Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752729AbaFMHZY (ORCPT ); Fri, 13 Jun 2014 03:25:24 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:15861 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752513AbaFMHZT (ORCPT ); Fri, 13 Jun 2014 03:25:19 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Fri, 13 Jun 2014 00:19:57 -0700 Date: Fri, 13 Jun 2014 10:25:14 +0300 From: Peter De Schrijver To: Stephen Warren CC: Russell King , Paul Gortmaker , Daniel Lezcano , Thomas Gleixner , Thierry Reding , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "linux-tegra@vger.kernel.org" Subject: Re: [PATCH 0/3] Use Tegra's microsecond counter for udelay() Message-ID: <20140613072514.GL5961@tbergstrom-lnx.Nvidia.com> References: <1402588713-18766-1-git-send-email-pdeschrijver@nvidia.com> <539A01B4.3050503@wwwdotorg.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <539A01B4.3050503@wwwdotorg.org> X-NVConfidentiality: public User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 12, 2014 at 09:38:28PM +0200, Stephen Warren wrote: > On 06/12/2014 09:58 AM, Peter De Schrijver wrote: > > This patchset introduces support for Tegra's microsecond counter as the > > udelay() timer. This is useful on Tegra SoCs which do not have an arch timer > > such as Tegra20 and Tegra30. Using the microsecond counter instead of a delay > > based loop avoids potential problems during cpu frequency changes. > > > > The set consists of 3 patches: > > > > Patch 1 introduces a new call which is used by the ARM architecture delay > > timer code to prevent changing the delay timer after calibration is finished > > and thus can be in use. > > > > Patch 2 adds logic to choose the delay timer with the highest resolution. This > > allows the same registration code to be used on all Tegra SoCs and yet use the > > higher resolution arch timer when available (eg on Tegra114 or Tegra124). > > > > Patch 3 adds the actual delay timer code. > > > > Patch set has been verified on ventana (Tegra20), beaver (Tegra30), > > dalmore (Tegra114) and jetson TK1 (Tegra124). > > Russell, Paul, do patches 1 and 2 look good to you? If so, if you can > ack them, I'd be happy to queue this series in the Tegra git tree. If > that doesn't work for you, please let me know who will apply these > patches. Thanks. > > > Changes since v1: > > * Address review comments > > That's not a very useful description of the changes, and there's no "V2" > in the subject... Yes... something went wrong it seems... -- 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/