[PATCH v6 00/16] spi/spi-atmel: add dmaengine support for atmel spi controller and to test the device tree support

[Wenyou Yang]

Hi All, 

This set of patches is to add dmaengine support for atmel spi and to test device tree support.

The work is based on Nicolas and Richard's work.

Because the dma engine device tree support isn't available now, to at91sam9x5ek and at91sam9n12ek
with dma support, it doesn't work on the dmaengine mode, only on PIO mode so far.

It has been tested as below:
 1./tested on v3.9-rc1, by using mtd utils, "mount", "umount" and "cp" commands.
 2./tested on "spi/next" git tree after changing master->num_chipselect which fixed in v3.9-rc1.
 3./tested by using Documentation/spi/spidev_test.c on "/dev/spidev".
 4./tested on on at91sam9x5ek, at91sam9m10g45ek, at91sam9263ek and at91sam9g20ek boards.

It is based on v3.9-rc1

Changelog:
v6:
     1./ remove: fix master->num_chipselect wrongly set patch which isn't a issue in v3.9-rc1.
     2./ fix probing failure after xfer->speed_hz set.

v5:
     1./ add pinctrl patches.
     2./ detect capabilities by reading spi version register to replace multiple compatiles.
     3./ change the "cs-gpios" property of spi node.
     4./ rebase on v3.8.

v4:
     1./ Take Joe Perches's adivce, rewrite atmel_spi_is_v2(struct atmel_spi *as) 
         and atmel_spi_use_dma(struct atmel_spi *as),
	 and remove atmel_spi_use_pdc(struct atmel_spi *as).
     2./ Rebase on v3.8-rc3.

V3:
     1./ Rebase on v3.8-rc2.
     2./ Remove some Jean-Christophe's patches which has been applied on v3.8-rc2.
     3./ Remove spi property "cs-gpios" from the SoC dtsi files to the board dts files
         to avoid some useless pin conflicts.

v2: 
     1./ Remove the patch :PATCH]mtd: m25p80: change the m25p80_read to reading page to page
	 which purpose to fix the BUG: when run "flashcp /bin/busybox /dev/mtdX" in the at91sam9g25ek
	 with DMA mode, it arises a OOPS. Now fix it in this patch:
	    [PATHC] spi/atmel_spi: add dmaengine support changing to fix the [BUG].
     2./ Remove two patches:
   	    which purpose to read dts property to select SPI IP version and DMA mode
	    Now they will be gat from device tree different compatile.
     3./ Fix DMA: when enable both spi0 AND spi1, the spi0 doesn't work BUG.
     4./ Rebase v3.7-rc8.

Best Regards,
Wenyou Yang.

Nicolas Ferre (5):
  spi/spi-atmel: add physical base address
  spi/spi-atmel: call unmapping on transfers buffers
  spi/spi-atmel: status information passed through controller data
  spi/spi-atmel: add flag to controller data for lock operations
  spi/spi-atmel: add dmaengine support

Richard Genoud (6):
  spi/spi-atmel: fix spi-atmel driver to adapt to slave_config changes
  spi/spi-atmel: correct 16 bits transfers using PIO
  spi/spi-atmel: correct 16 bits transfers with DMA
  ARM: at91: add clocks for spi dt entries
  ARM: dts: add spi nodes for atmel SoC
  ARM: dts: add spi nodes for the atmel boards

Wenyou Yang (5):
  spi/spi-atmel: fix probing failure after xfer->speed_hz set
  spi/spi-atmel: detect the capabilities of SPI core by reading the
    VERSION register.
  spi/spi-atmel: add support transfer on CS1,2,3, not only on CS0
  spi/spi-atmel: add pinctrl support for atmel spi
  ARM: dts: add pinctrl property for spi node for atmel SoC

 arch/arm/boot/dts/at91sam9260.dtsi          |   40 ++
 arch/arm/boot/dts/at91sam9263.dtsi          |   40 ++
 arch/arm/boot/dts/at91sam9263ek.dts         |   10 +
 arch/arm/boot/dts/at91sam9g20ek_common.dtsi |   10 +
 arch/arm/boot/dts/at91sam9g45.dtsi          |   40 ++
 arch/arm/boot/dts/at91sam9m10g45ek.dts      |   10 +
 arch/arm/boot/dts/at91sam9n12.dtsi          |   40 ++
 arch/arm/boot/dts/at91sam9n12ek.dts         |   10 +
 arch/arm/boot/dts/at91sam9x5.dtsi           |   40 ++
 arch/arm/boot/dts/at91sam9x5ek.dtsi         |   10 +
 arch/arm/mach-at91/at91sam9260.c            |    2 +
 arch/arm/mach-at91/at91sam9g45.c            |    2 +
 arch/arm/mach-at91/at91sam9n12.c            |    2 +
 arch/arm/mach-at91/at91sam9x5.c             |    2 +
 drivers/spi/spi-atmel.c                     |  766 ++++++++++++++++++++++++---
 15 files changed, 955 insertions(+), 69 deletions(-)

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1.7.9.5