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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 461ACC433F5 for ; Wed, 18 May 2022 21:32:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243179AbiERVch (ORCPT ); Wed, 18 May 2022 17:32:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40544 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243183AbiERVcg (ORCPT ); Wed, 18 May 2022 17:32:36 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80BCAEAD27 for ; Wed, 18 May 2022 14:32:35 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id n8so3012671plh.1 for ; Wed, 18 May 2022 14:32:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=LEBuP1smfHbrFMnQWxiF1WNb8X9aoOFQRhV8B6HKU/Y=; b=PD/AR/282opE0tnaQHXAeFM7T7i/LhG6QYHUwr/ABh3z0k27RfeNattJWk4NIxTggw leLoBskpnWiAxyhiSrsA9KmTCfvNGOCctsZGsJEerYRYxN74ftNtrTjU1DjfJqEHYjRa bDt8zjQmM6YRGdn4WudYd76g5AADwxYaPwhkuS3BwlPPSYeEzam29vtPomSMrh4mwVCQ 6KlyJTRPFYXEWWiEdL39xMpvISPuETnvATDgGcZAkGSDq4VkBi0MKVokgFHnXDkL7ada ZLvGm57yf6yenMcI2uUBpeQwkyxJlz9OtNcYLP/rQOnZNzZ7rR0Tib/5hYNoMg6D8TjF moug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=LEBuP1smfHbrFMnQWxiF1WNb8X9aoOFQRhV8B6HKU/Y=; b=RWbeRpB5liVw9fe1P69tl6sXrdrLYpJ311Iw/ozqq1Ni8FLCT3ju93DYUyB1Oqg8aW QpAMk8KIcF0mutvOGnBiOeTgUWDQrqKFMqnKGg36gbh/bXGpFNDlVNWaxjIm1MK2b6hX Wj9FOD/5RBFGBPbyDx4RVhbT26g83vE5IoM9QoK4OiyC5fV3zWKb+D/scRNKVhL3fSlY uhZasgQLn3XqlAGmRfqiTzUFyMgJ3C9gDEYx+3wcgtfpanTWuezcOrQpfcvZtnFUULys HKA+wj81GbeAYK1PGnB09YENTFKXeZ8OmthXnDyHrvRZMiAW01zibTBGTHBh6tEE0lmt vXbg== X-Gm-Message-State: AOAM532D6OfECfywK7yBV+M2MkGTNPU/7m33RNSITtO+HVk8DOp05O6U s9EtUDSkKinS1URWo47DjWM= X-Google-Smtp-Source: ABdhPJzWdruTe+FVyGn9Uyv+PCqXCA5s1d2JpkpEWfkYOrIh2xwEIMlpXfdtwzjHIUysNRKZFPa8MQ== X-Received: by 2002:a17:902:9a4c:b0:158:b6f0:4aa2 with SMTP id x12-20020a1709029a4c00b00158b6f04aa2mr1487143plv.163.1652909554791; Wed, 18 May 2022 14:32:34 -0700 (PDT) Received: from google.com ([2620:15c:202:201:1a53:727c:6847:3659]) by smtp.gmail.com with ESMTPSA id u1-20020a170902e80100b0015e8d4eb21asm2161622plg.100.2022.05.18.14.32.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 May 2022 14:32:33 -0700 (PDT) Date: Wed, 18 May 2022 14:32:31 -0700 From: Dmitry Torokhov To: Marek Vasut Cc: linux-input@vger.kernel.org Subject: Re: [PATCH v2] Input: ili210x - Fix reset timing Message-ID: References: <20220518204901.93534-1-marex@denx.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220518204901.93534-1-marex@denx.de> Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org On Wed, May 18, 2022 at 10:49:01PM +0200, Marek Vasut wrote: > According to Ilitek "231x & ILI251x Programming Guide" Version: 2.30 > "2.1. Power Sequence", "T4 Chip Reset and discharge time" is minimum > 10ms and "T2 Chip initial time" is maximum 150ms. Adjust the reset > timings such that T4 is 12ms and T2 is 160ms to fit those figures. > > This prevents sporadic touch controller start up failures when some > systems with at least ILI251x controller boot, without this patch > the systems sometimes fail to communicate with the touch controller. > > Fixes: 201f3c803544c ("Input: ili210x - add reset GPIO support") > Signed-off-by: Marek Vasut > Cc: Dmitry Torokhov Applied, thank you. -- Dmitry