From patchwork Wed Oct 26 09:09:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Siddharth Vadapalli X-Patchwork-Id: 13020380 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 4BEC2C38A2D for ; Wed, 26 Oct 2022 09:12:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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=StXRq480i4YmWGaOmp7XlsJWylvMZjx+HWRlX8SCeQU=; b=njNOqQDSxFZUnV AvJeqwwvDndhWyi03m16MZ9WQb5XaQUxDceboh37KliL+G8P1LcRHYKzUVOSdGVXcqZipMeQSVGml Ez14H2HnAZp4AEbIyFmy7jT/QveSupaUg5ckupyyZiCeVR4soe10UZroRv2darHznZQBiAVtsXNSA F4l2iRefUKfvKKG2TODItQJWL0aiGXxdYMYihKVv6bA7rzh3TpdJJM5VRrIz0vudPUEXEqse6XwJg QkiGd3TtQlrZoZbjImGR/KFD3CMbRIbYjGTtBkPBD5dtooP1CRfG+7CeQGlHPiHJvFQwdgWy1awpw /9NI/yZS7EMunMSAH97A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oncRQ-008gQE-KY; Wed, 26 Oct 2022 09:11:16 +0000 Received: from fllv0015.ext.ti.com ([198.47.19.141]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oncQe-008g7u-Md for linux-arm-kernel@lists.infradead.org; Wed, 26 Oct 2022 09:10:30 +0000 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 29Q9AIn2005932; Wed, 26 Oct 2022 04:10:18 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1666775418; bh=L6LdHRO5MG5avprXD4ic8aHDCe3/bQHvKFboizyJl8o=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=P+avpxK79BdUpwN/jnbJsV5R9JeHDoLYvsZeCLzoSkkch18OYmfSbYwn7O3trlKzk EBR6nn+fbDNABvB8DPVPfzxvD8u2xcNhBu+KMOEEKxDXySMIj8ZU8QQx7GM8ES7iXn JUBG8jp2YvoONd9qRrbrBM9BvT002uA952WwTx5Q= Received: from DLEE108.ent.ti.com (dlee108.ent.ti.com [157.170.170.38]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 29Q9AIkC125170 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 26 Oct 2022 04:10:18 -0500 Received: from DLEE100.ent.ti.com (157.170.170.30) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6; Wed, 26 Oct 2022 04:10:17 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.6 via Frontend Transport; Wed, 26 Oct 2022 04:10:17 -0500 Received: from uda0492258.dhcp.ti.com (ileaxei01-snat.itg.ti.com [10.180.69.5]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 29Q99wxs005870; Wed, 26 Oct 2022 04:10:13 -0500 From: Siddharth Vadapalli To: , , , , , , , , , , CC: , , , , Subject: [PATCH v3 3/3] net: ethernet: ti: am65-cpsw: Add support for SERDES configuration Date: Wed, 26 Oct 2022 14:39:57 +0530 Message-ID: <20221026090957.180592-4-s-vadapalli@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026090957.180592-1-s-vadapalli@ti.com> References: <20221026090957.180592-1-s-vadapalli@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221026_021028_888984_862A5052 X-CRM114-Status: GOOD ( 16.72 ) 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 Use PHY framework APIs to initialize the SERDES PHY connected to CPSW MAC. Define the functions am65_cpsw_disable_phy(), am65_cpsw_enable_phy(), am65_cpsw_disable_serdes_phy() and am65_cpsw_enable_serdes_phy(). Power on and initialize the SerDes PHY in am65_cpsw_nuss_init_slave_ports() by invoking am65_cpsw_enable_serdes_phy(). Power off the SerDes PHY in am65_cpsw_nuss_remove() by invoking am65_cpsw_disable_serdes_phy(). Signed-off-by: Siddharth Vadapalli --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 65 ++++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index 91e294afc3ad..519ebd371dd8 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -1403,6 +1403,65 @@ static const struct net_device_ops am65_cpsw_nuss_netdev_ops = { .ndo_get_devlink_port = am65_cpsw_ndo_get_devlink_port, }; +static void am65_cpsw_disable_phy(struct phy *phy) +{ + phy_power_off(phy); + phy_exit(phy); +} + +static int am65_cpsw_enable_phy(struct phy *phy) +{ + int ret; + + ret = phy_init(phy); + if (ret < 0) + return ret; + + ret = phy_power_on(phy); + if (ret < 0) { + phy_exit(phy); + return ret; + } + + return 0; +} + +static void am65_cpsw_disable_serdes_phy(struct am65_cpsw_common *common) +{ + struct device_node *node, *port_np; + struct device *dev = common->dev; + const char *name = "serdes-phy"; + struct phy *phy; + + node = of_get_child_by_name(dev->of_node, "ethernet-ports"); + + for_each_child_of_node(node, port_np) { + phy = devm_of_phy_get(dev, port_np, name); + am65_cpsw_disable_phy(phy); + } +} + +static int am65_cpsw_init_serdes_phy(struct device *dev, struct device_node *port_np) +{ + const char *name = "serdes-phy"; + struct phy *phy; + int ret; + + phy = devm_of_phy_get(dev, port_np, name); + if (PTR_ERR(phy) == -ENODEV) + return 0; + + ret = am65_cpsw_enable_phy(phy); + if (ret < 0) + goto err_phy; + + return 0; + +err_phy: + devm_phy_put(dev, phy); + return ret; +} + static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state) { @@ -1880,6 +1939,11 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common) goto of_node_put; } + /* Initialize the phy for the port */ + ret = am65_cpsw_init_serdes_phy(dev, port_np); + if (ret) + return ret; + port->slave.mac_only = of_property_read_bool(port_np, "ti,mac-only"); @@ -2833,6 +2897,7 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev) am65_cpsw_nuss_phylink_cleanup(common); am65_cpsw_unregister_devlink(common); + am65_cpsw_disable_serdes_phy(common); am65_cpsw_unregister_notifiers(common); /* must unregister ndevs here because DD release_driver routine calls