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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 216E0C742A5 for ; Fri, 12 Jul 2019 06:49:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD66421019 for ; Fri, 12 Jul 2019 06:49:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="W96Oxc4/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726081AbfGLGtI (ORCPT ); Fri, 12 Jul 2019 02:49:08 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37570 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725562AbfGLGtC (ORCPT ); Fri, 12 Jul 2019 02:49:02 -0400 Received: by mail-pf1-f194.google.com with SMTP id 19so3882565pfa.4; Thu, 11 Jul 2019 23:49:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=yl2NBfkpJwuLVMdw2asUgipY8zUtavbdlBnw5Oda4sw=; b=W96Oxc4/aAuet9AVNiGnaebeH/1ChIBWNe2gJXHOWtIugBHhSWnGr45Zc/Hv+9CrSZ vVOfQTEfKMxL4jFYGSO9LKpzFiygIJRJGUlxi4tb51bx2hcaRkdNqTjKVP9auNIq5znA XJjHbqQGG2qzzhHPzX5qXoOls9omqqjgBk/WIf6GRadhwt9BmmBxm+A5oplIZ0Q4RlO6 ZpsCg24FV5zP7T2RBr/9fwd7eGpXb4G3HaGRxiNo+P8KzIPadknhHaJDvBo4iaXJgaKP Zl5FBx4kUuAmrULjRnieGVTfJ4jYXXBcUNsy9ZT34LHhPRBheT2YbuWlhLKfhULLwKM4 tA+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=yl2NBfkpJwuLVMdw2asUgipY8zUtavbdlBnw5Oda4sw=; b=D1KDsq7VyW7/y22sYjEU6XAUERPTbOIiuiUd1NJKhw43oo6fLLPNcLLlHXmjbFuj/E tm7ZRz0lxavciOkX52Bq+uVx8Iqv3EP1/MKIgX3ZOca+jDvdeq5Oq91bqUmRxDA33SYK xUrH3KJIq/hKgiB41TLTvqfR9I7rjzt2heaf2+mP/Djo8fvCZ7+hTeZPkWa3XrU7cMQ2 n1SwRC1OSi4A6eYqs9vdcfHWsV2JfOtfx557ACTfFwGD1/wBHy1QxWbqLka0Rks6HyvO ak5YUBL/F85h3IZIMLPwcUa4B8QckQiuI3YbZ5twG0kgk6b51p6uhYa0NwIbBf9hk6UB G02Q== X-Gm-Message-State: APjAAAVSUQAD880IEGAyQrTEeR3yVvYA5OPIQTCHxNmjb9wWV7wZD8Zt +4fv7ckVekdw1vIKn9ZW/YU= X-Google-Smtp-Source: APXvYqzc9hlWIPnDtxvJ5ooZ4TMTYCWxxWg2YPHvVp1mVQyYbWfl1vDwWW8scF3TiKrIyaGHANuDPw== X-Received: by 2002:a63:b10f:: with SMTP id r15mr8830830pgf.230.1562914140959; Thu, 11 Jul 2019 23:49:00 -0700 (PDT) Received: from dtor-ws ([2620:15c:202:201:3adc:b08c:7acc:b325]) by smtp.gmail.com with ESMTPSA id d15sm15704596pjc.8.2019.07.11.23.49.00 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 11 Jul 2019 23:49:00 -0700 (PDT) Date: Thu, 11 Jul 2019 23:48:58 -0700 From: Dmitry Torokhov To: Crag Wang Cc: yjjung@melfas.com, jsj1012@melfas.com, leesh832@lgdisplay.com, Mario Limonciello , chrome.os.engineering@dell.com, "Crag.Wang" , Sangwon Jee , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] input: touchscreen: add delay time to device power on Message-ID: <20190712064858.GD150689@dtor-ws> References: <20190710025859.6025-1-crag0715@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Crag, On Wed, Jul 10, 2019 at 04:58:40PM +0800, Crag Wang wrote: > Adding more > > On Wed, Jul 10, 2019 at 10:59 AM wrote: > > > > From: "Crag.Wang" > > > > Delay time for MELFAS MIP4 controller is required at power on stage > > regardless the existence of GPIO consumer lookup from devicetree or > > ACPI device table. > > > > There is an issue if GPIO ce is undefined in the ACPI results no delay > > time for deive power on, the controller ended up in an abnormal state. > > If kernel does not reset the controller it should not have to wait for reset to complete either. Since your firmware resets the controller it also has to conform to the timing requirements. Thanks. -- Dmitry