From mboxrd@z Thu Jan 1 00:00:00 1970 From: robert.jarzmik@free.fr (Robert Jarzmik) Date: Tue, 31 Mar 2015 11:11:09 +0200 Subject: ARM, earlyconsole and io mapping In-Reply-To: <5519DCDE.4010406@hurleysoftware.com> (Peter Hurley's message of "Mon, 30 Mar 2015 19:31:42 -0400") References: <87iodivgfm.fsf@free.fr> <5519DCDE.4010406@hurleysoftware.com> Message-ID: <874mp1v8eq.fsf@free.fr> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Peter Hurley writes: > Hi Robert, > > On 03/30/2015 08:05 AM, Robert Jarzmik wrote: >> Hi, >> >> I was wondering how the earlyconsole was supposed to work in order to add >> support to the pxa architecture. More specifically, I don't understand how the >> memory mapping is supposed to be available at the early parameters parsing. > Fixmap support has not been upstreamed yet, but if you're desperate, here's > the latest patch version: > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/318372.html Ah I'm not desperate, that would be nice to have tool on my automation platform. I've gone the DEBUG_LL + JTAG/__log_buf memory dump so far. And yet I remember viewing early concole patches a few monthes back, and I wondered how the authors could make them work ... And as my memory didn't serve me well, I couldn't remember your name. > If you're using /chosen/stdout-path, earlycon gets turned off at dummy > VT console load, so for right now, specify your earlycon and consoles on the > command line. Ah I'm using device-tree in only 1/3rd of the PXA tests : - 1/3rd for legacy platform_data tests - 1/3rd for device-tree pxa platforms - 1/3rd for multiplatform kernel Anyway, I hope you'll have Russell's comments addressed, and that your patch will make it upstream. Thanks for the information, it is exactly what I was asking for. Cheers. -- Robert