From patchwork Fri Jun 11 10:53:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ioana Ciornei X-Patchwork-Id: 12315339 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=-14.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HK_RANDOM_FROM,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 91808C48BE6 for ; Fri, 11 Jun 2021 10:55:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 793F1613EA for ; Fri, 11 Jun 2021 10:55:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231723AbhFKK5i (ORCPT ); Fri, 11 Jun 2021 06:57:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231651AbhFKK5a (ORCPT ); Fri, 11 Jun 2021 06:57:30 -0400 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E32DC0613A4; Fri, 11 Jun 2021 03:55:17 -0700 (PDT) Received: by mail-ej1-x632.google.com with SMTP id ho18so3901309ejc.8; Fri, 11 Jun 2021 03:55:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jIku+SUxsHEOSxoQcz7D5aJYws7YqOlKpfXAqwjLSzk=; b=Y265f3PSDjRMjK1R4E/1OKrg3C0lTTShbOBsyJfHPA52dJs6QEXAU+V7eJZqufE25p 4J8kAFaYAgxxYsIo2n6GfkbUWdYBht7a6WHxQSxel2Kb1BiEK1R/Q8MHch92b9deVBuX 0lJY5lC1CoN+YOEe/A7vwM5mB+7NEqg+HX8qYs94L68Gl61bqS1qefrN9BJncbhHg/tA YKCiiQh3FvGMCEWFNMn9CMSRGqGgWm7MM7VSzrRi6Nyz/nl1Gi1pBPE0IFy/nN5aNDgK S1YZJnAySfr+Iml8qbqW/m/Sh/CfzpNZjX2IFD9ONJXzJgQP9YaCtPM93ur46foBZF7u ikpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jIku+SUxsHEOSxoQcz7D5aJYws7YqOlKpfXAqwjLSzk=; b=klUZciSRMswK4zvPrXMUCpq8CFV0JvEVAnbKIViFxHIjpKiytem9XX8I1NEctTzoEN HQnnCP7BtbTTbJAJEUXE1XTyTJMYpDFfMEW8gAhw17Sge86f2v/eU+3TUh6PWG+Qc6Oc CVJpHpGtpzUOI2Os5/SR/nkjIMnTAaXM4VqpyoYzfpEZoJmXLTpNFY3J+kmELwgzdL8A LEsCV5rverxee7cfIdFLHBfSgXkWQvve10W65O0/fPNdvsny5KJ0s/zL83nqT/hHMAPN jswr8fFe+fR3qyrwp7ejzoDMlxcGQlDoK607KdzSGlWAXDaZt8TkJHJ7Ry+P6JP7AKJd IM9A== X-Gm-Message-State: AOAM532Uo/DUQxxul/Gab58ZMV9MUisZke3p+TgdCNDv3L9DWZnPJ3tT ojwgjHoMhzB3yerLliGiKSQ= X-Google-Smtp-Source: ABdhPJykvt6kbaDhPxoeEdGHmfH0CXOXH0YotRXOxh4e4HrJb+j91eQMZyFXTU7RzK1EON9GIpQuYg== X-Received: by 2002:a17:906:4e91:: with SMTP id v17mr3165296eju.119.1623408915592; Fri, 11 Jun 2021 03:55:15 -0700 (PDT) Received: from yoga-910.localhost ([188.26.52.84]) by smtp.gmail.com with ESMTPSA id r19sm2492051eds.75.2021.06.11.03.55.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Jun 2021 03:55:15 -0700 (PDT) From: Ioana Ciornei To: davem@davemloft.net, kuba@kernel.org, hkallweit1@gmail.com, netdev@vger.kernel.org, Grant Likely , "Rafael J . Wysocki" , Jeremy Linton , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Russell King - ARM Linux admin , Heikki Krogerus , Marcin Wojtas , Pieter Jansen Van Vuuren , Jon , Saravana Kannan , Randy Dunlap , calvin.johnson@oss.nxp.com Cc: Cristi Sovaiala , Florin Laurentiu Chiculita , Madalin Bucur , linux-arm-kernel@lists.infradead.org, Diana Madalina Craciun , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux.cj@gmail.com, Laurentiu Tudor , Len Brown , "Rafael J . Wysocki" , Ioana Ciornei Subject: [PATCH net-next v9 11/15] net: mdio: Add ACPI support code for mdio Date: Fri, 11 Jun 2021 13:53:57 +0300 Message-Id: <20210611105401.270673-12-ciorneiioana@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210611105401.270673-1-ciorneiioana@gmail.com> References: <20210611105401.270673-1-ciorneiioana@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Calvin Johnson Define acpi_mdiobus_register() to Register mii_bus and create PHYs for each ACPI child node. Signed-off-by: Calvin Johnson Signed-off-by: Ioana Ciornei Acked-by: Rafael J. Wysocki Acked-by: Grant Likely --- Changes in v9: - Add some more info about what is expected to be passed to acpi_mdiobus_register() as fwnode Changes in v8: None 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 | 58 ++++++++++++++++++++++++++++++++++++ include/linux/acpi_mdio.h | 26 ++++++++++++++++ 5 files changed, 93 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 e8f8b6c33a51..2172f594be8f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6811,6 +6811,7 @@ 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 422e9e042a3c..99a6c13a11af 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -34,6 +34,13 @@ 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 2e6813c709eb..15f8dc4042ce 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..d77c987fda9c --- /dev/null +++ b/drivers/net/mdio/acpi_mdio.c @@ -0,0 +1,58 @@ +// 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 fwnode is expected to represent + * an ACPI device object corresponding to the MDIO bus and its children are + * expected to correspond to the PHY devices on that 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..0a24ab7cb66f --- /dev/null +++ b/include/linux/acpi_mdio.h @@ -0,0 +1,26 @@ +/* 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 */