linux-stable.git/drivers/spi, branch v4.12.7 Linux kernel stable tree spi: atmel: fix corrupted data issue on SAM9 family SoCs 2017-07-27T22:10:06+00:00 Cyrille Pitchen cyrille.pitchen@microchip.com 2017-06-23T15:39:16+00:00 2e74a4f521f9f8df7d3ab4be0806dab25084c20d commit 7094576ccdc3acfe1e06a1e2ab547add375baf7f upstream. This patch disables the use of the DMA for data transfer and forces the use of PIO transfers instead as a quick fixup to solve the cache aliasing issue on ARM9 based cores, which embeds a VIVT data cache. Indeed in the case of VIVT data caches, it is not safe to call dma_map_*() functions to map buffers for DMA transfers when those buffers have been allocated by vmalloc() or from any DMA-unsafe area. Further patches may propose a better solution based on the use of a bounce buffer at the SPI sub-system level but such solution needs more time to be discussed. Then the use of DMA transfers could be enabled again to improve the performances but before that, this patch already solves the issue. Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 7094576ccdc3acfe1e06a1e2ab547add375baf7f upstream.

This patch disables the use of the DMA for data transfer and forces the
use of PIO transfers instead as a quick fixup to solve the cache aliasing
issue on ARM9 based cores, which embeds a VIVT data cache.

Indeed in the case of VIVT data caches, it is not safe to call dma_map_*()
functions to map buffers for DMA transfers when those buffers have been
allocated by vmalloc() or from any DMA-unsafe area.

Further patches may propose a better solution based on the use of a bounce
buffer at the SPI sub-system level but such solution needs more time to be
discussed. Then the use of DMA transfers could be enabled again to improve
the performances but before that, this patch already solves the issue.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into spi-next 2017-04-26T14:58:22+00:00 Mark Brown broonie@kernel.org 2017-04-26T14:58:22+00:00 282ec0ea65dab88fda51b5b9b649958ae42f4ac0 






Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/spidev-test', 'spi/topic/sunxi', 'spi/topic/tegra' and 'spi/topic/test' into spi-next
2017-04-26T14:58:16+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:58:16+00:00

d8f520727f769164fa6ff0ad4a4d965336966999












Merge remote-tracking branches 'spi/topic/loopback', 'spi/topic/omap2-mcspi', 'spi/topic/orion', 'spi/topic/pl022' and 'spi/topic/sc18is602' into spi-next
2017-04-26T14:58:10+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:58:10+00:00

fbdd1b2affbd56f51aaa2a32073410133ca247f2












Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next
2017-04-26T14:58:04+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:58:04+00:00

a2d5eda07224680cb711677eff014ea15d809aae












Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/bcm63xx', 'spi/topic/cadence' and 'spi/topic/davinci' into spi-next
2017-04-26T14:57:59+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:57:59+00:00

2536374352ab112e5ea2ef8ce0cfa0e9cfa63112












Merge remote-tracking branch 'spi/topic/core' into spi-next
2017-04-26T14:57:58+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:57:58+00:00

42b1eadf4ead6e7d68f47cd985daa244823c96d3












Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/lantiq' and 'spi/fix/pl022' into spi-linus
2017-04-26T14:57:52+00:00

Mark Brown
broonie@kernel.org

2017-04-26T14:57:52+00:00

fbf3d36cb4c960b27b9c2e391d24127c5ec17a3a












spi: cadence: Allow for GPIO pins to be used as chipselects
2017-04-26T14:23:45+00:00

Moritz Fischer
mdf@kernel.org

2017-04-25T18:30:14+00:00

b42a33bd93fe0b2438511b1c7c00cfd47e17841b

This adds support for using GPIOs for chipselects as described by the
default dt-bindings.

Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>





This adds support for using GPIOs for chipselects as described by the
default dt-bindings.

Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>







spi-imx: Implements handling of the SPI_READY mode flag.
2017-04-25T15:37:53+00:00

Leif Middelschulte
leif.middelschulte@gmail.com

2017-04-23T19:19:58+00:00

f72efa7e690ab5c4068ccba31c4da032bc45c29c

This patch implements consideration of the SPI_READY mode flag as
defined in spi.h. It extends the device tree bindings to support
the values defined by the reference manual for the DRCTL field.

Thus supporting edge-triggered and level-triggered bursts.

Signed-off-by: Leif Middelschulte <Leif.Middelschulte@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>





This patch implements consideration of the SPI_READY mode flag as
defined in spi.h. It extends the device tree bindings to support
the values defined by the reference manual for the DRCTL field.

Thus supporting edge-triggered and level-triggered bursts.

Signed-off-by: Leif Middelschulte <Leif.Middelschulte@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>