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authorMatt Porter <mporter@ti.com>2013-02-01 18:22:52 +0000
committerVinod Koul <vinod.koul@intel.com>2013-02-27 22:37:34 +0530
commit864ef69b2d9b34e7c85baa9c5c601d5e735b208a (patch)
tree3f6d1de5857b492ee9823237b0ee446049615923 /include
parent17166a3b6e88b93189e6be5f7e1335a3cc4fa965 (diff)
dmaengine: add dma_request_slave_channel_compat()
Adds a dma_request_slave_channel_compat() wrapper which accepts both the arguments from dma_request_channel() and dma_request_slave_channel(). Based on whether the driver is instantiated via DT, the appropriate channel request call will be made. This allows for a much cleaner migration of drivers to the dmaengine DT API as platforms continue to be mixed between those that boot using DT and those that do not. Suggested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Matt Porter <mporter@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dmaengine.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index f5939999cb65..91ac8da25020 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1001,6 +1001,22 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type);
struct dma_chan *net_dma_find_channel(void);
#define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
+#define dma_request_slave_channel_compat(mask, x, y, dev, name) \
+ __dma_request_slave_channel_compat(&(mask), x, y, dev, name)
+
+static inline struct dma_chan
+*__dma_request_slave_channel_compat(dma_cap_mask_t *mask, dma_filter_fn fn,
+ void *fn_param, struct device *dev,
+ char *name)
+{
+ struct dma_chan *chan;
+
+ chan = dma_request_slave_channel(dev, name);
+ if (chan)
+ return chan;
+
+ return __dma_request_channel(mask, fn, fn_param);
+}
/* --- Helper iov-locking functions --- */