From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f43.google.com (mail-oo1-f43.google.com [209.85.161.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F7881DED42 for ; Sat, 15 Aug 2026 00:48:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786754919; cv=none; b=QavZpGNPE85BufUk3YDHOsmsnWqVcbrgigvf9LFEdvp1Wjx+mUi+/2s5aBk5Vhk8OfbmTEx+mDxEbeWLEfVscES1Hemw7OZVWrQInoNxvJl0HsaLelyTGDxvHbrSciLFTOpQKb08s8Mjo8/kqqDEYFTycEI1MjjzKOcQ3jSVUTs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786754919; c=relaxed/simple; bh=hHP58Dzogqq3qk/iH2DesTInIac5T9EHPwPG0TV9ehQ=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=gossEKQjLSW6rLvbQ35MqLlBkjBvPhUdfMhEIK5E7iiKmbxfZLcujrl1KvXpgygNr91lcuHrucwEwRo4kG8o3jCxrsfaMOATQSdWYgTvzWrPg1LKP/2zp6+tcnzfeOTQUmvGf5CP3PTtp6LJhDGN5cpcb3V+HzKRFy15oE1eiSw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=FpoyMGTb; arc=none smtp.client-ip=209.85.161.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FpoyMGTb" Received: by mail-oo1-f43.google.com with SMTP id 006d021491bc7-6ae9b721927so1095170eaf.0 for ; Fri, 14 Aug 2026 17:48:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786754916; x=1787359716; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:from:to:cc:subject:date:message-id :reply-to:content-type; bh=5qyi3VLCoapD+ocuJZoWd2FVKtPCQz8fzYPrWe0rNHc=; b=FpoyMGTbc/rQFApyNyBkxV4Ama8YEf0OCeMKiBwDCCdbdLcYmXi7CG5oS7WBuyugfi QAhGn31tgBpfASk2joJcTdvcuGUd4PztA/skuKXT2nOr7eSoCyxKgufkGYGaexuDzwSi gR0+Ahbajd8jhmXtcOsGrl4H92VAd8vruNcEz9B/OjxUc7FqOwVzg7+tLCu/ZbngafZP vebtTbzZzjPKPhsxqNVlWt7HDDC478E9E6jY3X9uJM3t6855VVTXYwL3M/mN0HcdsstL KWUnpW4r04umXrjVFTuwOz652blgCLVM3bMuyzYonpz9KgjI30hEKOsqxlZjOpay6uJX D+jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786754916; x=1787359716; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=5qyi3VLCoapD+ocuJZoWd2FVKtPCQz8fzYPrWe0rNHc=; b=YgguAa1NJWIAiyG4jT4mo0K3+HtO0zOQfGNlxmiWVl0NnJKmlQNvMMrsH32x/EI06c oksv/CMq7TJTrpgiRQMokmPVQkxfqJ0tAC1SyoisAWQ3qlyXAJ0EmX2l0LZlZeDJBGDn ZcH+2a6HFWv16LmLYKuYkdO/7xGNJwY22vlvU4g3LVibDk8/KONY1XSwv+eftksL9y+D gNtmwZh1XZBzBXSwnPFPOfy99/p+SrFxSoCrWIRzXfwXuAUjh3JsdSKo9b8oh7541RnG PMSriMIibDmI0RzrWQUq7EpS/49ybmTwlwRueYp1mbLlpWpBP39flcoudsnNJhUS79Mo JlVA== X-Forwarded-Encrypted: i=1; AHgh+RpYVnMUbRozlqowIsf12QbA5nnJrdp5WK5VsPdboV9k9BgL2xM/c5MuvW0NOh52EN/AJAD/91EPqhW/nEQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yy4CAgF0ICHhrH+pTyQmXLicEpddVDb8EknrjPD05T8B00e7r2H cmGWMWxJqsEx9vR802OtOEn6vaDvo+Nu5+KmtoF41h73wtTUJ5oBVISl X-Gm-Gg: AR+sD13lH2VkuBHx4Yrlmiszwrwk2EMyLcBq8RdWNELu5qqwcP/ADa7fegaqzkEXeYp Vew0keIjDyZm7wZHW0M/NxqZnipmgWSrVmiVgbFxV1HF3/9mLtC7+BIetEsiHDG3WFxRY8/9E6E JWJPtO6p+n7Jc6Sc6BejDihDeELRDksrg5mANCY6GvSJRfYtIeqJMqQ5ot28pQgNYKtjf6kHsNi Bdu2uICnFfoCE0OFoh08msGpnD5O+GSZ5GHM8GORsdK3M5gU6fg0fzvBN6509oUJUakU7rcevI2 Ra3Xg5NN8O34AbpWXAIgUJSzc03ByZbn6CvirrXJ7hetsDt5piC+vBapq/So7FzF1l18+xKBbLo Jwc1Jw4TQBt4wmDfyQbMEoNEve+G2H9WJHNsUaVNpFxH9JCdwJ6VdMvois9XyeKfEvQ4Gsb6Jfi tB2e8BTBUfFYbd4etGMbLJpuvASsQrLKNcaJF1ofBDqAwF1dUNZlTa9aXkIGRuYenBBoXxkIZ5u p4M9V2TmwvrGTDA0c8P0AJoVZqYz5Cg64sCIQYxwRDCFhoikziVvoGpbsTMrXqAgekR+wxIS3/d BRlBvOwHX947OJZ0XVOkyzuZaCqIqM+3qCCg7jVSSciVK6vahRy0ZbNqG6bQsD8+nDfvQ1IbFBR d54v+auGrreWdfEEK X-Received: by 2002:a05:6820:4def:b0:6ae:4d57:a5fe with SMTP id 006d021491bc7-6b0d6a8e814mr8699779eaf.20.1786754916100; Fri, 14 Aug 2026 17:48:36 -0700 (PDT) Received: from [127.0.1.1] (184-96-154-59.hlrn.qwest.net. [184.96.154.59]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-6b0d9574d7csm3240730eaf.2.2026.08.14.17.48.