From nobody Thu Apr 2 00:15:17 2026 Received: from mxout70.expurgate.net (mxout70.expurgate.net [194.37.255.70]) (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 394683CEBAD; Wed, 1 Apr 2026 09:31:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.37.255.70 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775035917; cv=none; b=c1pLKo51VtYTblEziJennBIfSJcPFZFyfUVf0TAK9irNFEO7Y5dlxnCYFg/52ox0QdOA8mv7a6OU4uT9MMmCxWiJC/M+aMWEYET60ybM6InXDjcvK0NMSp1dAOmnEuYpFhEKO1d1mPFoS3hcgQUpqAMYa6HESiNkp5LSM3mX4dg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775035917; c=relaxed/simple; bh=coHmsdtqcsW+dKyhuAd7vn7jGgDFbg9jYRqHLyenC9w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:References: In-Reply-To:To:Cc; b=PndI7CifZV9S0qHtZqaxGpA1nj+8YWmQuNlvOqY9tpWROre0s8xHcn847DdMpRHHjJWLu9edzIiabDtNrQYyXvjIKlq5hkcRIpNVoQDDqfBATJaHFm4BBODAQPgtHBzQlBbEyhO43pyFzOw2+Hw7/c5rNGoqTYl79BNONovQ5DU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dev.tdt.de; spf=pass smtp.mailfrom=dev.tdt.de; dkim=temperror (0-bit key) header.d=dev.tdt.de header.i=@dev.tdt.de header.b=pkp8mrrb; arc=none smtp.client-ip=194.37.255.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dev.tdt.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dev.tdt.de Authentication-Results: smtp.subspace.kernel.org; dkim=temperror (0-bit key) header.d=dev.tdt.de header.i=@dev.tdt.de header.b="pkp8mrrb" Received: from [194.37.255.9] (helo=mxout.expurgate.net) by relay.expurgate.net with smtp (Exim 4.92) (envelope-from ) id 1w7rvM-001SzK-Le; Wed, 01 Apr 2026 11:31:44 +0200 Received: from [195.243.126.94] (helo=securemail.tdt.de) by relay.expurgate.net with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1w7rvM-003a8t-42; Wed, 01 Apr 2026 11:31:44 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dev.tdt.de; s=z1-selector1; t=1775035903; bh=eTw8E3ezVzDUqc+dP4JdW7vl/OP8CGUQKxaL+SejZ2g=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=pkp8mrrbEocjtIIeeWx7LvW2p+rex33JmWAdUFFo2Xt6lo1MxFHgGG8A39m2kRM8Z G+8bbTmNnSNh5Bd3OuhomSHK72YxqDkP7Od4Sjow88G9xHyRzbBqbYa02ksqe9bDS/ A/1LKyHbCpeRWlvxX5MehNNieWSQEvyK2tFV+LcvHEccc4tAQwsbu0Ytz7flX2aUUE BGFU8wYR79A6aV+NKGqldlNDXDZvWQNganaZrCFD6cQTxxTnveuYEpKWVk4dUH/Fp4 0e5BPY9cRrNkUo2uOirRcxWxsuprJh+iEDd4hhYRyOkiLmMeOgaM9k6cIBkRwGEfgC Q0eUubrw0UUIw== Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id A3A8824004F; Wed, 1 Apr 2026 11:31:43 +0200 (CEST) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 97FCB240046; Wed, 1 Apr 2026 11:31:43 +0200 (CEST) Received: from [10.2.3.40] (unknown [10.2.3.40]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 792D023C6F; Wed, 1 Apr 2026 11:31:43 +0200 (CEST) From: Florian Eckert Date: Wed, 01 Apr 2026 11:31:40 +0200 Subject: [PATCH v3 4/7] PCI: intel-gw: Enable clock before phy init 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20260401-pcie-intel-gw-v3-4-63b008c5b7b2@dev.tdt.de> References: <20260401-pcie-intel-gw-v3-0-63b008c5b7b2@dev.tdt.de> In-Reply-To: <20260401-pcie-intel-gw-v3-0-63b008c5b7b2@dev.tdt.de> To: Lorenzo Pieralisi , =?utf-8?Q?Krzysztof_Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Johan Hovold , Sajid Dalvi , Ajay Agarwal , Krzysztof Kozlowski , Conor Dooley , Rahul Tanwar Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Florian Eckert , Eckert.Florian@googlemail.com, ms@dev.tdt.de X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775035902; l=2080; i=fe@dev.tdt.de; s=20260205; h=from:subject:message-id; bh=coHmsdtqcsW+dKyhuAd7vn7jGgDFbg9jYRqHLyenC9w=; b=upmlMIqhxzzCBzYMxjiufaXeChhcEK6DMbp8eW3nyfpQ7M1+fzt4eU9xZ55SaDbLFN01wVifK 9ljfiAJ+60WDY/2pEJ2kFQYvV3VVXGr3Yh4tS/9zZvC+foq3A8n9Hzb X-Developer-Key: i=fe@dev.tdt.de; a=ed25519; pk=q7Pvv3Au2sAVRhBz5UF7ZqUPNxUwXQ78Jdqu8E6Negk= X-purgate-ID: 151534::1775035904-3D7CA233-2D4E2C4D/0/0 X-purgate: clean X-purgate-type: clean To ensure that the boot sequence is correct, the dwc pcie core clock must be switched on before phy init call [1]. This changes are based on patched kernel sources of the MaxLinear SDK. [1] https://github.com/maxlinear/linux/blob/updk_9.1.90/drivers/pci/control= ler/dwc/pcie-intel-gw.c#L544 Signed-off-by: Florian Eckert --- drivers/pci/controller/dwc/pcie-intel-gw.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/contr= oller/dwc/pcie-intel-gw.c index e88b8243cc41c607c39e4d58c4dcd8c8c082e8b0..6d9499d954674a26a74bff56b7f= b5759767424c0 100644 --- a/drivers/pci/controller/dwc/pcie-intel-gw.c +++ b/drivers/pci/controller/dwc/pcie-intel-gw.c @@ -291,13 +291,9 @@ static int intel_pcie_host_setup(struct intel_pcie *pc= ie) =20 intel_pcie_core_rst_assert(pcie); intel_pcie_device_rst_assert(pcie); - - ret =3D phy_init(pcie->phy); - if (ret) - return ret; - intel_pcie_core_rst_deassert(pcie); =20 + /* Controller clock must be provided earlier than PHY */ ret =3D clk_prepare_enable(pcie->core_clk); if (ret) { dev_err(pcie->pci.dev, "Core clock enable failed: %d\n", ret); @@ -306,13 +302,17 @@ static int intel_pcie_host_setup(struct intel_pcie *p= cie) =20 pci->atu_base =3D pci->dbi_base + 0xC0000; =20 + ret =3D phy_init(pcie->phy); + if (ret) + goto phy_err; + intel_pcie_ltssm_disable(pcie); intel_pcie_link_setup(pcie); intel_pcie_init_n_fts(pci); =20 ret =3D dw_pcie_setup_rc(&pci->pp); if (ret) - goto app_init_err; + goto err; =20 dw_pcie_upconfig_setup(pci); =20 @@ -321,17 +321,18 @@ static int intel_pcie_host_setup(struct intel_pcie *p= cie) =20 ret =3D dw_pcie_wait_for_link(pci); if (ret) - goto app_init_err; + goto err; =20 intel_pcie_core_irq_enable(pcie); =20 return 0; =20 -app_init_err: +err: + phy_exit(pcie->phy); +phy_err: clk_disable_unprepare(pcie->core_clk); clk_err: intel_pcie_core_rst_assert(pcie); - phy_exit(pcie->phy); =20 return ret; } --=20 2.47.3