iio: Add a DMAengine framework based buffer

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Add a generic fully device independent DMA buffer implementation that uses
the DMAegnine framework to perform the DMA transfers. This can be used by
converter drivers that whish to provide a DMA buffer for converters that
are connected to a DMA core that implements the DMAengine API.

Apart from allocating the buffer using iio_dmaengine_buffer_alloc() and
freeing it using iio_dmaengine_buffer_free() no additional converter driver
specific code is required when using this DMA buffer implementation.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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Lars-Peter Clausen 2015-10-13 18:10:29 +02:00 • committed by Jonathan Cameron

parent 670b19ae9b

commit 2d6ca60f32

4 changed files with 243 additions and 0 deletions

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11

drivers/iio/buffer/Kconfig

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1

drivers/iio/buffer/Makefile

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213

drivers/iio/buffer/industrialio-buffer-dmaengine.c

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18

include/linux/iio/buffer-dmaengine.h

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