Re: MPC8260 SCC UART hardware flow control

In message [off-list ref] you wrote:

I was wondering if anyone had implemented hardware flow control support in the 
cpm_uart driver. If not, I would appreciate pointers regarding how to do so.

You can probably take our 2.4 kernel code as a starting point. But be
aware of the inherent restrictions of the CPM, see
http://www.denx.de/wiki/view/DULG/UseSCCUARTWithHardwareHandshake

[In the end, you might want to configure  the  handshake  signals  as
GPIO lines and controll these manually. But then you will have to ask
yourself why you are using a CPM...]

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
The average woman would rather have beauty than brains,  because  the
average man can see better than he can think.

On Wednesday 19 July 2006 20:37, Wolfgang Denk wrote:

In message [off-list ref] you wrote:

quoted

I was wondering if anyone had implemented hardware flow control support
in the cpm_uart driver. If not, I would appreciate pointers regarding how
to do so.

You can probably take our 2.4 kernel code as a starting point. But be
aware of the inherent restrictions of the CPM, see
http://www.denx.de/wiki/view/DULG/UseSCCUARTWithHardwareHandshake

I didn't know the CPM implemented hardware flow control as a DTE only. Thanks 
for the information. As our hardware connects to DCE devices this shouldn't 
be a problem.

[In the end, you might want to configure  the  handshake  signals  as
GPIO lines and controll these manually. But then you will have to ask
yourself why you are using a CPM...]

Laurent Pinchart