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 735B91E5702; Mon, 9 Jun 2025 14:37:36 +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=1749479856; cv=none; b=UcsGxpTgb8zpqr4uSKSg4ne8dlpBDRMHhJc0zgmd1gZd8GDD72ELYwa51JyrMCuwPd9BB+ujqNb+F+tln0II1vAhru+2xS3LLd3MdEhf6PdxeJ4ITPv/rR6agSra6IzbBgqqFKUGioOlq7uNxc+naXvSpW6u0f1lat2iHqU3nH8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749479856; c=relaxed/simple; bh=2sfPGZXf9nL04ZmKYHBs6lFfZZyiD7KoRwG4xEmoK1A=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=vAxC6J+ApEVq4PAVdcexfHaQjopoeWUxhcuJFWVL3eLqQCqaVF/tOzMsI5M71HZmpsQM00Qkl8S7I1NNhr9IDOGEyxbqBi75VzoSBEdB2h3YwqeMBwSHT5FVxqw1oog2gJzdNCzlWGO76kvEN3MyMZScBvDIzb3XgLeOGiA1XK8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XyxXw5I8; 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="XyxXw5I8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1BD43C4CEEB; Mon, 9 Jun 2025 14:37:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749479856; bh=2sfPGZXf9nL04ZmKYHBs6lFfZZyiD7KoRwG4xEmoK1A=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=XyxXw5I8SoayKLpxOhzvrSwjw1yl5O2mDErpWdmZx8j3cyJJz4ItrkVO2Da/Yujol wiaH9pLYhFX0WDwm5FHlb8TnB/93yk2IaD+KU0fv/Kj979l7pVdQjXuU1Xg6l25xn/ HzdobK81V7/OHpJFi4UbnhudzLfUfqizucJWCZIjhQshZtc5eWh3nq/xHCC3DxFjSI DmCJWWw8IaCKY0dSJIHGmo7jOeFTNm8sjt87q13moTxQtORqZ4jh+b9sLxsTT+39zU EPVFn9cwyw0y1CVTYkOsR97pOcklzZli6CJBYskZJMLHBKO1E0eYA/C/34laalTs/K dgJyuuJ0o1tyg== Date: Mon, 9 Jun 2025 09:37:34 -0500 From: Bjorn Helgaas To: Krishna Chaitanya Chundru Cc: andersson@kernel.org, robh@kernel.org, dmitry.baryshkov@linaro.org, manivannan.sadhasivam@linaro.org, krzk@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, quic_vbadigan@quicinc.com, sherry.sun@nxp.com Subject: Re: [PATCH] schemas: PCI: Add standard PCIe WAKE# signal Message-ID: <20250609143734.GA749760@bhelgaas> Precedence: bulk X-Mailing-List: devicetree@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: <20250515090517.3506772-1-krishna.chundru@oss.qualcomm.com> On Thu, May 15, 2025 at 02:35:17PM +0530, Krishna Chaitanya Chundru wrote: > As per PCIe spec 6, sec 5.3.3.2 document PCI standard WAKE# signal, > which is used to re-establish power and reference clocks to the > components within its domain. > > Signed-off-by: Krishna Chaitanya Chundru > --- > dtschema/schemas/pci/pci-bus-common.yaml | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/dtschema/schemas/pci/pci-bus-common.yaml b/dtschema/schemas/pci/pci-bus-common.yaml > index ca97a00..a39fafc 100644 > --- a/dtschema/schemas/pci/pci-bus-common.yaml > +++ b/dtschema/schemas/pci/pci-bus-common.yaml > @@ -142,6 +142,10 @@ properties: > description: GPIO controlled connection to PERST# signal > maxItems: 1 > > + wake-gpios: > + description: GPIO controlled connection to WAKE# signal "GPIO controlled" makes it sound like the GPIO can assert or deassert the WAKE# signal. But isn't WAKE# driven ("controlled") by a PCIe endpoint, and this GPIO would be input-only at the other end to sense the state of WAKE#?