From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f48.google.com (mail-wr1-f48.google.com [209.85.221.48]) (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 2AD773783AC for ; Tue, 24 Mar 2026 19:06:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774379203; cv=none; b=hSaitmMdoNfA+eEKdgzwz8sH8pV3PfimrDp2PzrftkglJtUxrMcsKiSE+ZQFdiCUMZ0/dcsG/41MygDAUcvAe63TGVPG4Uue8Pn9eG5yf1MMo6yif74MjijcE9xfeBS/5uKgaFbqK7WaUIEW3BIXE/VdnZfMyWxPA9hQlnTsMx8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774379203; c=relaxed/simple; bh=5GDKSSP8pB5qaJNDZS96MivX8NZANRKUOJJCkZA0mMg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Kn7Q5fKoRayIXMYxX4Tx2WaDZc3Zh2gYbGTl8InZ+OBw/tIgujppu6u1yt19p/AI5uSZZlDjU4CnDeGVpox3ac9ggcMm2SU7+WuQ9aMPWiql0aBLV/dNaFMD4nAeNOYzNRLOLmEBjADX/YdiILqzU0XI9l6Y2M7lSzChJQKMZHQ= 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=hPav99De; arc=none smtp.client-ip=209.85.221.48 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="hPav99De" Received: by mail-wr1-f48.google.com with SMTP id ffacd0b85a97d-439b6d9c981so111259f8f.1 for ; Tue, 24 Mar 2026 12:06:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1774379200; x=1774984000; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=x2oqbOVBQMg4GotjWppJzcaNGyfKsWk7lWEpLVMBJAU=; b=hPav99DeZVNaj62lpMxvq1cO/CK16H+xx8bRYBkuinRz9VvYULkytLfM0R4SjW2o54 mTuis6WwkVqZqhUs3O9LsvUmauEsYmuiJg/R00htNnUdfP63jlb1entJhgrIktBMUKqK HP8la7xd7GIGY/r1+Jb7xgIDHxZYGaT5UqkrQFBRmg/YbUHrA+GfYde5GcO358HX+Snr QtAuGeAu3WOvsvZfgDYhw5PF+DamjYdPN7rye0YQSyYLdL9T2fsgJlPgb1B04dgoK7pq DYc3IKFggUZtEPVFiqqaD6fDxC8t9i71cYN1haNJuV2gLZBN11FGTixZjaNNHbgGWtdv b8GA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774379200; x=1774984000; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=x2oqbOVBQMg4GotjWppJzcaNGyfKsWk7lWEpLVMBJAU=; b=I1Tgi0gqkbf28YCGtBMNhkrEWN6jUs0OdThrszBruAVeqxLzLwf/G39AB97Y930r// +OC2qq4v5Fi1YJqAURB91BW/K76BqJdfq+tHvUUOF7xVjFkQxZzOJKnkbmEjyZ1T6ONQ XIjMT1UE84jJr5P03r1jKn7p6T3CYT3CCdpIkvFIYRnLH/+XVH24HhRaFbhAO1InSmNV 9bwsp5bFhhuxF5AwxQzUh9vWmEfwKYic1ygXbrosvuRf0Hwuoq1Nc0l6is3GEl1M9N3c TzkT+OkRAJz04/hQwPcv8/gDGqOlHccGtQujvAnr6wKi3DlEi+VY5dcw+J/nmfFtY9OG jdnw== X-Gm-Message-State: AOJu0YyyYWk0dd46KNP/AiQOH7ZTarmjC66wCc53Y4BuavZN1Ugl9/Q0 IqNtVZwqrWZy44fJEJCWEeNNwNU+2i1TGv9GY6Q3n5UgGB+h6OG9PSX2wxhsiw== X-Gm-Gg: ATEYQzySgQtDwitNYLxZ9Eyi+6TIH1vqAzcodC3Q6NAbeSqsI7nhi+fil+/vujHSGEl Pk2RUmobDTndqsYVJYcR21v8ATKOVYBXBLn/o5jtoJwqCtNmXAc2oztInCec8UIW2BAiHwlm3l4 ZR+e/CAuAszYhQWbF7PgAEOLAsbJTymiu9LoF932Q8oPl+vQY77+0Ix0XxfCoT57eiTlYgcxB3A VsH5xNg9RMyQ56OB0nU+aKUxVo3xIrD7AfmOo5RbwuBHhll53meRDqIQUPHEwMhXe+1s3buBdRe pWNQM/n4Y65loQg54ba0ZRrC/tX9wvQdVVLGfRv2n8Kup4w2tXTFOG8/4S2LvrBj7xgbKx8XkUi IDR2nYRGsM696sDMdrce0BwMuCf0M58yp0tVlb88cFbbwxgqnef3JIpOZGS2dHKfdnEBaBmQeFh VdSRmwIRkXUSp/Q/gq43254BHHYDBJ0Z259s+F3ZegTdcWWA2PnNm7Xgz8lkJ4sacdV/VeI9Yif iOmv8L6iCYDy+ZV X-Received: by 2002:a05:6000:3c5:b0:439:c153:ae3d with SMTP id ffacd0b85a97d-43b805265e9mr6436648f8f.6.1774379200248; Tue, 24 Mar 2026 12:06:40 -0700 (PDT) Received: from 6850u.ox.dtw.sh (cpc69060-oxfd26-2-0-cust335.4-3.cable.virginm.net. [82.6.49.80]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b64714decsm35985435f8f.31.2026.03.24.12.06.