[PATCH V3 00/20] dmaengine/amba-pl08x updates

[Viresh Kumar]

This patchset contains patches for ARM's pl08x DMA controller driver.
Main changes introduced by this patchset are:
- Formatting fixes
- Logical Fixes
- Support for Peripheral as flow controller
- Support for sg_len to be greater than 1 for slave transfers
- Schedule tasklet for error interrupts
- remove pl08x_pre_boundary() routine
- support for runtime PM
- etc

This patchset is tested on SPEAr600 for following tests:
- memory to memory copy (using drivers/dma/dmatest, upto 16 threads per channel)
- peripheral to memory and vice versa (Peripheral: JPEG)

This was rebased on Vinod's slave-dma.git/next, over following patch:

commit 1ae105aa7416087f2920c35c3cd16831d0d09c9c
Merge: 02f8c6a 5a42fb9
Author: Vinod Koul <vinod.koul at intel.com>
Date:   Wed Jul 27 20:43:21 2011 +0530

    Merge branch 'next' into for-linus-3.0


Hope i haven't missed any review comments.

Changes Since V2:
- Fix issues in "support runtime PM" patch, and move runtime_get and put
  routines to more suitable positions.
- Reformat debug message in "Changing few prints to dev_dbg from dev_info"
- set total_len = 0, for each dsg

Changes Since V1:
- Dropped many formatting fixes which were added earlier, as they made things
  look even bad.
- Fixed tabbing issues in PATCH "Add prep_single_byte_llis() routine"
- Many comments are updated throughout the patchset.
- Fixed interrupt handler to report spurious interrupt for channels which are
  not used.
- Clk enabling/disabling done via runtime PM
- Complete mask of flow controller is not passed from platform data now,
  direction is decided at runtime.
- pl08x_free_txd() called with locks.
- Two new patches are added:
  - Rearrange inclusion of header files in ascending order
  - pass (*ptr) to sizeof() instead of (struct xyz)

Viresh Kumar (20):
  ARM: asm/pl080.h: Protect against multiple inclusion of header file
  dmaengine/amba-pl08x: Resolve formatting issues
  dmaengine/amba-pl08x: Rearrange inclusion of header files in
    ascending order
  dmaengine/amba-pl08x: pass (*ptr) to sizeof() instead of (struct xyz)
  dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd
  dmaengine/amba-pl08x: Remove redundant comment and rewrite original
  dmaengine/amba-pl08x: Changing few prints to dev_dbg from dev_info
  dmaengine/amba-pl08x: support runtime PM
  dmaengine/amba-pl08x: Simplify pl08x_ensure_on()
  dmaengine/amba-pl08x: No need to check "ch->signal < 0"
  dmaengine/amba-pl08x: Schedule tasklet in case of error interrupt
  dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary()
  dmaengine/amba-pl08x: max_bytes_per_lli is TRANSFER_SIZE * src_width
    (not MIN(width))
  dmaengine/amba-pl08x: Add prep_single_byte_llis() routine
  dmaengine/amba-pl08x: Align lli_len to max(src.width, dst.width)
  dmaengine/amba-pl08x: Choose peripheral bus as master bus
  dmaengine/amba-pl08x: Pass flow controller information with slave
    channel data
  dmaengine/amba-pl08x: Add support for sg len greater than one for
    slave transfers
  dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool
  dmaengine/amba-pl08x: Call pl08x_free_txd() instead of calling
    kfree() directly

 arch/arm/include/asm/hardware/pl080.h |    4 +
 drivers/dma/amba-pl08x.c              |  628 ++++++++++++++++-----------------
 include/linux/amba/pl08x.h            |   30 ++-
 3 files changed, 335 insertions(+), 327 deletions(-)

-- 
1.7.2.2