Re: [PATCH] Powerpc 8xx CPM_UART delay in receive

On Tue, 14 Aug 2012 16:26:28 +0200
Christophe Leroy [off-list ref] wrote:

Hello,

I'm not sure who to address this Patch to either

It fixes a delay issue with CPM UART driver on Powerpc MPC8xx.
The problem is that with the actual code, the driver waits 32 IDLE patterns before returning the received data to the upper level. It means for instance about 1 second at 300 bauds.
This fix limits to one byte the waiting period.

Take a look how the 8250 does it - I think you want to set the value
based upon the data rate. Your patch will break it for everyone doing
high seed I/O.

Alan