From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christopher Covington Subject: Re: [PATCH v2 1/3] devicetree: bindings: Document qcom,msm-id and qcom,board-id Date: Fri, 06 Mar 2015 10:09:36 -0500 Message-ID: <54F9C330.5090208@codeaurora.org> References: <1425503602-24916-1-git-send-email-galak@codeaurora.org> <7h8ufbjkod.fsf@deeprootsystems.com> <07D4E4D1-BF8C-4583-9505-9F321DB10406@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Rob Clark , Olof Johansson Cc: Kumar Gala , Kevin Hilman , linux-arm-msm , "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" , "linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "arm-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org" , "devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , =?UTF-8?Q?Heiko_St=c3=bcbner?= List-Id: devicetree@vger.kernel.org On 03/05/2015 09:28 PM, Rob Clark wrote: > On Thu, Mar 5, 2015 at 8:59 PM, Olof Johansson wrote: >> On Thu, Mar 5, 2015 at 12:23 PM, Kumar Gala wrote: >>> >>> On Mar 5, 2015, at 1:42 PM, Kevin Hilman wrote: >>> >>>> Kumar Gala writes: >>>> >>>>> The top level qcom,msm-id and qcom,board-id are utilized by bootloaders >>>>> on Qualcomm MSM platforms to determine which device tree should be >>>>> utilized and passed to the kernel. >>>>> >>>>> Cc: >>>>> Signed-off-by: Kumar Gala >>>> >>>> Is this the special magic that allows qcom bootloaders to take a kernel >>>> plus multiple DTBs and figure out which DTB to pass? >>>> >>>> Kevin >>> >>> yes >> >> That's a bummer. >> >> Luckily, the solution for upstream is still quite simple: Provide only >> one devicetree, and it'll be used, right? >> > > I never managed to figure out how to get that to work (at least on my > apq8074 dragonboard.. fortunately ifc6540 seems to work w/ appended > dtb).. kind of a pita because it is a bit of a non-standard boot.img > format too.. I think you're talking about the boot flow from plain poweron which I wish I knew more about, but in case it's any help, here are some fastboot boot steps what worked for me a while back. http://elinux.org/Dragonboard/APQ8074 Chris -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html