Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754973AbaBDTji (ORCPT ); Tue, 4 Feb 2014 14:39:38 -0500 Received: from mail-pa0-f50.google.com ([209.85.220.50]:45674 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752828AbaBDTjf (ORCPT ); Tue, 4 Feb 2014 14:39:35 -0500 MIME-Version: 1.0 In-Reply-To: <20140204192325.GA11831@thunk.org> References: <2039634.jSmQAS6tdi@myon.chronox.de> <20140204170823.GF12768@thunk.org> <52F13A1C.3040003@zytor.com> <20140204192325.GA11831@thunk.org> Date: Tue, 4 Feb 2014 20:39:34 +0100 X-Google-Sender-Auth: FhodWGFVUR1NO_xB6du8Y_9cmfM Message-ID: Subject: Re: [RFC PATCH 0/5] CPU Jitter RNG From: Geert Uytterhoeven To: "Theodore Ts'o" , "H. Peter Anvin" , Stephan Mueller , =?UTF-8?Q?J=C3=B6rn_Engel?= , Linux Kernel Developers List , "Maciej W. Rozycki" , Ralf Baechle , dave.taht@gmail.com, John Crispin , andrewmcgr@gmail.com, Geert Uytterhoeven , Thorsten Glaser , sandyinchina@gmail.com Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 4, 2014 at 8:23 PM, wrote: > However, where a decade ago the ethernet card probably had its own > independent clock crystal/oscillator, I'm going to guess that these > days with SOC's and even on laptops, with ethernet device part of the > chipset, it is probably being driven off the same master oscillator. USB typically still has its own crystal. > I wonder if there's anyway we can either figure out manually, or > preferably, automatically at boot time, which devices actually have > independent clock oscillators. You may find this information in the DT on some platforms (if you're lucky). Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- 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/