From patchwork Tue Mar 30 13:54:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 12172637 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 11984C433C1 for ; Tue, 30 Mar 2021 13:57:38 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 89397619BD for ; Tue, 30 Mar 2021 13:57:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89397619BD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=seQMFYKE0ZeWpQsYzBw6qzExjuBVowgLpui/F0isA50=; b=MY8TYuefNZTlcca7Lqjrtb8ay 6Z4s6Pn2U89yn5ABTj8qwsBufQcuQhjKZL3TCyE4DwvuYmmILM/kyM0+3EtjRAI33ZXkZq+0s26RE RsWMwoZCQOrTl8DIsEGtB6DbBQ2281SAMQeDtunOrnDfEfVNWtPadRP+9V0V5Gh8DUgg9sD/FABi7 vK9Qbz64kfmpX0AEcDPE5j9Ln8zME2erJMrK2c8W1ITmC/QofOZoINUitGHzKtVFiE7LBxM3gbg5F +wb26Ato2jncTQfYx0R6Rvg8a3d1/JjHKW7SgumHYBTdVPrKeQWuo4cVG0BjisMCM+LTDSvCSr5dD HcDbyWoGA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lREqw-003tAg-78; Tue, 30 Mar 2021 13:56:18 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lREou-003sks-Nt for linux-arm-kernel@lists.infradead.org; Tue, 30 Mar 2021 13:56:15 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lREos-0006Q3-3h; Tue, 30 Mar 2021 15:54:10 +0200 Received: from ore by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lREoq-0004Rb-Ol; Tue, 30 Mar 2021 15:54:08 +0200 From: Oleksij Rempel To: Shawn Guo , Sascha Hauer , Andrew Lunn , Florian Fainelli , Heiner Kallweit , Fugang Duan Cc: Oleksij Rempel , kernel@pengutronix.de, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-imx@nxp.com, Fabio Estevam , David Jander , Russell King , Philippe Schenker Subject: [PATCH net-next v1 2/3] net: phy: at803x: AR8085: add loopback support Date: Tue, 30 Mar 2021 15:54:06 +0200 Message-Id: <20210330135407.17010-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210330135407.17010-1-o.rempel@pengutronix.de> References: <20210330135407.17010-1-o.rempel@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210330_145613_096696_2961BD1A X-CRM114-Status: GOOD ( 14.13 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org PHY loopback is needed for the ethernet controller self test support. This PHY was tested with the FEC sefltest. Signed-off-by: Oleksij Rempel --- drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index d7799beb811c..8679738cf2ab 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -326,6 +326,30 @@ static int at803x_resume(struct phy_device *phydev) return phy_modify(phydev, MII_BMCR, BMCR_PDOWN | BMCR_ISOLATE, 0); } +static int at803x_loopback(struct phy_device *phydev, bool enable) +{ + int ret; + + if (enable) + ret = phy_clear_bits(phydev, MII_BMCR, BMCR_ANENABLE); + else + ret = phy_set_bits(phydev, MII_BMCR, BMCR_ANENABLE); + + if (ret) + return ret; + + ret = genphy_loopback(phydev, enable); + + /* + * Loop back needs some time to start transmitting packets in the loop. + * Documentation says nothing about it, so I take time which seems to + * work on AR8085. + */ + msleep(1); + + return ret; +} + static int at803x_rgmii_reg_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector) { @@ -1128,6 +1152,7 @@ static struct phy_driver at803x_driver[] = { .get_wol = at803x_get_wol, .suspend = at803x_suspend, .resume = at803x_resume, + .set_loopback = at803x_loopback, /* PHY_GBIT_FEATURES */ .read_status = at803x_read_status, .config_intr = at803x_config_intr,