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authorLothar Waßmann <LW@KARO-electronics.de>2011-12-08 09:15:44 +0100
committerVinod Koul <vinod.koul@linux.intel.com>2011-12-23 20:54:55 +0530
commit7ad7a345a4f17c08a1bb9bfdbb62f7793d84aa36 (patch)
tree83839c0af2da4529d5fdec1b9c961b541d572c66 /arch
parent6d23ea4b1906f28f5d99ad6aeef7207c48be6bfd (diff)
dma: mxs-dma: Don't use CLKGATE bits in CTRL0 to disable DMA channels
This is how the original Freescale code (unintentionally) worked, because the code path which would have asserted the CLKGATE bit was never actually reached in their code. This fixes the nefarious "DMA timout" bug when multiple DMA channels (e.g. GPMI NAND and MMC) are used at the same time. If a better fix for this problem should be found, the clkgate handling could be reinstated. See http://lists.infradead.org/pipermail/linux-arm-kernel/2011-September/065228.html Also reverse the order of mxs_dma_disable_chan() and mxs_dma_reset_chan() in mxs_dma_control() because mxs_dma_reset_chan() can only work when the DMA channel is enabled. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'arch')
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