Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756745Ab1CROsF (ORCPT ); Fri, 18 Mar 2011 10:48:05 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:60991 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750953Ab1CROr4 (ORCPT ); Fri, 18 Mar 2011 10:47:56 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=sender:message-id:date:from:reply-to:user-agent:mime-version:to:cc :subject:references:in-reply-to:content-type :content-transfer-encoding; b=dad2oZjciSh6UXjZ5jsI11qsU5uImrqQT7TwPX8uLDo/ElTiZz3IR/oUD7rP1/aT+V aZzY23wxEY257i7Xz9LFDmB3kbYFffIYuvTrHaGtQbbGtuZi6wXuivjS8tbV5dJnYTbr LOY9992d25pck5SWZQQ47RwzaAu3N3hdH+DRs= Message-ID: <4D837095.5040307@linaro.org> Date: Fri, 18 Mar 2011 14:47:49 +0000 From: Andy Green Reply-To: andy.green@linaro.org User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.15) Gecko/20110310 Fedora/3.1.9-2.fc16 Thunderbird/3.1.9 MIME-Version: 1.0 To: "Premi, Sanjeev" CC: Arnd Bergmann , "linux-kernel@vger.kernel.org" , "linux-usb@vger.kernel.org" , "linux-omap@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "patches@linaro.org" Subject: Re: [RFC PATCH 2/5] OMAP2+: add cpu id register to MAC address helper References: <20110312224440.27728.60593.stgit@otae.warmcat.com> <20110312225047.27728.1835.stgit@otae.warmcat.com> <201103180934.39997.arnd@arndb.de> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 936 Lines: 25 On 03/18/2011 02:37 PM, Somebody in the thread at some point said: Hi - > [sp] This 'trick' has been tried earlier in u-boot. See: > http://www.mail-archive.com/u-boot@lists.denx.de/msg19915.html > > I am also not sure whether DIE_ID would really be unique. It doesn't actually need all the bits to be unique for this, just have a low probability of collision with a reasonable number of devices sharing the same network. If there is not enough variation as it stands in the first 6 bytes of it, all the 128 bit ID can be xor'd together, use the other registers about die revision, hawkeye also xored in, etc. I'll ask about what can be expected from this at TI. -Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/