[v1,00/15] add ecspi ERR009165 for i.mx6/7 soc family

Message

Robin Gong April 23, 2019, 1:50 p.m. UTC

There is ecspi ERR009165 on i.mx6/7 soc family, which cause FIFO
transfer to be send twice in DMA mode. Please get more information from:
https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf. The workaround is adding
new sdma ram script which works in XCH  mode as PIO inside sdma instead
of SMC mode, meanwhile, 'TX_THRESHOLD' should be 0.
  The issue should be exist on all legacy i.mx6/7 soc family before i.mx6ul,
NXP fix this design issue from i.mx6ul, so newer chips such as i.mx6ull/
i.mx8mq/i.mx8mm, don't need this workaroud anymore. This patch set
add new 'fsl,imx6ul-ecspi' for ecspi driver and 'ecspi_fixed' in sdma
driver to choose if need errata or not.
  The first two reverted patches should be the same issue, though, it
seems 'fixed' by changing to other shp script. Hope Sean or Sascha could
have the chance to test this patch set if could fix their issues.
  Besides, enable sdma support for i.mx8mm/8mq and fix ecspi1 not work
on i.mx8mm because the event id is zero.

PS:
 Please get sdma firmware from below linux-firmware and copy it to your
local rootfs /lib/firmware/imx/sdma.
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/imx/sdma

Robin Gong (15):
  Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"
  Revert "ARM: dts: imx6: Use correct SDMA script for SPI cores"
  Revert "dmaengine: imx-sdma: refine to load context only once"
  dmaengine: imx-sdma: remove dupilicated sdma_load_context
  dma: engine: imx-sdma: add mcu_2_ecspi script
  spi: imx: fix ERR009165
  spi: imx: remove ERR009165 workaround on i.mx6ul
  dt-bindings: spi: imx: add i.mx6ul to state errata fixed
  dmaengine: imx-sdma: remove ERR009165 on i.mx6ul
  dt-bindings: dma: imx-sdma: add i.mx6ul/6sx compatible name
  dmaengine: imx-sdma: fix ecspi1 rx dma not work on i.mx8mm
  ARM64: dts: freescale: imx8mm/8mq: update new compatible name for
    ecspi and sdma
  ARM: dts: imx6ul: add dma support on ecspi
  ARM: dts: imx6sll: correct ecspi/sdma compatible
  arm64: defconfig: Enable SDMA on i.mx8mq/8mm

 .../devicetree/bindings/dma/fsl-imx-sdma.txt       |  2 +
 .../devicetree/bindings/spi/fsl-imx-cspi.txt       |  2 +
 arch/arm/boot/dts/imx6q.dtsi                       |  2 +-
 arch/arm/boot/dts/imx6qdl.dtsi                     |  8 +--
 arch/arm/boot/dts/imx6sll.dtsi                     | 10 ++--
 arch/arm/boot/dts/imx6ul.dtsi                      |  8 +++
 arch/arm64/boot/dts/freescale/imx8mm.dtsi          | 14 ++---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi          |  6 +-
 arch/arm64/configs/defconfig                       |  3 +
 drivers/dma/imx-sdma.c                             | 67 ++++++++++++++++------
 drivers/spi/spi-imx.c                              | 46 ++++++++++++---
 include/linux/platform_data/dma-imx-sdma.h         |  1 +
 12 files changed, 124 insertions(+), 45 deletions(-)