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Mar 2026 12:06:39 -0700 (PDT) From: Daniel Wagner To: netdev@vger.kernel.org Cc: Florian Fainelli , Andrew Lunn , Heiner Kallweit , Russell King , bcm-kernel-feedback-list@broadcom.com, Jakub Kicinski , Eric Dumazet , Paolo Abeni , Daniel Wagner Subject: [PATCH net-next v2] net: phy: bcm84881: add BCM84891/BCM84892 support Date: Tue, 24 Mar 2026 19:06:01 +0000 Message-ID: <20260324190601.1616343-1-wagner.daniel.t@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260324152503.1522071-2-wagner.daniel.t@gmail.com> References: <20260324152503.1522071-2-wagner.daniel.t@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The BCM84891 and BCM84892 are 10GBASE-T PHYs in the same family as the BCM84881, sharing the register map and most callbacks. They add USXGMII as a host interface mode. bcm8489x_config_init() is separate from bcm84881_config_init(): it allows only USXGMII (the only host mode available on the tested hardware) and clears MDIO_CTRL1_LPOWER, which is set at boot on the tested platform. Does not recur on ifdown/ifup, cable events, or link-partner advertisement changes, so config_init is sufficient. For USXGMII, read_status() skips the 0x4011 host-mode register: it returns the same value regardless of negotiated copper speed (USXGMII symbol replication). Speed comes from phy_resolve_aneg_linkmode() via standard C45 AN resolution. Tested on TRENDnet TEG-S750 (RTL9303 + 1x BCM84891 + 4x BCM84892) running OpenWrt, where the MDIO controller driver is currently OpenWrt-specific. Link verified at 100M, 1G, 2.5G, 10G. Signed-off-by: Daniel Wagner --- Changes in v2: - Separate bcm8489x_config_init() that allows only USXGMII. v1 also allowed USXGMII for BCM84881 (which doesn't support it), and put SGMII/2500BASEX/10GBASER in the 8489x possible_interfaces which I can't substantiate on this hardware. (Russell) - LPOWER clear moved from config_aneg to config_init. Characterized on hardware: boot-time only, does not recur on ifdown/ifup, cable events, or link-partner advertisement changes. (Russell) - Dropped LED support; will figure out the PHY LED framework approach for bicolor speed-mapped LEDs as a follow-up. (Russell, Andrew) - PHY_ID_MATCH_MODEL(). (Russell, Andrew) - is_bcm8489x() helper removed; the interface mode now suffices as a discriminator in read_status since only the 8489x config_init allows USXGMII. v1: https://lore.kernel.org/netdev/20260324152503.1522071-2-wagner.daniel.t@gmail.com/ drivers/net/phy/bcm84881.c | 48 +++++++++++++++++++++++++++++++++++++- 1 file changed, 47 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/bcm84881.c b/drivers/net/phy/bcm84881.c index d7f7cc44c5..f114212dd3 100644 --- a/drivers/net/phy/bcm84881.c +++ b/drivers/net/phy/bcm84881.c @@ -54,6 +54,21 @@ static int bcm84881_config_init(struct phy_device *phydev) return 0; } +static int bcm8489x_config_init(struct phy_device *phydev) +{ + __set_bit(PHY_INTERFACE_MODE_USXGMII, phydev->possible_interfaces); + + if (phydev->interface != PHY_INTERFACE_MODE_USXGMII) + return -ENODEV; + + /* MDIO_CTRL1_LPOWER is set at boot on the tested platform. Does not + * recur on ifdown/ifup, cable events, or link-partner advertisement + * changes; clear it once. + */ + return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, + MDIO_CTRL1_LPOWER); +} + static int bcm84881_probe(struct phy_device *phydev) { /* This driver requires PMAPMD and AN blocks */ @@ -201,6 +216,15 @@ static int bcm84881_read_status(struct phy_device *phydev) return 0; } + /* BCM84891/92 on USXGMII: the host interface mode doesn't change + * with copper speed (USXGMII symbol replication; the MAC receives + * the negotiated copper speed, not 10G, so no rate adaptation). + * Skip 0x4011; phy_resolve_aneg_linkmode() above already set the + * speed. Only bcm8489x_config_init() allows USXGMII. + */ + if (phydev->interface == PHY_INTERFACE_MODE_USXGMII) + return genphy_c45_read_mdix(phydev); + /* Set the host link mode - we set the phy interface mode and * the speed according to this register so that downshift works. * We leave the duplex setting as per the resolution from the @@ -256,6 +280,26 @@ static struct phy_driver bcm84881_drivers[] = { .config_aneg = bcm84881_config_aneg, .aneg_done = bcm84881_aneg_done, .read_status = bcm84881_read_status, + }, { + PHY_ID_MATCH_MODEL(0x35905080), + .name = "Broadcom BCM84891", + .inband_caps = bcm84881_inband_caps, + .config_init = bcm8489x_config_init, + .probe = bcm84881_probe, + .get_features = bcm84881_get_features, + .config_aneg = bcm84881_config_aneg, + .aneg_done = bcm84881_aneg_done, + .read_status = bcm84881_read_status, + }, { + PHY_ID_MATCH_MODEL(0x359050a0), + .name = "Broadcom BCM84892", + .inband_caps = bcm84881_inband_caps, + .config_init = bcm8489x_config_init, + .probe = bcm84881_probe, + .get_features = bcm84881_get_features, + .config_aneg = bcm84881_config_aneg, + .aneg_done = bcm84881_aneg_done, + .read_status = bcm84881_read_status, }, }; @@ -264,9 +308,11 @@ module_phy_driver(bcm84881_drivers); /* FIXME: module auto-loading for Clause 45 PHYs seems non-functional */ static const struct mdio_device_id __maybe_unused bcm84881_tbl[] = { { 0xae025150, 0xfffffff0 }, + { PHY_ID_MATCH_MODEL(0x35905080) }, + { PHY_ID_MATCH_MODEL(0x359050a0) }, { }, }; MODULE_AUTHOR("Russell King"); -MODULE_DESCRIPTION("Broadcom BCM84881 PHY driver"); +MODULE_DESCRIPTION("Broadcom BCM84881/BCM84891/BCM84892 PHY driver"); MODULE_DEVICE_TABLE(mdio, bcm84881_tbl); MODULE_LICENSE("GPL"); -- 2.47.3