From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-m16.yeah.net (mail-m16.yeah.net [1.95.21.16]) (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 5F78823C51D; Tue, 11 Nov 2025 07:42:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=1.95.21.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762846976; cv=none; b=MbsYbmONEMh8y7/v7S+e+lsx/IIDnTZ/oT/VIKlAADxtIWjXnu9H027FKDELA0TkD+SGaC5BcwYzMPn3QfqbjEZgXYiClBq+c2gdfIGaHrZ8sz4SXyc8tgz42nE0n0GszOwGqUgsqsnNBxX1Ngyc18vrK35qByp9n85AakW+i/Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762846976; c=relaxed/simple; bh=8Ma8E6DFc1TdTBvoMfms9xPqoBsMOchLDJ+KmE8BDe8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=UK0yEuU7/mM/wSvoJ8IhcmgTth19uekQLsJmH5Tpkl7BjV7GsQ4KUdhRjTnabqA35W1RUTfM8ioghFrEdcXcCf73Av0go6OT/7cWsE6EIYNLfzXSfoij54ewWtDoJ0wRAx6NtzPhEarDhlkvh4Xo2/f47xPzLCywmDQgmneNINo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yeah.net; spf=pass smtp.mailfrom=yeah.net; dkim=pass (1024-bit key) header.d=yeah.net header.i=@yeah.net header.b=ODO/kGMq; arc=none smtp.client-ip=1.95.21.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=yeah.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=yeah.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=yeah.net header.i=@yeah.net header.b="ODO/kGMq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yeah.net; s=s110527; h=Date:From:To:Subject:Message-ID:MIME-Version: Content-Type; bh=nhDPWcHQwhbMDsBD0V/t6hKlH/MXgCs801GiP87Z/q0=; b=ODO/kGMqFbRqTC0v8r+qERLvSla7r6KNWJ77O80rPbP6codeYkA5nzwEg4h+O4 gh5LhHWzo8deItXNDdhj4Nqr62RI+0yVSQEb/y1Hm34fRiLb0kURqkYZZC+BKkYR FcWKgs7vfgrFpVkC2XwQHSgRdbNtUezUJ3sSaFHwsJHxg= Received: from dragon (unknown []) by gzsmtp1 (Coremail) with SMTP id Mc8vCgBXvWOT4RJpfZLkAA--.5262S3; Tue, 11 Nov 2025 15:11:17 +0800 (CST) Date: Tue, 11 Nov 2025 15:11:14 +0800 From: Shawn Guo To: Richard Zhu Cc: frank.li@nxp.com, l.stach@pengutronix.de, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, bhelgaas@google.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 01/11] arm64: dts: imx95-15x15-evk: Add supports-clkreq property to PCIe M.2 port Message-ID: References: <20251015030428.2980427-1-hongxing.zhu@nxp.com> <20251015030428.2980427-2-hongxing.zhu@nxp.com> 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: <20251015030428.2980427-2-hongxing.zhu@nxp.com> X-CM-TRANSID:Mc8vCgBXvWOT4RJpfZLkAA--.5262S3 X-Coremail-Antispam: 1Uf129KBjvJXoW7Wr1kCFy3ur1DXFy8Cr4kWFg_yoW8Jr4rpa y8CFZ7Jr1xGF4fGanFqFyrKr98ta93JF4Uur1jgryUKrW5CF97tr48Crs3Wr4Y9w4fCw4f ZF10vwnaqrWYvaUanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07U3EfrUUUUU= X-CM-SenderInfo: pvkd40hjxrjqh1hdxhhqhw/1tbiOBV84WkS4ZUOIwAA3S On Wed, Oct 15, 2025 at 11:04:18AM +0800, Richard Zhu wrote: > According to PCIe r6.1, sec 5.5.1. > > The following rules define how the L1.1 and L1.2 substates are entered: > Both the Upstream and Downstream Ports must monitor the logical state of > the CLKREQ# signal. > > Typical implement is using open drain, which connect RC's clkreq# to > EP's clkreq# together and pull up clkreq#. > > imx95-15x15-evk matches this requirement, so add supports-clkreq to > allow PCIe device enter ASPM L1 Sub-State. > > Signed-off-by: Richard Zhu > --- > arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > index 148243470dd4a..3ee032c154fa3 100644 > --- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > @@ -556,6 +556,7 @@ &pcie0 { > pinctrl-names = "default"; > reset-gpio = <&gpio5 13 GPIO_ACTIVE_LOW>; > vpcie-supply = <®_m2_pwr>; > + supports-clkreq; Is binding updated for this property? Shawn > status = "okay"; > }; > > -- > 2.37.1 >