28 Dec, 2011

1 commit

• 759a2e30d   dma: mxs-dma: convert to clk_prepare/clk_unprepare ... Browse Code »

  The patch converts mxs-dma driver to clk_prepare/clk_unprepare by
  using helper functions clk_prepare_enable/clk_disable_unprepare.

  Signed-off-by: Shawn Guo
  Acked-by: Marek Vasut
  Acked-by: Vinod Koul

  Shawn Guo

  2011-12-28 21:29:30 +0800  

16 Aug, 2011

1 commit

• ef298c21c   mxs-dma: enable CLKGATE before accessing registers ... Browse Code »

  After calling mxs_dma_disable_chan() for a channel, that channel
  becomes unusable because some controller registers can only be written
  when the clock is enabled via CLKGATE.

  Signed-off-by: Lothar Waßmann
  Signed-off-by: Vinod Koul

  Lothar Waßmann

  2011-08-16 21:03:42 +0800  

26 Jul, 2011

2 commits

• a62bae98a   ARM: mxs-dma: reset after disable channel ... Browse Code »

  We met some channels in abnormal state after disable.
  Reset it to get a clean state.

  Signed-off-by: Dong Aisheng
  Cc: Vinod Koul
  Cc: Shawn Guo
  Signed-off-by: Vinod Koul

  Dong Aisheng

  2011-07-26 18:03:28 +0800  
• 2a9778ed8   dma: mxs-dma: fix unterminated platform_device_id table ... Browse Code »

  Signed-off-by: Axel Lin
  Signed-off-by: Vinod Koul

  Axel Lin

  2011-07-26 18:03:27 +0800  

14 Jul, 2011

1 commit

• 95bfea167   dmaengine: mxs-dma: skip request_irq for NO_IRQ ... Browse Code »

  In general, the mxs-dma users get separate irq for each channel,
  but gpmi is special one which has only one irq shared by all gpmi
  channels. It causes mxs_dma channel allocation function fail for
  all other gpmi channels except the first one calling into the
  function.

  The patch gets request_irq call skipped for NO_IRQ case, and leaves
  this gpmi specific quirk to gpmi driver to sort out. It will fix
  above problem if gpmi driver sets chan_irq as gpmi irq for only one
  channel and NO_IRQ for all the rest channels.

  Signed-off-by: Shawn Guo
  Cc: Vinod Koul
  Signed-off-by: Vinod Koul

  Shawn Guo

  2011-07-14 07:30:56 +0800  

02 Mar, 2011

1 commit

• a580b8c54   dmaengine: mxs-dma: add dma support for i.MX23/28 ... Browse Code »

  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
  Signed-off-by: Vinod Koul

  Shawn Guo

  2011-03-02 09:36:27 +0800