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Wysocki" , Jeremy Linton , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Russell King - ARM Linux admin , Cristi Sovaiala , Florin Laurentiu Chiculita , Ioana Ciornei , Madalin Bucur , Heikki Krogerus , Marcin Wojtas , Pieter Jansen Van Vuuren , Jon , Saravana Kannan , Randy Dunlap Cc: linux-arm-kernel@lists.infradead.org, Diana Madalina Craciun , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux.cj@gmail.com, netdev@vger.kernel.org, Laurentiu Tudor , Calvin Johnson , "David S. Miller" , Heiner Kallweit , Jakub Kicinski Subject: [net-next PATCH v7 11/16] net: mdio: Add ACPI support code for mdio Date: Thu, 11 Mar 2021 11:50:06 +0530 Message-Id: <20210311062011.8054-12-calvin.johnson@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210311062011.8054-1-calvin.johnson@oss.nxp.com> References: <20210311062011.8054-1-calvin.johnson@oss.nxp.com> X-Originating-IP: [14.142.151.118] X-ClientProxiedBy: HKAPR03CA0026.apcprd03.prod.outlook.com (2603:1096:203:c9::13) 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 HKAPR03CA0026.apcprd03.prod.outlook.com (2603:1096:203:c9::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3955.9 via Frontend Transport; Thu, 11 Mar 2021 06:22:14 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 73afef84-a474-43cf-7b15-08d8e45607b8 X-MS-TrafficTypeDiagnostic: AM0PR04MB6611: X-MS-Exchange-SharedMailbox-RoutingAgent-Processed: True X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7691; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: NXvJMNi6BWcmRN/mbZVTFOSJFJ+VSRfnTvdH1e6BkiyoLuN6egGBq2g1+FAn7FVSf7K20C5WMUdMGVzGhdaxu+J4EWFAsef9GsDapCBQdM44ArDsNVCi5aOB4C6ypp0bZMdulHSMSH3cdlH4LyeQuOzsx58Aj0WVMOp/bkL9xUqLeAl7rWasB0F89d7ZYUU2ZZeltKi4LCXJ0cOtc3q7Fac1MU2REtdW1RPyA5XH539FzcqXcCUHS5rKtE3ZFL+AVj3MQDEAis3rBTbi/BHgn+wEqUUM/Palb/Xz7yWTrpvMladI6drXfiB4kW0utojitdfXpUxQZQITj1U6FsBjF6BsPotHckuEWfossogkmKYpSYe5jOQh+Wsnbnlebdc0K1dY5NUeV+mJgighspq6ffwkRt5ieoU8IyUlcFpXznJfXDoK6KZyrtmIEnOvTH0PJ8yoerAov4baofpwgC4ZIK84X/LbZ1aIcXMVUrN00VWYm85NhDjFk//xfnCwtz4jlrGE/8Sxa+cMcLkDfgytUaRJu+1a4FhaNGAEJYF61G71BDxtw3DiuXKlzyw81hnFbIYkj98umsISGAs3JZULJg== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR04MB5636.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(4636009)(136003)(39860400002)(396003)(376002)(366004)(346002)(2906002)(921005)(16526019)(26005)(186003)(83380400001)(6486002)(8936002)(6506007)(66556008)(66946007)(55236004)(66476007)(44832011)(478600001)(6512007)(2616005)(316002)(54906003)(5660300002)(956004)(1006002)(52116002)(8676002)(6666004)(110136005)(86362001)(4326008)(7416002)(1076003)(110426009);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 73afef84-a474-43cf-7b15-08d8e45607b8 X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB5636.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Mar 2021 06:22:22.3524 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 6MWSBTvH3QGa9W3hJIeFvkc05ImmU1GsAxj0qt8qhBXNDDR3530W2u/fseZ5BTEY6iMzaYFF6DxZudBYLfFnJQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB6611 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Define acpi_mdiobus_register() to Register mii_bus and create PHYs for each ACPI child node. Signed-off-by: Calvin Johnson --- Changes in v7: - Include headers directly used in acpi_mdio.c Changes in v6: - use GENMASK() and ACPI_COMPANION_SET() - some cleanup - remove unwanted header inclusion Changes in v5: - add missing MODULE_LICENSE() - replace fwnode_get_id() with OF and ACPI function calls Changes in v4: None Changes in v3: None Changes in v2: None MAINTAINERS | 1 + drivers/net/mdio/Kconfig | 7 +++++ drivers/net/mdio/Makefile | 1 + drivers/net/mdio/acpi_mdio.c | 56 ++++++++++++++++++++++++++++++++++++ include/linux/acpi_mdio.h | 25 ++++++++++++++++ 5 files changed, 90 insertions(+) create mode 100644 drivers/net/mdio/acpi_mdio.c create mode 100644 include/linux/acpi_mdio.h diff --git a/MAINTAINERS b/MAINTAINERS index 146de41d2656..051377b7fa94 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6680,6 +6680,7 @@ F: Documentation/devicetree/bindings/net/mdio* F: Documentation/devicetree/bindings/net/qca,ar803x.yaml F: Documentation/networking/phy.rst F: drivers/net/mdio/ +F: drivers/net/mdio/acpi_mdio.c F: drivers/net/mdio/fwnode_mdio.c F: drivers/net/mdio/of_mdio.c F: drivers/net/pcs/ diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index 2d5bf5ccffb5..fc8c787b448f 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -36,6 +36,13 @@ config OF_MDIO help OpenFirmware MDIO bus (Ethernet PHY) accessors +config ACPI_MDIO + def_tristate PHYLIB + depends on ACPI + depends on PHYLIB + help + ACPI MDIO bus (Ethernet PHY) accessors + if MDIO_BUS config MDIO_DEVRES diff --git a/drivers/net/mdio/Makefile b/drivers/net/mdio/Makefile index ea5390e2ef84..e8b739a3df1c 100644 --- a/drivers/net/mdio/Makefile +++ b/drivers/net/mdio/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 # Makefile for Linux MDIO bus drivers +obj-$(CONFIG_ACPI_MDIO) += acpi_mdio.o obj-$(CONFIG_FWNODE_MDIO) += fwnode_mdio.o obj-$(CONFIG_OF_MDIO) += of_mdio.o diff --git a/drivers/net/mdio/acpi_mdio.c b/drivers/net/mdio/acpi_mdio.c new file mode 100644 index 000000000000..60a86e3fc246 --- /dev/null +++ b/drivers/net/mdio/acpi_mdio.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ACPI helpers for the MDIO (Ethernet PHY) API + * + * This file provides helper functions for extracting PHY device information + * out of the ACPI ASL and using it to populate an mii_bus. + */ + +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Calvin Johnson "); +MODULE_LICENSE("GPL"); + +/** + * acpi_mdiobus_register - Register mii_bus and create PHYs from the ACPI ASL. + * @mdio: pointer to mii_bus structure + * @fwnode: pointer to fwnode of MDIO bus. + * + * This function registers the mii_bus structure and registers a phy_device + * for each child node of @fwnode. + */ +int acpi_mdiobus_register(struct mii_bus *mdio, struct fwnode_handle *fwnode) +{ + struct fwnode_handle *child; + u32 addr; + int ret; + + /* Mask out all PHYs from auto probing. */ + mdio->phy_mask = GENMASK(31, 0); + ret = mdiobus_register(mdio); + if (ret) + return ret; + + ACPI_COMPANION_SET(&mdio->dev, to_acpi_device_node(fwnode)); + + /* Loop over the child nodes and register a phy_device for each PHY */ + fwnode_for_each_child_node(fwnode, child) { + ret = acpi_get_local_address(ACPI_HANDLE_FWNODE(child), &addr); + if (ret || addr >= PHY_MAX_ADDR) + continue; + + ret = fwnode_mdiobus_register_phy(mdio, child, addr); + if (ret == -ENODEV) + dev_err(&mdio->dev, + "MDIO device at address %d is missing.\n", + addr); + } + return 0; +} +EXPORT_SYMBOL(acpi_mdiobus_register); diff --git a/include/linux/acpi_mdio.h b/include/linux/acpi_mdio.h new file mode 100644 index 000000000000..748d261fe2f9 --- /dev/null +++ b/include/linux/acpi_mdio.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * ACPI helper for the MDIO (Ethernet PHY) API + */ + +#ifndef __LINUX_ACPI_MDIO_H +#define __LINUX_ACPI_MDIO_H + +#include + +#if IS_ENABLED(CONFIG_ACPI_MDIO) +int acpi_mdiobus_register(struct mii_bus *mdio, struct fwnode_handle *fwnode); +#else /* CONFIG_ACPI_MDIO */ +static inline int acpi_mdiobus_register(struct mii_bus *mdio, struct fwnode_handle *fwnode) +{ + /* + * Fall back to mdiobus_register() function to register a bus. + * This way, we don't have to keep compat bits around in drivers. + */ + + return mdiobus_register(mdio); +} +#endif + +#endif /* __LINUX_ACPI_MDIO_H */