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Mon, 22 Jun 2020 15:06:09 +0000 From: Calvin Johnson To: Jeremy Linton , Russell King - ARM Linux admin , Jon , Cristi Sovaiala , Ioana Ciornei , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Madalin Bucur Cc: netdev@vger.kernel.org, linux.cj@gmail.com, Calvin Johnson Subject: [net-next PATCH v3 1/3] net: phy: Allow mdio buses to auto-probe c45 devices Date: Mon, 22 Jun 2020 20:35:32 +0530 Message-Id: <20200622150534.27482-2-calvin.johnson@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200622150534.27482-1-calvin.johnson@oss.nxp.com> References: <20200622150534.27482-1-calvin.johnson@oss.nxp.com> X-ClientProxiedBy: SG2PR03CA0115.apcprd03.prod.outlook.com (2603:1096:4:91::19) To AM0PR04MB5636.eurprd04.prod.outlook.com (2603:10a6:208:130::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv03152.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR03CA0115.apcprd03.prod.outlook.com (2603:1096:4:91::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3131.10 via Frontend Transport; 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This works fairly well in most cases, but its possible that a c45 device doesn't respond despite being a standard phy. If the parent hardware is capable, it makes sense to scan for c22 devices before falling back to c45. As we want this to reflect the capabilities of the STA, lets add a field to the mii_bus structure to represent the capability. That way devices can opt into the extended scanning. Existing users should continue to default to c22 only scanning as long as they are zero'ing the structure before use. Signed-off-by: Jeremy Linton Signed-off-by: Calvin Johnson --- Changes in v3: - handle case MDIOBUS_NO_CAP Changes in v2: - Reserve "0" to mean that no mdiobus capabilities have been declared. drivers/net/phy/mdio_bus.c | 18 ++++++++++++++++-- include/linux/phy.h | 8 ++++++++ 2 files changed, 24 insertions(+), 2 deletions(-) -- 2.17.1 diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c index 6ceee82b2839..ab9233c558d8 100644 --- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -739,10 +739,24 @@ EXPORT_SYMBOL(mdiobus_free); */ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr) { - struct phy_device *phydev; + struct phy_device *phydev = ERR_PTR(-ENODEV); int err; - phydev = get_phy_device(bus, addr, false); + switch (bus->probe_capabilities) { + case MDIOBUS_NO_CAP: + case MDIOBUS_C22: + phydev = get_phy_device(bus, addr, false); + break; + case MDIOBUS_C45: + phydev = get_phy_device(bus, addr, true); + break; + case MDIOBUS_C22_C45: + phydev = get_phy_device(bus, addr, false); + if (IS_ERR(phydev)) + phydev = get_phy_device(bus, addr, true); + break; + } + if (IS_ERR(phydev)) return phydev; diff --git a/include/linux/phy.h b/include/linux/phy.h index 9248dd2ce4ca..7860d56c6bf5 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -298,6 +298,14 @@ struct mii_bus { /* RESET GPIO descriptor pointer */ struct gpio_desc *reset_gpiod; + /* bus capabilities, used for probing */ + enum { + MDIOBUS_NO_CAP = 0, + MDIOBUS_C22, + MDIOBUS_C45, + MDIOBUS_C22_C45, + } probe_capabilities; + /* protect access to the shared element */ struct mutex shared_lock; From patchwork Mon Jun 22 15:05:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Calvin Johnson X-Patchwork-Id: 191364 Delivered-To: patch@linaro.org Received: by 2002:a92:1f07:0:0:0:0:0 with SMTP id i7csp1124353ile; Mon, 