linux-stable.git/include/linux/spi/spi.h, branch v4.7

spi: core: add hook flash_read_supported to spi_master

2016-04-25T17:51:31+00:00

If hook spi_flash_read is implemented the fast flash read feature
is enabled for all devices attached to the respective master.

In most cases there is just one flash chip, however there are also
devices with more than one flash chip, namely some WiFi routers.
Then the fast flash read feature can be used for the first chip only.
OpenWRT implemented an own handling of this case, using controller_data
element of spi_device to hold the information whether fast flash read
can be used for a device.

This patch adds hook flash_read_supported to spi_master which is
used to extend spi_flash_read_supported() by checking whether the
fast flash read feature can be used for a specific spi_device.

If the hook is not implemented the default behavior is to allow
fast flash read for all devices (if spi_flash_read is implemented).

Signed-off-by: Heiner Kallweit 
Signed-off-by: Mark Brown

Merge remote-tracking branches 'spi/topic/res', 'spi/topic/rockchip', 'spi/topic/sh', 'spi/topic/ti-qspi' and 'spi/topic/xilinx' into spi-next

2016-03-11T07:28:53+00:00

Merge remote-tracking branches 'spi/topic/lp8841', 'spi/topic/msg', 'spi/topic/pl022' and 'spi/topic/pxa2xx' into spi-next

2016-03-11T07:28:43+00:00

Merge remote-tracking branches 'spi/topic/doc', 'spi/topic/dw' and 'spi/topic/flash' into spi-next

2016-03-11T07:28:35+00:00

Merge remote-tracking branches 'spi/topic/acpi', 'spi/topic/axi-engine', 'spi/topic/bcm2835' and 'spi/topic/bcm2835aux' into spi-next

2016-03-11T07:28:25+00:00

spi: Fix htmldocs build error due struct spi_replaced_transfers

2016-03-11T07:23:01+00:00

The kernel-doc has to be just before the structure definition but the one
for struct spi_replaced_transfers was before a structure declaration and
that confuses kernel-doc which complains with the following build error:

.//include/linux/spi/spi.h:933: error: Cannot parse struct or union!

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Mark Brown

spi: docbook: fix parsing error

2016-02-18T16:59:53+00:00

Fixes docbook parsing error because documentation
is not directly followed by the structure, but typedef
used in structure.

Reordering should solve that issue.

Signed-off-by: Martin Sperl 
Signed-off-by: Mark Brown

spi: introduce accelerated read support for spi flash devices

2016-02-09T19:34:02+00:00

In addition to providing direct access to SPI bus, some spi controller
hardwares (like ti-qspi) provide special port (like memory mapped port)
that are optimized to improve SPI flash read performance.
This means the controller can automatically send the SPI signals
required to read data from the SPI flash device.
For this, SPI controller needs to know flash specific information like
read command to use, dummy bytes and address width.

Introduce spi_flash_read() interface to support accelerated read
over SPI flash devices. SPI master drivers can implement this callback to
support interfaces such as memory mapped read etc. m25p80 flash driver
and other flash drivers can call this make use of such interfaces. The
interface should only be used with SPI flashes and cannot be used with
other SPI devices.

Signed-off-by: Vignesh R 
Signed-off-by: Mark Brown

spi: core: add spi_split_transfers_maxsize

2016-02-09T19:32:07+00:00

Add spi_split_transfers_maxsize method that splits
spi_transfers transparently into multiple transfers
that are below the given max-size.

This makes use of the spi_res framework via
spi_replace_transfers to allocate/free the extra
transfers as well as reverting back the changes applied
while processing the spi_message.

Signed-off-by: Martin Sperl 
Signed-off-by: Mark Brown

spi: core: add spi_replace_transfers method

2016-02-09T19:32:07+00:00

Add the spi_replace_transfers method that can get used
to replace some spi_transfers from a spi_message with other
transfers.

Signed-off-by: Martin Sperl 
Signed-off-by: Mark Brown