diff options
| author | Shawn Guo <shawn.guo@freescale.com> | 2011-02-27 00:47:42 +0800 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2011-03-02 07:06:27 +0530 |
| commit | a580b8c5429a624d120cd603e1498bf676e2b4da (patch) | |
| tree | 14e4bd82f203bf9f43fa19341d85d993e5a4c569 /kernel/futex.c | |
| parent | 26d890f0d09fd58f7194aad651e86283cb9e6574 (diff) | |
dmaengine: mxs-dma: add dma support for i.MX23/28
This patch adds dma support for Freescale MXS-based SoC i.MX23/28,
including apbh-dma and apbx-dma.
* apbh-dma and apbx-dma are supported in the driver as two mxs-dma
instances.
* apbh-dma is different between mx23 and mx28, hardware version
register is used to differentiate.
* mxs-dma supports pio function besides data transfer. The driver
uses dma_data_direction DMA_NONE to identify the pio mode, and
steals sgl and sg_len to get pio words and numbers from clients.
* mxs dmaengine has some very specific features, like sense function
and the special NAND support (nand_lock, nand_wait4ready). These
are too specific to implemented in generic dmaengine driver.
* The driver refers to imx-sdma and only a single descriptor is
statically assigned to each channel.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'kernel/futex.c')
0 files changed, 0 insertions, 0 deletions