From patchwork Tue Feb 19 06:18:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 10819279 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5B39314E1 for ; Tue, 19 Feb 2019 06:18:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4847D2B925 for ; Tue, 19 Feb 2019 06:18:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C6FC2B96A; Tue, 19 Feb 2019 06:18:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B67182B925 for ; Tue, 19 Feb 2019 06:18:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726232AbfBSGSt (ORCPT ); Tue, 19 Feb 2019 01:18:49 -0500 Received: from mail.kernel.org ([198.145.29.99]:50068 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbfBSGSt (ORCPT ); Tue, 19 Feb 2019 01:18:49 -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 EE130217D7; Tue, 19 Feb 2019 06:18:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550557128; bh=6T0OWyOG69uBqqDHiCfDbmGyb8OXZYZ9QSfIuqLz5I4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2XqjxAR6+0wYt3YVUXdGf9DwnaicWRsLK/GKnv7SBsjgx+4xhZeMwSpWMBChOgykh 661seNybpaUbxa6ExS5cXHWKXq8OJnExXdLKLDt8fc5ppF6KlydWrQB4+KcHeQ3Phu TWXDz3D3jxVn9Yp1gBobRKQfUnM7cJZBaDWO1wX4= 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 , Peter Ujfalusi Subject: [PATCH net-next v3 2/2] net: phy: at803x: disable delay only for RGMII mode Date: Tue, 19 Feb 2019 11:48:00 +0530 Message-Id: <20190219061800.31025-3-vkoul@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190219061800.31025-1-vkoul@kernel.org> References: <20190219061800.31025-1-vkoul@kernel.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Per "Documentation/devicetree/bindings/net/ethernet.txt" RGMII mode should not have delay in PHY whereas 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 Reviewed-by: Niklas Cassel Tested-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)