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dkim=none (message not signed) header.d=none; vger.kernel.org; dmarc=none action=none header.from=sifive.com; Received: from DM6PR13MB3451.namprd13.prod.outlook.com (2603:10b6:5:1c3::10) by DM5PR13MB1323.namprd13.prod.outlook.com (2603:10b6:3:28::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3564.15; Tue, 10 Nov 2020 15:22:24 +0000 Received: from DM6PR13MB3451.namprd13.prod.outlook.com ([fe80::d55:1263:fadc:b6f5]) by DM6PR13MB3451.namprd13.prod.outlook.com ([fe80::d55:1263:fadc:b6f5%5]) with mapi id 15.20.3564.021; Tue, 10 Nov 2020 15:22:24 +0000 From: Sagar Shrikant Kadam To: linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] dts: phy: fix missing mdio device and probe failure of vsc8541-01 device Date: Tue, 10 Nov 2020 07:22:10 -0800 Message-Id: <1605021732-268521-2-git-send-email-sagar.kadam@sifive.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1605021732-268521-1-git-send-email-sagar.kadam@sifive.com> References: <1605021732-268521-1-git-send-email-sagar.kadam@sifive.com> X-Originating-IP: [64.62.193.194] X-ClientProxiedBy: BYAPR21CA0005.namprd21.prod.outlook.com (2603:10b6:a03:114::15) To DM6PR13MB3451.namprd13.prod.outlook.com (2603:10b6:5:1c3::10) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from gamma15.internal.sifive.com (64.62.193.194) by BYAPR21CA0005.namprd21.prod.outlook.com (2603:10b6:a03:114::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3589.9 via Frontend Transport; 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SFS:(346002)(136003)(39850400004)(376002)(396003)(366004)(4326008)(83170400001)(6486002)(16526019)(2906002)(7416002)(186003)(2616005)(6916009)(8676002)(956004)(83380400001)(66556008)(42882007)(316002)(66476007)(107886003)(966005)(8936002)(7696005)(66946007)(36756003)(5660300002)(478600001)(26005)(52116002)(6666004); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: c89d592b-cac0-48f4-4868-08d8858c6d39 X-MS-Exchange-CrossTenant-AuthSource: DM6PR13MB3451.namprd13.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Nov 2020 15:22:24.8190 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: /W1DZmGqHXCFnBfbPd8EB+XKirvyRkExaLHNLCU3XBlrHOAOGtFsbAuBqCOiVVm1a5eaAonyPUsCGH7d92bbDg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR13MB1323 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201110_102227_208229_ACDD23F3 X-CRM114-Status: GOOD ( 13.99 ) X-Spam-Score: 0.1 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [40.107.94.87 listed in list.dnswl.org] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [40.107.94.87 listed in wl.mailspike.net] 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 MSGID_FROM_MTA_HEADER Message-Id was added by a relay X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, aou@eecs.berkeley.edu, kernel@esmil.dk, anup@brainfault.org, atish.patra@wdc.com, yash.shah@sifive.com, robh+dt@kernel.org, alistair.francis@wdc.com, Sagar Shrikant Kadam , paul.walmsley@sifive.com, palmer@dabbelt.com, linux-riscv@lists.infradead.org Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org HiFive unleashed A00 board has VSC8541-01 ethernet phy, this device is identified as a Revision B device as described in device identification registers. In order to use this phy in the unmanaged mode, it requires a specific reset sequence of logical 0-1-0-1 transition on the NRESET pin as documented here [1]. Currently, the bootloader (fsbl or u-boot-spl) takes care of the phy reset. If due to some reason the phy device hasn't received the reset by the prior stages before the linux macb driver comes into the picture, the MACB mii bus gets probed but the mdio scan fails and is not even able to read the phy ID registers. It gives an error message: "libphy: MACB_mii_bus: probed mdio_bus 10090000.ethernet-ffffffff: MDIO device at address 0 is missing." Thus adding the device OUI (Organizationally Unique Identifier) to the phy device node helps to probe the phy device. [1]: VSC8541-01 datasheet: https://www.mouser.com/ds/2/523/Microsemi_VSC8541-01_Datasheet_10496_V40-1148034.pdf Signed-off-by: Sagar Shrikant Kadam --- arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts index 4a2729f..60846e8 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts @@ -88,6 +88,7 @@ phy-mode = "gmii"; phy-handle = <&phy0>; phy0: ethernet-phy@0 { + compatible = "ethernet-phy-id0007.0771"; reg = <0>; }; };