3 Commits

Author	SHA1	Message	Date
Russell King	571fa74034	dmaengine: virt-dma: add support for cyclic DMA periodic callbacks ... Add support for cyclic DMA's periodic callbacks. Drivers are expected to call vchan_cyclic_callback() when a period has completed, which will schedule the tasklet to make the callback into the driver. As callbacks are made from tasklet context, it is important to realise that we don't guarantee a callback for each completed period, but for N completed periods where N may be greater than one. Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2012-07-01 14:15:23 +01:00
Russell King	fe045874aa	dmaengine: virt-dma: vchan_find_desc() ... Add a function to find a descriptor within the depths of the virtualized DMA channel support. Needed for tx_status functionality. Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2012-07-01 14:15:22 +01:00
Russell King	50437bff7f	dmaengine: split out virtual channel DMA support from sa11x0 driver ... Split the virtual slave channel DMA support from the sa11x0 driver so this code can be shared with other slave DMA engine drivers. Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2012-07-01 14:15:21 +01:00