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| author | Matt Porter <mporter@ti.com> | 2013-02-01 18:22:52 +0000 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-02-27 22:37:34 +0530 |
| commit | 864ef69b2d9b34e7c85baa9c5c601d5e735b208a (patch) | |
| tree | 3f6d1de5857b492ee9823237b0ee446049615923 | |
| parent | 17166a3b6e88b93189e6be5f7e1335a3cc4fa965 (diff) | |
| download | linux-864ef69b2d9b34e7c85baa9c5c601d5e735b208a.tar.gz linux-864ef69b2d9b34e7c85baa9c5c601d5e735b208a.tar.bz2 linux-864ef69b2d9b34e7c85baa9c5c601d5e735b208a.zip | |
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>
| -rw-r--r-- | include/linux/dmaengine.h | 16 |
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 --- */ |