linux-stable.git/drivers/spi, branch v4.16.2

Merge remote-tracking branch 'spi/topic/xilinx' into spi-next

2018-01-26T17:57:34+00:00

Merge remote-tracking branches 'spi/topic/pxa2xx', 'spi/topic/s3c64xx', 'spi/topic/sh-msiof', 'spi/topic/sirf' and 'spi/topic/sun6i' into spi-next

2018-01-26T17:57:31+00:00

Merge remote-tracking branches 'spi/topic/fsl-dspi', 'spi/topic/imx', 'spi/topic/jcore', 'spi/topic/meson' and 'spi/topic/orion' into spi-next

2018-01-26T17:57:27+00:00

Merge remote-tracking branches 'spi/topic/a3700', 'spi/topic/atmel', 'spi/topic/bcm53xx', 'spi/topic/davinci' and 'spi/topic/dw' into spi-next

2018-01-26T17:57:24+00:00

Merge remote-tracking branches 'spi/fix/imx' and 'spi/fix/sh-msiof' into spi-linus

2018-01-26T17:57:21+00:00

spi: dw: Remove unused members from struct chip_data

2018-01-26T14:50:43+00:00

Local struct chip_data has two members that are not used:

- cs. Looks like was never used
- enable_dma. Became unused by the commit f89a6d8f43eb ("spi: dw-mid: move
  to use core SPI DMA mappings").

Signed-off-by: Jarkko Nikula 
Acked-by: Andy Shevchenko 
Signed-off-by: Mark Brown

spi: orion: Fix a resource leak if the optional "axi" clk is deferred

2018-01-26T11:43:39+00:00

If the optional "axi" clk is deferred, we still need to undo some
initialisation. Especially 'master' must be released. It will be
reallocated the next time 'orion_spi_probe()' is called.

Add a new label to clean what needs to be cleaned and rename another
label to improve the names used.

Fixes: 92ae112e477a ("spi: orion: Fix clock resource by adding an optional bus clock")
Signed-off-by: Christophe JAILLET 
Acked-by: Gregory CLEMENT 
Signed-off-by: Mark Brown

spi: a3700: Remove endianness swapping for full-duplex transfers

2018-01-24T15:03:31+00:00

Fixes the following sparse warnings :
line 767: warning: incorrect type in assignment (different base types)
line 767:    expected unsigned int [unsigned] [assigned] [usertype] val_out
line 767:    got restricted __le32 [usertype] 
line 776: warning: cast to restricted __le32

This takes advantage of readl/writel to do the endianness reordering,
and removes an extra variable in the function.

Fixes: f68a7dcb91b7 ("spi: a3700: Add full-duplex support")
Signed-off-by: Maxime Chevallier 
Reviewed-by: Gregory CLEMENT 
Signed-off-by: Mark Brown

spi: a3700: Remove endianness swapping functions when accessing FIFOs

2018-01-24T15:03:13+00:00

Fixes the following sparse warnings :
line 504: warning: incorrect type in assignment (different base types)
line 504:    expected unsigned int [unsigned] [usertype] val
line 504:    got restricted __le32 [usertype] 
line 527: warning: cast to restricted __le32

This is solved by removing endian-converson functions, since the
converted values are going through readl/writel anyway, which take care
of the conversion.

Fixes: 6fd6fd68c9e2 ("spi: armada-3700: Fix padding when sending not 4-byte aligned data")
Signed-off-by: Maxime Chevallier 
Reviewed-by: Gregory CLEMENT 
Signed-off-by: Mark Brown

spi: a3700: Add full-duplex support

2018-01-18T11:10:45+00:00

The armada 3700 SPI controller has support for full-duplex transfers,
but it can only be done without using the hardware FIFOs.

A full duplex transfer is done by shifting 4 bytes at a time, or even
one byte at a time for transfers less than 4 bytes long.

While this method is perfectly suitable for small transfers, it is still
slower than using the FIFOs.

This commit implement full-duplex support, making sure that half-duplex
transfers are still done using the FIFOs with the existing method.

Some setup functions were moved around to make sure the controller is
properly configured before beginning each transfer.

This was tested on EspressoBin with a logical analyser, and a simple
setup where MISO is connected on MOSI. Transfers were made from
userspace using spidev and spi-pipe from the spi-tools project

Signed-off-by: Maxime Chevallier 
Signed-off-by: Mark Brown