On Fri, Apr 19, 2013 at 05:14:36PM +0100, Peter Maydell wrote: > On 19 April 2013 17:12, Catalin Marinas <catalin.mari...@arm.com> wrote: > > On Fri, Apr 19, 2013 at 11:05:47AM +0100, Peter Maydell wrote: > >> Please make the kernel pick the device out of the device tree > >> blob. The whole point of device tree is that it's how to tell > >> the kernel where things live -- making kvmtool/QEMU and/or the > >> user also have to mess with the kernel command line is awkward > >> and annoying. > > > > For a normal console device, it indeed needs to get it from the DT. For > > early console, you want it earlier than DT parsing so we pass it on the > > kernel command line via the earlyprintk= parameter. > > You should fix your DT handling code so you can get at the info > when you need it rather than pushing the problem into bootloaders > and QEMU, please. DT is your data structure so feel free to > (re)design it so relevant information can be accessed early > if that's useful.
earlyprintk is used for debugging early problems, like DT parsing. You don't have to use it unless you are debugging something. Without earlyprintk you just get a normal console during boot, based on the DT description. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
