[RESEND] [PATCH] ADS5121 Fix: put dummy byte to enable fixing EOF bug to first place in order not to break some drivers\nUse ALARM interrupt to avoid waiting for data to come in

[Josh Boyer]

On Thu, 11 Dec 2008 19:39:21 +0100
Matteo Fortini <m.fortini at selcomgroup.com> wrote:

> 
> This patch is to avoid breaking some drivers, in my case the ADS7846 
> touchscreen one, which use 1 char messages.
> If you put the dummy byte after the 1 char message, you get part of the 
> answer to the message in the rxbuf of the message, which is thrown away.
> 
> The solution is to put the dummy byte before the message, so that the 
> slave doesn't respond.
> 
> It also optimizes the interrupt handling, by using the alarm function of 
> the FIFO, to wait until the rx FIFO has received enough bytes, instead 
> of waiting until the tx FIFO is empty.
> 
> 
> 
> Signed-off-by: Matteo Fortini <m.fortini at selcomgroup.com>
> ---
>  drivers/spi/mpc512x_psc_spi.c |   50 
> +++++++++++++++++++++++-----------------
>  1 files changed, 29 insertions(+), 21 deletions(-)

This still seems to be whitespace corrupted.  Also, that file doesn't
even exist in any upstream kernel I can find.  What tree did you diff
this from?

josh