | Viresh Kumar <viresh.kumar@st.com> | 2012-02-01 16:12:18 +0530 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@linux.intel.com> | 2012-02-22 18:15:36 +0530 |
| commit | dcc043dc0c60046cf6b75ca04a462314cf64e2ba (patch) | |
| tree | 8d670aa8a2f3a5293fc202971d2c9006bf43156b /include/linux/dmaengine.h | |
| parent | 7414a1b8b2b99093d6a271a1220557e87dc1ae94 (diff) | |
dmaengine: Add flow controller information to dma_slave_config
Flow controller is programmable for few controllers and there are few
intelligent peripherals like, Synopsys JPEG controller, that needs to be a flow
controller of DMA transfers on dest side.
For this, currently two drivers, pl08x and dw_dmac, support flow controller to
be passed from platform to these drivers.
Perhaps, this should be a part of struct dma_slave_config. This patch adds
another field device_fc to this structure. User drivers must pass this as true
if they want to be flow controller of certain transfers.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'include/linux/dmaengine.h')
| -rw-r--r-- | include/linux/dmaengine.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h index 679b349d9b66..7e640bf27d2d 100644 --- a/include/linux/dmaengine.h +++ b/include/linux/dmaengine.h @@ -25,6 +25,7 @@ #include <linux/uio.h> #include <linux/scatterlist.h> #include <linux/bitmap.h> +#include <linux/types.h> #include <asm/page.h> /** @@ -331,6 +332,9 @@ enum dma_slave_buswidth { * may or may not be applicable on memory sources. * @dst_maxburst: same as src_maxburst but for destination target * mutatis mutandis. + * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill + * with 'true' if peripheral should be flow controller. Direction will be + * selected at Runtime. * * This struct is passed in as configuration data to a DMA engine * in order to set up a certain channel for DMA transport at runtime. @@ -357,6 +361,7 @@ struct dma_slave_config { enum dma_slave_buswidth dst_addr_width; u32 src_maxburst; u32 dst_maxburst; + bool device_fc; }; static inline const char *dma_chan_name(struct dma_chan *chan) |