From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 44A0B1F3D56; Thu, 13 Aug 2026 03:14:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786590863; cv=none; b=YK4eUdddjTVsD4BHVutu7HI9iEKszRYPuJyzvprRLfoViroaUQKjcLTuNJHZYhjd09P+JyefgKRGXXXZd4/nr6+Y7HNNCojz0uENBOhtXJcqxf0dHW96zD2PCnAObm8+BPZxAggbGDaPCDlvElZEf4sq49dGZppYjZbub9oKC04= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786590863; c=relaxed/simple; bh=xP2zXTYbMfRjX3pacD+Hiftur8QodXZQjlo4zfIV7+k=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=nwHVQf/Vn/H7MnxOGjJ/Q6Qfk94r5skWN2NTz53D1Y9jbpPfEFP/NyaXR5MKnVQC9VfO/uiuHJmK9H9AOWo/L3iLPzRwLye0D3f+Kb+ab3mkxiuUKIf+pkuatED26PU0tSWniX4mMw7n5DLFci22BtWmEIslC39xVEIW1XWaxLo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bc6rFx7e; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bc6rFx7e" 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260811122011.3539250-8-wenst@chromium.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!