22 Jun 2020 08:06:22 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy1iZlL03VWf6gUmNOduF898k5IE/QJnZaQkCnXmuTXqQ8hTkXW77GmYYvociYPWxLwxXjJ X-Received: by 2002:a05:6402:1606:: with SMTP id f6mr16878892edv.286.1592838382680; Mon, 22 Jun 2020 08:06:22 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1592838382; cv=pass; d=google.com; s=arc-20160816; b=cuC6YBWO9PhsIT1jyKDv46UEEtsuCFhv8E5VgOxZO4EpsCb1XhuOoHyx5YS+rI3VA6 VJAhfgsbEWW3PrHrb3ts9sJOgYxjVl9nz+SF8Mw9i/5e4BWVVVvt1l8zKoOLIYl59E/z 9tgOrIIWDU1Vy/ftwwNFnTVCawg656rxGlt0seKaqDqV5+OXEA3TYxLxc6lLKpq6QkPR t2FO2mE4O2bIJLzbFdnF8QUQj/CRSb2KPJ/i0RdGWqpjKbJ6cUjySKsDV/YRDiCubd0M 75ivzajhiPz74nUG7xGqtNpPVMlsSBwmn1ZfI2mvamQ7B98Qa1VfKQ8OURrlpJFYlyCi Tz8g== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=9RSMy93/Z670E4QZrOsK7Fyl1gPiV3rIn7Naw8XtO0Y=; b=qDn1WUCb4MHRVsFy0Vocl1uQhUBVTFD3EP87KH04e0atxs0oO/E9XJMJZFhqtrKJn4 f31714/LO8q22lTDNPl7WfiJrK4kRgD46Glr5fi57FTLrCeYwGL4ZOF2A1koeAEmwyN4 XmC188CaWJYnRJsSR+XLan2PbE/mNquRLAXG/usEhp5CRIEAzwZ69yH/rfYBHozCg2WY r8niEHeXXUWC8U3jdY/jCSeI0nFqMZxYAbADizupB3veyE1ykTNK4O/PNEr4TdJ4FCwM 5HdXYEu9EH7sZTASCgWcmmb+JvSAk14qSc7RfFPsDwjjWzwhb3HEfQehFEPjHp8YJC9X u9uQ== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@NXP1.onmicrosoft.com header.s=selector2-NXP1-onmicrosoft-com header.b=B1g1X5P4; arc=pass (i=1 spf=pass spfdomain=oss.nxp.com dkim=pass dkdomain=oss.nxp.com dmarc=pass fromdomain=oss.nxp.com); spf=pass (google.com: domain of netdev-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=netdev-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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Mon, 22 Jun 2020 15:06:16 +0000 From: Calvin Johnson To: Jeremy Linton , Russell King - ARM Linux admin , Jon , Cristi Sovaiala , Ioana Ciornei , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Madalin Bucur Cc: netdev@vger.kernel.org, linux.cj@gmail.com, Calvin Johnson Subject: [net-next PATCH v3 3/3] net/fsl: enable extended scanning in xgmac_mdio Date: Mon, 22 Jun 2020 20:35:34 +0530 Message-Id: <20200622150534.27482-4-calvin.johnson@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200622150534.27482-1-calvin.johnson@oss.nxp.com> References: <20200622150534.27482-1-calvin.johnson@oss.nxp.com> X-ClientProxiedBy: SG2PR03CA0115.apcprd03.prod.outlook.com (2603:1096:4:91::19) To AM0PR04MB5636.eurprd04.prod.outlook.com (2603:10a6:208:130::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv03152.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR03CA0115.apcprd03.prod.outlook.com (2603:1096:4:91::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3131.10 via Frontend Transport; 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If we fail to find any, then it will fall back to c45 automatically. Signed-off-by: Jeremy Linton Signed-off-by: Calvin Johnson --- Changes in v3: None Changes in v2: None drivers/net/ethernet/freescale/xgmac_mdio.c | 1 + 1 file changed, 1 insertion(+) -- 2.17.1 diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c index b4ed5f837975..98be51d8b08c 100644 --- a/drivers/net/ethernet/freescale/xgmac_mdio.c +++ b/drivers/net/ethernet/freescale/xgmac_mdio.c @@ -268,6 +268,7 @@ static int xgmac_mdio_probe(struct platform_device *pdev) bus->read = xgmac_mdio_read; bus->write = xgmac_mdio_write; bus->parent = &pdev->dev; + bus->probe_capabilities = MDIOBUS_C22_C45; snprintf(bus->id, MII_BUS_ID_SIZE, "%pa", &res->start); /* Set the PHY base address */