From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0375C3815B for ; Wed, 15 Apr 2020 12:51:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C07562076D for ; Wed, 15 Apr 2020 12:51:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586955082; bh=jj+n4cVYzfXD5WkI24w4Q0E7n1bzv+HT304nlg3hHMs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rebpB0KTRNcBu8M+ptQ9Dl7Rw37rQ+aoe8iL3o+PCJ+0rg7hQzQhk9eSep7Fwm9yR NfNMC7r2h9qlqXhhslPm6mMjVynJviVJ4aUFG26cZSNM4yZQkiya9Rh2+VN5gmL5Ck VNdezN4xlF2RdIzeEEfvYW8XvgltdTkevm69mNGY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2409025AbgDOMvS (ORCPT ); Wed, 15 Apr 2020 08:51:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:34262 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405947AbgDOLms (ORCPT ); Wed, 15 Apr 2020 07:42:48 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 20DF820737; Wed, 15 Apr 2020 11:42:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586950967; bh=jj+n4cVYzfXD5WkI24w4Q0E7n1bzv+HT304nlg3hHMs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RjfpRPL5RexMW0l5qbgr8JblHceNcbljcsE2qMqe7FVZdIxuOW5WFTxguFB2WNCJ+ XOFBJu7S9RUG1DAj+41bl6S64a0sHq/myPa8MkLjkpe1Z/DzIxhXYibr0C5Wn4onT4 UNrrLOeDsQ4N9zQ5oH06ukEyPY/vNmOyUkyChnmg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jon Hunter , Thierry Reding , Sasha Levin , linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH AUTOSEL 5.5 017/106] arm64: tegra: Fix Tegra194 PCIe compatible string Date: Wed, 15 Apr 2020 07:40:57 -0400 Message-Id: <20200415114226.13103-17-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200415114226.13103-1-sashal@kernel.org> References: <20200415114226.13103-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Jon Hunter [ Upstream commit f9f711efd441ad0d22874be49986d92121862335 ] If the kernel configuration option CONFIG_PCIE_DW_PLAT_HOST is enabled then this can cause the kernel to incorrectly probe the generic designware PCIe platform driver instead of the Tegra194 designware PCIe driver. This causes a boot failure on Tegra194 because the necessary configuration to access the hardware is not performed. The order in which the compatible strings are populated in Device-Tree is not relevant in this case, because the kernel will attempt to probe the device as soon as a driver is loaded and if the generic designware PCIe driver is loaded first, then this driver will be probed first. Therefore, to fix this problem, remove the "snps,dw-pcie" string from the compatible string as we never want this driver to be probe on Tegra194. Fixes: 2602c32f15e7 ("arm64: tegra: Add P2U and PCIe controller nodes to Tegra194 DT") Signed-off-by: Jon Hunter Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- .../devicetree/bindings/pci/nvidia,tegra194-pcie.txt | 2 +- arch/arm64/boot/dts/nvidia/tegra194.dtsi | 12 ++++++------ 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt index b739f92da58e5..1f90eb39870be 100644 --- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt +++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt @@ -118,7 +118,7 @@ Tegra194: -------- pcie@14180000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>; reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */ diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi index 2c8fae854a23e..2b6f0b9aaf902 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi @@ -1152,7 +1152,7 @@ }; pcie@14100000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX1A>; reg = <0x00 0x14100000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x30000000 0x0 0x00040000 /* configuration space (256K) */ @@ -1197,7 +1197,7 @@ }; pcie@14120000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX1A>; reg = <0x00 0x14120000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x32000000 0x0 0x00040000 /* configuration space (256K) */ @@ -1242,7 +1242,7 @@ }; pcie@14140000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX1A>; reg = <0x00 0x14140000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x34000000 0x0 0x00040000 /* configuration space (256K) */ @@ -1287,7 +1287,7 @@ }; pcie@14160000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX4A>; reg = <0x00 0x14160000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x36000000 0x0 0x00040000 /* configuration space (256K) */ @@ -1332,7 +1332,7 @@ }; pcie@14180000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8B>; reg = <0x00 0x14180000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x38000000 0x0 0x00040000 /* configuration space (256K) */ @@ -1377,7 +1377,7 @@ }; pcie@141a0000 { - compatible = "nvidia,tegra194-pcie", "snps,dw-pcie"; + compatible = "nvidia,tegra194-pcie"; power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8A>; reg = <0x00 0x141a0000 0x0 0x00020000 /* appl registers (128K) */ 0x00 0x3a000000 0x0 0x00040000 /* configuration space (256K) */ -- 2.20.1