From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752465AbcF1QcB (ORCPT ); Tue, 28 Jun 2016 12:32:01 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:8372 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752164AbcF1Qb7 (ORCPT ); Tue, 28 Jun 2016 12:31:59 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Tue, 28 Jun 2016 09:29:10 -0700 Subject: Re: [PATCH v5] clk: tegra: Initialize UTMIPLL when enabling PLLU To: Rhyland Klein , Thierry Reding References: <1464280891-23036-1-git-send-email-rklein@nvidia.com> <5763FFF5.5000303@nvidia.com> <20160617152336.GA27475@ulmo.ba.sec> CC: Peter De Schrijver , Mike Turquette , Stephen Warren , "Stephen Boyd" , Alexandre Courbot , "linux-clk@vger.kernel.org" , "linux-tegra@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "Andrew Bresticker" From: Jon Hunter Message-ID: <5772A618.4020207@nvidia.com> Date: Tue, 28 Jun 2016 17:30:16 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 MIME-Version: 1.0 In-Reply-To: X-Originating-IP: [10.21.132.149] X-ClientProxiedBy: UKMAIL102.nvidia.com (10.26.138.15) To UKMAIL102.nvidia.com (10.26.138.15) Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rhyland, On 27/06/16 19:11, Rhyland Klein wrote: > Jonathan, can you confirm replacing usleep_range(100, 200) with udelay(2) works for you? Yes for me, using a udelay(2) does seem to work. I have made sure that a usb device is still detected on the Jetson TX1. However, I am not sure the best way to test this thoroughly. If we do make this change it would be good to propagate downstream as well to get wider testing. Cheers Jon -- nvpublic