From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87D15C43143 for ; Sat, 29 Sep 2018 13:25:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 39FBA206B2 for ; Sat, 29 Sep 2018 13:25:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="etyeaefE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 39FBA206B2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728299AbeI2Tx7 (ORCPT ); Sat, 29 Sep 2018 15:53:59 -0400 Received: from mail.kernel.org ([198.145.29.99]:52698 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728077AbeI2Tx6 (ORCPT ); Sat, 29 Sep 2018 15:53:58 -0400 Received: from [192.168.1.75] (cpe-24-28-70-126.austin.res.rr.com [24.28.70.126]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2C847206B2; Sat, 29 Sep 2018 13:25:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1538227531; bh=+cJR0VnpRJ1Z59/fYsownE5L5SjIOJ4yjJVn3kbUuRw=; h=Subject:From:To:Cc:References:Date:In-Reply-To:From; b=etyeaefENyIx/EHTiw/FZJklDXbrdVjPNRdI9yFS/13e8BBtIKOxb8VwgnskgDyI0 hwp7eosPaWkFm4brdYgnbLBR1GHclV69L+AmnH+aISxCddFFYFu9vdu/nmGTsE7XIG b/pjW9WaJoVXtbJLFejfa3DuqRibCbDArLyiPP0o= Subject: Re: [PATCH v2] gpiolib: Show correct direction from the beginning From: Timur Tabi To: Ricardo Ribalda Delgado Cc: jhugo@codeaurora.org, swboyd@chromium.org, LKML , Linus Walleij , linux-gpio@vger.kernel.org References: <20180921103604.13361-1-ricardo.ribalda@gmail.com> <20180921103604.13361-2-ricardo.ribalda@gmail.com> <153803107307.119890.10052910965015646333@swboyd.mtv.corp.google.com> <3e07cab8-0f3e-7474-8f6d-e6bb16e8f998@codeaurora.org> <5aea282d-6fc9-cd70-cec4-10f28aa819b9@codeaurora.org> <9df3f61f-ac54-f5b1-6b86-db539e07c5bd@kernel.org> Message-ID: Date: Sat, 29 Sep 2018 08:25:30 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <9df3f61f-ac54-f5b1-6b86-db539e07c5bd@kernel.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/29/18 8:21 AM, Timur Tabi wrote: > >> Is it possible to access the hardware? > > Linaro and some Linux OSVs should still have systems, but I usually just > ask Jeff to test code for me. Alternatively, you can just add valid_mask support to your driver, and add a check to your get_direction() function to see if it ever is asked to access an invalid GPIO.