On Fri, Mar 22, 2013 at 12:29 AM, Rajeshwari Shinde <rajeshwar...@samsung.com> wrote: > A SPI slave may take time to react to a request. For SPI flash devices > this time is defined as one bit time, or a whole byte for 'fast read' > mode. > > If the SPI slave is another CPU, then the time it takes to react may > vary. It is convenient to allow the slave device to tag the start of > the actual reply so that the host can determine when this 'preamble' > finishes and the actual message starts. > > Add a preamble flag to the available SPI flags. If supported by the > driver then it will ignore any received bytes before the preamble > on each transaction. This ensures that reliable communication with > the slave is possible. > > Signed-off-by: Simon Glass <s...@chromium.org> > Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
Acked-by: Simon Glass <s...@chromium.org> _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
