From patchwork Sat Aug 20 21:37:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Couzens X-Patchwork-Id: 12949835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B414CC25B08 for ; Sat, 20 Aug 2022 21:37:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XVdSO+LLShiZFjjo6gZ2NwG/b06thMWpGK03N4kUpYI=; b=dNYcilCPF5S0cUVTNfNmNwMzj4 /q7HOgCCrupAIvDkPYpC+IP/2JidWlylECgmr54ToY0MK92g2LgUi5c6lZfz42FB7s7CtTwyC+xnc 1oZrEMhJDytOON6dzPrMB82BDcrR3mir0FCAhpD+neLJ8+1BV2qUrwQfl/bMSR2sAZjX6bNKuP70u iqEKcyBdtPJA7pTjsBrmPnlwcLqzPOWAfXWVvsGbjPiNgS03G2UvqxqQZyTrSt4Hc826DPLeXdBuG sw2kp+i8MCe8vuNrn0O2ojs1WDOQYu9tXfCViKFxbxwBD2bbEwBxEiyMqvtLoEu+0Y1FNVQm2Dha5 G76g9yNQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oPWA9-00CXPE-49; Sat, 20 Aug 2022 21:37:49 +0000 Received: from mail.base45.de ([2001:67c:2050:320::77]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oPWA6-00CXMt-1i for linux-mediatek@lists.infradead.org; Sat, 20 Aug 2022 21:37:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=fe80.eu; s=20190804; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=XVdSO+LLShiZFjjo6gZ2NwG/b06thMWpGK03N4kUpYI=; b=Hap6V3GTUX/nYHEuKAdPEgZF+w 8wxrlcyg4lbdUdppjfeFjMzxuwp0gMRSsqEj6HOMk9KatCPy8CmWX4XaY3ad4ZU08D8USOSQKHLhA m3C65MyshDrOWy5U7e53VSUmI8cllbXF5c/x3tGCUDXLqljiQ8659ZUUmsj6vrXXB1ZuH2fRFpEBX zcQBRDZWOIufmjJvNXYdHs30prcGE+NLCyzEC4kWGVroaa4wu1xszRyPu1BQiWR0+hYW1ScEfMCGl 6HRJ8+iJ5Vh9PKUEyuAdOXx25/AmIzSoMCYrlForGc2Jx9zGTsu7s/1xJWKppFFcWd/xoWETlulhz T3Q1NjuA==; Received: from [2a02:2454:9869:1a:9eb6:54ff:0:fa5] (helo=cerator.lan) by mail.base45.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oPW9q-00G1Te-QT; Sat, 20 Aug 2022 21:37:30 +0000 From: Alexander Couzens To: Sean Wang , Landen Chao , DENG Qingfang Cc: Andrew Lunn , "David S . Miller" , Daniel Golle , netdev@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, Alexander Couzens Subject: [PATCH 2/2] net: mt7531: ensure all MACs are powered down before reset Date: Sat, 20 Aug 2022 23:37:07 +0200 Message-Id: <20220820213707.46138-2-lynxis@fe80.eu> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220820213707.46138-1-lynxis@fe80.eu> References: <20220820213707.46138-1-lynxis@fe80.eu> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220820_143746_436320_D559C27E X-CRM114-Status: UNSURE ( 8.03 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org The datasheet [1] explicit describes it as requirement for a reset. [1] MT7531 Reference Manual for Development Board rev 1.0, page 735 Signed-off-by: Alexander Couzens --- drivers/net/dsa/mt7530.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index 95a57aeb466e..409d5c3d76ea 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -2329,6 +2329,10 @@ mt7531_setup(struct dsa_switch *ds) return -ENODEV; } + /* all MACs must be forced link-down before sw reset */ + for (i = 0; i < MT7530_NUM_PORTS; i++) + mt7530_write(priv, MT7530_PMCR_P(i), MT7531_FORCE_LNK); + /* Reset the switch through internal reset */ mt7530_write(priv, MT7530_SYS_CTRL, SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST |