From patchwork Mon Mar 29 07:57:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 411452 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 CEF15C433E8 for ; Mon, 29 Mar 2021 08:23:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BDCE561554 for ; Mon, 29 Mar 2021 08:23:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233057AbhC2IXW (ORCPT ); Mon, 29 Mar 2021 04:23:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:38380 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233538AbhC2IVW (ORCPT ); Mon, 29 Mar 2021 04:21:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7814761932; Mon, 29 Mar 2021 08:21:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617006082; bh=Itvmwy1S2qgFEM+tQdjJCEoVy+P7Q+pNMr39gdJ9+AI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l46am3RkwEzreLKr15kvUGIbE2AOhQaiKPA4uFjLrLt+hm1HTmNECB22c7WsnSa5+ nCOcuVKlJ4PeqxvzxU+EGfZAlKVUBpkaNIbyT3LLpRPoBBjfoNm2XqDtPBOZmnrah8 H0rEVdJnQ+V4qJZQR1Bj949509JTO7fFhWK2j6Ug= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Florian Fainelli , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 112/221] net: phy: broadcom: Add power down exit reset state delay Date: Mon, 29 Mar 2021 09:57:23 +0200 Message-Id: <20210329075632.954177697@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075629.172032742@linuxfoundation.org> References: <20210329075629.172032742@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Florian Fainelli [ Upstream commit 7a1468ba0e02eee24ae1353e8933793a27198e20 ] Per the datasheet, when we clear the power down bit, the PHY remains in an internal reset state for 40us and then resume normal operation. Account for that delay to avoid any issues in the future if genphy_resume() changes. Fixes: fe26821fa614 ("net: phy: broadcom: Wire suspend/resume for BCM54810") Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/phy/broadcom.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c index cd271de9609b..69713ea36d4e 100644 --- a/drivers/net/phy/broadcom.c +++ b/drivers/net/phy/broadcom.c @@ -332,6 +332,11 @@ static int bcm54xx_resume(struct phy_device *phydev) if (ret < 0) return ret; + /* Upon exiting power down, the PHY remains in an internal reset state + * for 40us + */ + fsleep(40); + return bcm54xx_config_init(phydev); }