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Aug 2026 17:48:35 -0700 (PDT) From: James Hilliard Subject: [PATCH net-next 0/3] of: mdio: fix fw_devlink for Ethernet PHY packages Date: Fri, 14 Aug 2026 18:46:14 -0600 Message-Id: <20260814-submit-phy-package-fwdevlink-v1-v1-0-2319844f057a@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yWNQQ6CMBREr0L+2p8AKoJXMS5qmcoXLU1bK4Zwd 6suX2by3kIBXhDoWCzkkSTIZDNUm4L0oOwVLH1mqsu6Kdtqx+F5eUhkN7zZKT2q/DCvHukuduR U8aFRrelgsN92lC3Ow8j8K5zIIrLFHOn8X7LsBh2/AVrXDxRpqZqNAAAA X-Change-ID: 20260814-submit-phy-package-fwdevlink-v1-76a8f9efe539 To: Rob Herring , Saravana Kannan , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich , Andrew Lunn , Heiner Kallweit , Russell King , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Christian Marangi , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, netdev@vger.kernel.org, James Hilliard X-Mailer: b4 0.15.2 Ethernet PHY package nodes describe resources shared by their member PHYs, but the package node is a container rather than a struct device. fw_devlink therefore represents those dependencies with temporary sync-state-only links from the closest existing ancestor device to each supplier. For OF MDIO, that ancestor is the MDIO bus class device. The bus is driverless, so its proxy links never reach the usual driver-bound cleanup. They can remain after all member PHYs have probed and indefinitely prevent suppliers from receiving sync_state(). Fix both parts of the lifecycle. First, factor the sync-state-only cleanup already performed by device_links_driver_bound() and expose it to frameworks which populate children below driverless devices. Next, treat each enabled member PHY as a consumer of suppliers referenced by its package node. Finally, call the cleanup helper after successful OF MDIO population. The real links from each member PHY retain dependency and runtime-PM ordering. This was found while validating an X-Powers AC300 package whose input clock is supplied by PWM. Before the fix, the PWM driver reported that sync_state() was pending due to stmmac-0 even after the PHY had probed. The complete fix was tested on an Allwinner H616 board with an X-Powers AC300 PHY package. All five real supplier links targeted the member PHY, and no proxy link remained on the driverless MDIO bus. The PWM supplier reached state_synced while continuing to generate the PHY clock. The PHY negotiated a 100 Mbps full-duplex link, 8 MiB was transferred in each direction, and 100 consecutive pings completed without loss. Validation completed with: - arm64 defconfig object builds of driver core, OF property and OF MDIO with W=1; - strict per-patch checkpatch checks; and - the H616/AC300 hardware test described above. Assisted-by: Codex:gpt-5.6-sol Signed-off-by: James Hilliard --- James Hilliard (3): driver core: factor sync-state-only link cleanup of: property: link PHY package suppliers to member PHYs net: mdio: release fw_devlink proxies after population drivers/base/core.c | 74 +++++++++++++++++++++++++++++++++++----------- drivers/net/mdio/of_mdio.c | 5 +++- drivers/of/property.c | 14 +++++++++ include/linux/device.h | 1 + 4 files changed, 76 insertions(+), 18 deletions(-) --- base-commit: 3da8c3c8b8fa99505624b65ef590482f48e766b6 change-id: 20260814-submit-phy-package-fwdevlink-v1-76a8f9efe539 Best regards, -- James Hilliard