On Mon, Nov 17, 2008 at 01:41:24PM -0600, Timur Tabi wrote:
> On Thu, Oct 23, 2008 at 9:54 PM, David Gibson
> <[EMAIL PROTECTED]> wrote:
> > This patch adds a new backend for the hvc console based on the
> > low-level udbg callbacks. This effectively implements a working
> > runtime console in terms of the simple udbg primitives. This is kind
> > of a hack - since udbg isn't something you really want to be using
> > routinely - but it's really useful during bringup.
>
> David, I have a stupid question. I already have an HVC console driver
> that works. Do I need to do anything, other than enable HVC_UDBG, to
> get my hvc console drive to use udbg?
Um.. well.. if you have both activated, I think you can select which
HVC console backend will be used by using console=/dev/hvcNN on the
commandline, where values of NN correspond to different backends, in
order depending on link order in some complex fashion.
But if you already have a working HVC console driver, I don't see why
you'd want to use HVC_UDBG - it's essentially a bringup hack.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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