Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757601AbcDGWKf (ORCPT ); Thu, 7 Apr 2016 18:10:35 -0400 Received: from avon.wwwdotorg.org ([70.85.31.133]:56686 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751760AbcDGWKe (ORCPT ); Thu, 7 Apr 2016 18:10:34 -0400 Subject: Re: [PATCH] pinctrl: tegra: clear park bit for all pins To: Rhyland Klein , Linus Walleij References: <1460065028-26169-1-git-send-email-rklein@nvidia.com> Cc: Thierry Reding , Alexandre Courbot , linux-gpio@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org From: Stephen Warren Message-ID: <5706DAD5.9020805@wwwdotorg.org> Date: Thu, 7 Apr 2016 16:10:29 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1460065028-26169-1-git-send-email-rklein@nvidia.com> Content-Type: text/plain; charset=windows-1252; 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: 611 Lines: 17 On 04/07/2016 03:37 PM, Rhyland Klein wrote: > Parking bits might not be cleared by the bootloader properly (if for > instance it doesn't use the device configured by that pin). Clear > the park bits for all the pins during pinctrl probe. > > This is present on T210 platforms but not earlier ones, so for earlier > generations, set parked_reg = -1 to disable. > > The park bit is used to prevent glitching when reprogramming pinctrl > registers. > > Based on work by: > Shravani Dingari > > Signed-off-by: Rhyland Klein Acked-by: Stephen Warren