RE: [PATCH 0/5] ep93xx DMA patches
From: H Hartley Sweeten
Date: Mon May 23 2011 - 13:34:34 EST
On Sunday, May 22, 2011 10:03 AM, Mika Westerberg wrote:
> Hello all,
> Motivation of this series was to add DMA support for the ep93xx SPI driver.
> However, current platform DMA code didn't support the M2M channels which were
> required for SPI (and IDE) peripherals.
> Ryan Mallon suggested that maybe we should integrate both M2M and M2P code
> under the dmaengine API. The purpose of this series is to do just that and
> convert all the existing users to use that new API.
> Patches 1-4 add dmaengine driver and convert the existing users to dmaengine
> API. The last patch adds DMA support for the SPI driver.
> I've been testing these on TS-7260 (ep9302) connected to SPI EEPROM, and
> Sim.One (ep9307) with mmc_spi and AC'97 audio.
> memcpy() testing has been done by running drivers/dma/dmatest.ko.
> Mika Westerberg (5):
> dmaengine: add ep93xx DMA support
> ep93xx: add dmaengine platform code
> ASoC: ep93xx: convert to use the DMA engine API
> ep93xx: remove the old M2P DMA code
> spi/ep93xx: add DMA support
> Documentation/spi/ep93xx_spi | 10 +
> arch/arm/mach-ep93xx/Makefile | 2 +-
> arch/arm/mach-ep93xx/core.c | 6 +-
> arch/arm/mach-ep93xx/dma-m2p.c | 411 -------
> arch/arm/mach-ep93xx/dma.c | 108 ++
> arch/arm/mach-ep93xx/include/mach/dma.h | 190 ++---
> arch/arm/mach-ep93xx/include/mach/ep93xx_spi.h | 2 +
> drivers/dma/Kconfig | 7 +
> drivers/dma/Makefile | 1 +
> drivers/dma/ep93xx_dma.c | 1356 ++++++++++++++++++++++++
> drivers/spi/ep93xx_spi.c | 303 +++++-
> sound/soc/ep93xx/ep93xx-ac97.c | 4 +-
> sound/soc/ep93xx/ep93xx-i2s.c | 4 +-
> sound/soc/ep93xx/ep93xx-pcm.c | 137 ++--
> 14 files changed, 1929 insertions(+), 612 deletions(-)
> delete mode 100644 arch/arm/mach-ep93xx/dma-m2p.c
> create mode 100644 arch/arm/mach-ep93xx/dma.c
> create mode 100644 drivers/dma/ep93xx_dma.c
Thanks for posting this. I'll try to do some testing and feedback later this
One positive, it looks like this will result in a small reduction in the LOC
for arch/arm/mach-ep93xx. That might help in getting this merged. ;-)
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