Re: [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

On Thu, 11 Dec 2008 19:39:21 +0100
Matteo Fortini [off-list ref] 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 <redacted>
---
 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