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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 71A04C5AD5A for ; Thu, 13 Aug 2026 03:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=uGflFkaSRSLwt8cjOUfrI2G3kHK8o37reSjG+m13zz4=; b=jqiG/3k6QnTbq7zi8PZ7Cssxxl 89+wQLZ8bBv8Om2u3lVSHnkKhkh/5b3rvSjuTt9IgHyQGyaDOjGltTHcxXouV+RdN7Y3w7I+pT2P/ U7rRYx+e2JQjh4wLWirZUDJ+lgUjUgBVAV8hlHEjhotU9lmgT5wTKsClZPv3FeK39Ma9cGUGayqyO uZ/KSRRt8SVDdvso0k/lRCjNSr8J/0/530i9Zx4JaP37rLE2aZeq3atF1ll7AyHYb+eS2eyY0h8WX wvJFXO4DxcGguAaIZB4JgjdHEHZqp5tJYgj8/3ybLNT3imBM6DLqcKitvxxulCxPXJCvMs3oj9ITa s0OoVzKA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wuLtg-0000000HJ8T-2Msw; Thu, 13 Aug 2026 03:14:24 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wuLtf-0000000HJ8G-0QID; Thu, 13 Aug 2026 03:14:23 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 34513600AD; Thu, 13 Aug 2026 03:14:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66AA81F000E9; Thu, 13 Aug 2026 03:14:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786590861; bh=uGflFkaSRSLwt8cjOUfrI2G3kHK8o37reSjG+m13zz4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=bc6rFx7eALcIR6jfdK6CeFY10ziltAnQqytO+w7w+88p4DezqUye503z1W7/FUmWR kuEVQWkE/T6Ga7aE26jvkUl7Z6dzrsLeaozLXvv87RAdogJN+SkNfHHCZHp/J21Upf VuN/A1MtU0s6fZfE8ivUHU56gjmqzCf4hFpxStZNRl0vsxOgqzTheBJMWmmUYJoekn UK1CKNGavgUko45SRCwSDdMGN/16Dakcd5yc2a9KXWjBN3jbMfBS2V/kCOTlwZ/Mw5 59CMakHhVfW49MOPuLlyXLCK6T7EwCG10cDrfD67ePgumDvBKiPhvXLBwkR57yP0sE WXjy1CjxXcpTQ== Date: Thu, 13 Aug 2026 03:14:17 +0000 From: Tzung-Bi Shih To: Chen-Yu Tsai Cc: Mark Brown , Matthias Brugger , AngeloGioacchino Del Regno , Benson Leung , Dmitry Torokhov , Jiri Kosina , Andi Shyti , linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, chrome-platform@lists.linux.dev, linux-input@vger.kernel.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 7/9] platform/chrome: of_hw_prober: Add delay for hana trackpads Message-ID: References: <20260811122011.3539250-1-wenst@chromium.org> <20260811122011.3539250-8-wenst@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260811122011.3539250-8-wenst@chromium.org> X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On Tue, Aug 11, 2026 at 08:20:07PM +0800, Chen-Yu Tsai wrote: > Up until now, the MT8173 elm/hana device tree has set the dedicated > regulator supplying the trackpad as always-on, simply because the Elan > driver was missing proper delays. As a result the delay for the > Synaptics trackpad was also omitted, as it was not strictly required > under such a model and delayed the availability of the trackpad to the > user. > > The Elan driver recently gained proper delays after power-up, with > adaptive skipping of the delay if the regulator was originally > on. The I2C HID driver and I2C OF component prober library gained > similar adaptive delay skipping. The device tree will be fixed to have > the regulator not be always on, and proper post-power-on delay time > added to the I2C HID device. > > Also add the post-power-on delay to the ChromeOS OF component prober, > so that if the regulator is off at the time of probing, the prober knows > to wait for the hardware to initialize. > [...] This looks harmless even without the aforementioned patches. Applied to https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-next [7/9] platform/chrome: of_hw_prober: Add delay for hana trackpads commit: 81c1c0cb68a13d14dd1bbffcf4c49e26f9a6478c Thanks!