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=-9.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 EAF1FC43381 for ; Mon, 18 Feb 2019 10:19:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ACBC62173C for ; Mon, 18 Feb 2019 10:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550485175; bh=Fy781+TWhRN0X7yALYbCCqK1o9uwDhqc0to217CpXjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tKtDEHjEW3+k7E/l9tMm1wK+1BdH4tlKIBItarnq1X+0sg8z00PX7f1RxTeKD2Kna ZzVhklyY4dY+lgJ3cqEQ3jNP6V8BE+r0rHkyAIPBKP9KilG99GkKPgryTBZ7aeTF2p +AAKYZfx6qjbTc7+nu2by+MtkjSCLWgFR3YYHJF0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729583AbfBRKTf (ORCPT ); Mon, 18 Feb 2019 05:19:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:34794 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726166AbfBRKTe (ORCPT ); Mon, 18 Feb 2019 05:19:34 -0500 Received: from localhost.localdomain (unknown [106.200.226.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3FAE22175B; Mon, 18 Feb 2019 10:19:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550485173; bh=Fy781+TWhRN0X7yALYbCCqK1o9uwDhqc0to217CpXjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tIy9l3StqB3b3k0pDM1kWicCISnXIudRIsjqpsVb0s4cl8iQavG+jS2OsxqZA0Vfd IgPH5HySpTRYHD/QCGkJwvFrW4He8eTELNYo4OwSEwN0ukG3D+W0XSdyeKmOeTZ50a KYs/gNgLNbyj+6XEwNoHyRPBVoVxAu2us6Idj7k0= From: Vinod Koul To: David S Miller Cc: linux-arm-msm@vger.kernel.org, Bjorn Andersson , Vinod Koul , netdev@vger.kernel.org, Niklas Cassel , Andrew Lunn , Florian Fainelli , "Nori, Sekhar" , Peter Ujfalusi , Marc Gonzalez Subject: [PATCH v2 2/2] net: phy: at803x: disable delay only for RGMII mode Date: Mon, 18 Feb 2019 15:48:53 +0530 Message-Id: <20190218101853.4290-2-vkoul@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190218101853.4290-1-vkoul@kernel.org> References: <20190218101853.4290-1-vkoul@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Per "Documentation/devicetree/bindings/net/ethernet.txt" RGMII mode should not have delay in PHY wheras RGMII_ID and RGMII_RXID/RGMII_TXID can have delay in phy. So disable the delay only for RGMII mode and enable for other modes. Also treat the default case as disabled delays. Fixes: cd28d1d6e52e: ("net: phy: at803x: Disable phy delay for RGMII mode") Reported-by: Peter Ujfalusi Signed-off-by: Vinod Koul --- drivers/net/phy/at803x.c | 47 ++++++++++++++++++++++++++++++---------- 1 file changed, 36 insertions(+), 11 deletions(-) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index c6e7d800fd7a..dc1b13f7fc12 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -110,6 +110,18 @@ static int at803x_debug_reg_mask(struct phy_device *phydev, u16 reg, return phy_write(phydev, AT803X_DEBUG_DATA, val); } +static int at803x_enable_rx_delay(struct phy_device *phydev) +{ + return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, 0, + AT803X_DEBUG_RX_CLK_DLY_EN); +} + +static int at803x_enable_tx_delay(struct phy_device *phydev) +{ + return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5, 0, + AT803X_DEBUG_TX_CLK_DLY_EN); +} + static int at803x_disable_rx_delay(struct phy_device *phydev) { return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, @@ -255,23 +267,36 @@ static int at803x_config_init(struct phy_device *phydev) if (ret < 0) return ret; - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID || - phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || - phydev->interface == PHY_INTERFACE_MODE_RGMII) { - ret = at803x_disable_rx_delay(phydev); + /* The hardware register default is RX and TX delay enabled, so lets + * first disable the RX and TX delays in phy and enable them based + * on the mode selected + */ + ret = at803x_disable_rx_delay(phydev); + if (ret < 0) + return ret; + ret = at803x_disable_tx_delay(phydev); + if (ret < 0) + return ret; + + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || + phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) { + /* If RGMII_ID or RGMII_RXID are specified enable RX delay, + * otherwise keep it disabled + */ + ret = at803x_enable_rx_delay(phydev); if (ret < 0) return ret; } - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID || - phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || - phydev->interface == PHY_INTERFACE_MODE_RGMII) { - ret = at803x_disable_tx_delay(phydev); - if (ret < 0) - return ret; + if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || + phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) { + /* If RGMII_ID or RGMII_TXID are specified enable TX delay, + * otherwise keep it disabled + */ + ret = at803x_enable_tx_delay(phydev); } - return 0; + return ret; } static int at803x_ack_interrupt(struct phy_device *phydev) -- 2.20.1