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=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 346EBC433DB for ; Wed, 20 Jan 2021 01:29:45 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C339D20449 for ; Wed, 20 Jan 2021 01:29:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C339D20449 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=pwHmL3Qs3Z1YJNhKx3EJXqBML8HBmaONtEcdzcMgkYE=; b=QhjUI9eAevAT71vdK0MGAFuTR N1H3Q8YfqTGHK7Qjkz9M17FEO/4dgdqPwKAdvY9ltQw8r6eQaTklmBwbkI2+EAo8/zCQRPw1Q1y/T gTnjrlPV84RpC6hmUbGHtKKwQo/RalAvzewtHgZPD//U6OKV1kUBeDwPzFevwWOp3vsIkj6KEcRdn Kl18n5h5x9jepPpvxRj5+DZZC901EnjVy5R2fmZiVUceKjFbr4OO16P00TC4oYUvBUGdbEOYslrAs HSJDH1k1Bm5LbzY+u0OeYEkJ9Nxv9e8XWTS7rTuPODWG9LhhdEzFLX6P6xCyXV4U5CZ9v2OYNAyRo 8dF7F7aWw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l22JR-0004Y4-LI; Wed, 20 Jan 2021 01:29:33 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l22HQ-0003JQ-Oc for linux-riscv@lists.infradead.org; Wed, 20 Jan 2021 01:27:30 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0DA3C23132; Wed, 20 Jan 2021 01:27:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611106047; bh=owIngL+z287/Db33e2oPnaB1cVU/Og2SEo74Yox/CZI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qATTsf3CUlGFqOD3WhwiI6KEkT5LJ8+TePLhxnfA0cdwyCym3Wys2dhHo5uzjfxgr E4BQLnL8R1Wa4IddPeAJT1CBqRwgTscbgNq05sVNwcAVe8xMrU4aapkMr1KLRfnvfO zd7UEjQ84pmgictEkdUBbvWO2V6OoDP28JW+mVKymvANXgIa9KLyq1/MunMF6NJBb3 muqvapx4OAtu2YHPcooHegWi/o/objNJNR7Ta5wdAyImJkM9lLBQw2nZoozqF+nkVA eiDVY21m7+IPqALwEHEEH5wzgZDI3i92c+r2I+k2mNpT6T7C0blehve9lPk9RS6Msq nVtIKYCFxzhlw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 17/26] dts: phy: fix missing mdio device and probe failure of vsc8541-01 device Date: Tue, 19 Jan 2021 20:26:54 -0500 Message-Id: <20210120012704.770095-17-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210120012704.770095-1-sashal@kernel.org> References: <20210120012704.770095-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210119_202728_978115_E72417A3 X-CRM114-Status: GOOD ( 12.49 ) 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: Sasha Levin , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, Palmer Dabbelt , Sagar Shrikant Kadam Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Sagar Shrikant Kadam [ Upstream commit be969b7cfbcfa8a835a528f1dc467f0975c6d883 ] 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 Signed-off-by: Palmer Dabbelt Signed-off-by: Sasha Levin --- 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 88cfcb96bf233..cc04e66752aac 100644 --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts @@ -83,6 +83,7 @@ ð0 { phy-mode = "gmii"; phy-handle = <&phy0>; phy0: ethernet-phy@0 { + compatible = "ethernet-phy-id0007.0771"; reg = <0>; }; }; -- 2.27.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv