From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E4EB3CA6F; Thu, 19 Feb 2026 13:45:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771508729; cv=none; b=W7bqr28MNOYlmtA2CgvqZzS4k3UVzq3KTRaxrbIK3Lc6q2WSE7ifuXqV3Vt0hMouEEvx4WC2REyKNv+uPcRncJkDVLv1bGsx/oXwjymqUMtJclnK/AZfBm4OEnu9CjS8F/GjNBZiSYlpeWw3xS38dakvyxGsNhd142owwjnjCnA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771508729; c=relaxed/simple; bh=YNhO5Ar2EvZfD+jNSpkur8t2JjgD5F5KFNpP+al4NSI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=qFccK24IJhqtKROGVN/dnZDRzwWRQBG35k+Hci9ET214VL79xxNAlug110H9/osZ50wRpR6NOKQdYA6PxyxmK3MZ28lWbFlDSvXctx1PdR+6QB2v1dxMmX72ECaiXppu8bpQ/S7LyzoWty8bWnFn5D73wAwyG+RFhLgCbFEWj2Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QoaomqNf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QoaomqNf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 551C2C4CEF7; Thu, 19 Feb 2026 13:45:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771508728; bh=YNhO5Ar2EvZfD+jNSpkur8t2JjgD5F5KFNpP+al4NSI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=QoaomqNfKl5dE/L3S0IJ5q5qwRKsGNgjqxKICtkDVgc8Y3YiWO2z6RybGxQ2s/dk0 DHbnzA9idwGFAiZ5ZgBwf/MM4Cgxv2lENCZ0P8eHcI9dnXGfMZ+Fz2Hrkp85beOtZ6 locSoQ/8WbJnfBY/WhJIOcuzfvVuqBC5ecCa/WmI4KnY/uYMvRzclvqsNgeastPXTC P8shbDMXsiEiohi3A5vdZXr4hblcUNds2srGUrD45AnCD8HwRhczEubmIUaZwlM1iT c+J0EPf2BUbHAmXEi8V0P8TmNTM/NujOx3SgDBkBT0DDa8xDNsjHgduT9ern3PaSXs vayYfKEaqlGZA== Date: Thu, 19 Feb 2026 07:45:27 -0600 From: Rob Herring To: Krishna Chaitanya Chundru Cc: andersson@kernel.org, mani@kernel.org, krzk@kernel.org, helgaas@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, lpieralisi@kernel.org, kw@linux.com, conor+dt@kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree-spec@vger.kernel.org, lukas@wunner.de Subject: Re: [PATCH v4] schemas: pci: Document PCIe T_POWER_ON Message-ID: <20260219134527.GA2438773-robh@kernel.org> References: <20260205093346.667898-1-krishna.chundru@oss.qualcomm.com> 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: <20260205093346.667898-1-krishna.chundru@oss.qualcomm.com> On Thu, Feb 05, 2026 at 03:03:46PM +0530, Krishna Chaitanya Chundru wrote: > >From PCIe r7, sec 5.5.4 & Table 5-11 in sec 5.5.5 T_POWER_ON is the > minimum amount of time (in us) that each component must wait in L1.2.Exit > after sampling CLKREQ# asserted before actively driving the interface to > ensure no device is ever actively driving into an unpowered component and > these values are based on the components and AC coupling capacitors used > in the connection linking the two components. > > This property should be used to indicate the T_POWER_ON and drivers using > this property are responsible for programming both the scale and the value > of T_POWER_ON to comply with the PCIe specification. > > Signed-off-by: Krishna Chaitanya Chundru > Acked-by: Manivannan Sadhasivam Applied, thanks.