[PATCH V2 11/11] arm64: wait for transmit completion before next character transmission
panand at redhat.com
Thu Oct 29 03:35:04 PDT 2015
On 20/10/2015:10:04:54 AM, Geoff Levand wrote:
> On Tue, 2015-10-20 at 08:11 +0530, Pratyush Anand wrote:
> > On 19/10/2015:03:29:55 PM, Geoff Levand wrote:
> > I tested this on the foundation model and it hangs.
> > Thanks for testing it.
> > Which uart model has been used in foundation model?
> I only tested it, but did not look into it. The
> documentation should be on the ARM developer's site.
Line status register offset for pl011(which is in foundation model) and 8250
based uart are not same. I think, in that case we should keep separate argument
for lsr. Can you please try patch and let me know your feedback.
If you are using UART0 of foundation model, then you would be passing
--port=0x1C090000. With patch, you may pass one more argument
--port-lsr=0x1C090018,0x80. Even if --port-lsr is not passed to kexec() system
call, it will not hang. However, one may not see all the printed character
More information about the kexec