tree 850dd36abe562f721e207d8ebd5b3c63fe373f26
parent 50fa0285955899c1678c5ee47fc69dc56d17b107
author Anatolij Gustschin <agust@denx.de> 1497454587 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1500305174 +0200

fpga: Add flag to indicate SPI bitstream is bit-reversed

Add a flag that is passed to the write_init() callback,
indicating that the SPI bitstream starts with LSB first.
SPI controllers usually send data with MSB first. If an
FPGA expects bitstream data as LSB first, the data must
be reversed either by the SPI controller or by the driver.

Alternatively the bitstream could be prepared as bit-reversed
to avoid the bit-swapping while sending. This flag indicates
such bit-reversed SPI bitstream. The low-level driver will
deal with the flag and perform bit-reversing if needed.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>