Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756455Ab1CRIw7 (ORCPT ); Fri, 18 Mar 2011 04:52:59 -0400 Received: from smtp.nokia.com ([147.243.128.26]:47872 "EHLO mgw-da02.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756350Ab1CRIw5 (ORCPT ); Fri, 18 Mar 2011 04:52:57 -0400 Message-ID: <4D831D4B.8090407@nokia.com> Date: Fri, 18 Mar 2011 10:52:27 +0200 From: Roger Quadros User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.14) Gecko/20110223 Thunderbird/3.1.8 MIME-Version: 1.0 To: ext Andy Green CC: , , , , , Andy Green 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> In-Reply-To: <20110312225047.27728.1835.stgit@otae.warmcat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [131.228.1.90] X-OriginalArrivalTime: 18 Mar 2011 08:52:29.0376 (UTC) FILETIME=[CFE9A400:01CBE549] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1646 Lines: 51 On 03/13/2011 12:50 AM, ext Andy Green wrote: > Introduce a generic helper function that can set a MAC address using > data from the OMAP unqiue CPU ID register. > > Signed-off-by: Andy Green > --- > > arch/arm/mach-omap2/id.c | 13 +++++++++++++ > arch/arm/mach-omap2/include/mach/id.h | 1 + > 2 files changed, 14 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c > index 5f9086c..fc69ec5 100644 > --- a/arch/arm/mach-omap2/id.c > +++ b/arch/arm/mach-omap2/id.c > @@ -506,3 +506,16 @@ void __init omap2_set_globals_tap(struct omap_globals *omap2_globals) > else > tap_prod_id = 0x0208; > } > + > + > +void omap2_die_id_to_mac(u8 *mac, int length) > +{ > + struct omap_die_id odi; > + > + omap_get_die_id(&odi); > + memcpy(mac, &odi.id_0, length); > + > + /* mark it as not multicast and outside official 80211 MAC namespace */ > + > + mac[0] = (mac[0] & ~1) | 2; > +} > diff --git a/arch/arm/mach-omap2/include/mach/id.h b/arch/arm/mach-omap2/include/mach/id.h > index 02ed3aa..72e10eb 100644 > --- a/arch/arm/mach-omap2/include/mach/id.h > +++ b/arch/arm/mach-omap2/include/mach/id.h > @@ -18,5 +18,6 @@ struct omap_die_id { > }; so here lies the answer to my question "From where do you get the MAC" :) Is there a guarantee that this MAC will work in all Ethernet setups? -- regards, -roger -- 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/