From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f46.google.com (mail-wr1-f46.google.com [209.85.221.46]) (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 2F14C337689 for ; Thu, 29 Jan 2026 10:16:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.46 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769681782; cv=none; b=Jm0Qz0ROfw37VYsjD2hzdQPmcRWtAeWcungndtrszuXXL6eZLBzwp2junZjM1rMcgElbANyDT+MIK63YiRztQUsiu4l/OMWn8kJgw9HSDNw1x5uc7HpZvjOBuo9Ywsw5mryNJ2q2IQUwwkugTy27HY3aOLC4ZYstNg9oHhAq8cM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769681782; c=relaxed/simple; bh=8k8ot+AK7quELQCYAe1BT4CubsLLtkDchKFjzCCedWc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=h4Xy97rK+YDl74JyG6ByNf/ba7dscnx7pPtBnhX38FeSycd7FchUOg3UP/qZkOhlt9m5R6B1FbyeuuTmGj2nse7w6kLL5rKipOEKhZGgbyKFHITcnZu8MmlqjK4gmSz2cWO9XsmOqcJ077GP6ZfFOuxRVx3O7Lrud7RtRzqIugI= 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=GVVErEcU; arc=none smtp.client-ip=209.85.221.46 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="GVVErEcU" Received: by mail-wr1-f46.google.com with SMTP id ffacd0b85a97d-432d256c2e6so761247f8f.3 for ; Thu, 29 Jan 2026 02:16:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1769681779; x=1770286579; 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=15APCKiIxeuqVDfA7ICGOpjXKLO10lGgKVaUkFEEdI8=; b=GVVErEcUoVfv6wQuZ2OnJpUFd2917emmDMlWvwxxwX+wLP3H5AhrYAeUYgbWzPO39f ygtLdrYQMkxrc4eGcndP078OnLCcIW9Yk/Z+DRKMIwkhmkfI1OCtxb26mhNSiKhlTEL5 A9QhM76ggwEOsnYOKrSyIxsc9nAsx3L3bvUITflgAoijT/KyBvfynYl8HJ/wvZW+cfj+ JfK33VJTWAxOsGUzWRsXAubh0577aOL+oh3wACPLn4isteScKvDVoYiJlx7bQ7vWf69V p2ExQTKPlaWt4Q3gYFMpBplnXvtjRCJ+P/9cWo1ooufObch1SseEkBc0UoHeZfp47SBQ bjVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769681779; x=1770286579; 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=15APCKiIxeuqVDfA7ICGOpjXKLO10lGgKVaUkFEEdI8=; b=u+PRa1lNSmNJqoAOUEcz3a9V2+clPejTSmS6KIlPzrNBv9ffo6sf3OScrgbAqESbCZ d2t+kYIb7E61ydvqSM8+zUPkRG7efkR3xkDinKEI6S2Hucqbh7I0FN6+khK9TGnDNRGY YGnJ1Sh/BdfcqUqaqTR5LBr9bttQJ5fWI3HW67POVzJd/eMowNTZdC7tKeuVaHLKx/1b ECQPnocTCLOvK8I+Vd04pM8IDIxqg9Ba/DElWuTKjZ8/UrBSnVK+Pc7N9M5cXsGfOsV7 DVRZcad6MWxknXzhU4z7fTlYBHQCuYOWxKqMD8A3XZHVtCH6rTdJ/0DBQR/qP1mdsvIx eZdQ== X-Forwarded-Encrypted: i=1; AJvYcCVgv439flSB4OY2akmglr9Ju0P6V6Ew7njpEccJuA5OXYBeBvviF+ST+EBbDIIDLaBr5IwX28JA0CW2@vger.kernel.org X-Gm-Message-State: AOJu0YxwKAMQBgQH8OgiuuJS0/+02YfXe9AsECKchklbu8aqVkLHTf+p XjcdPUXKHJDMYoEOdAT+40174gjzSkZtxPG17XG75TohWfUWRwu4OOvy X-Gm-Gg: AZuq6aIztVc2gRH9+HuAz16sp3hJUG1wcDVlkLvkN7GtAI7socaFJ2cJbD1XPpPJ6K5 BVAFtpsceBIabnbFh12tdG4EXc3hhwZkFE8wXUtV0I5Ypu4D8g4sOK2pbZdfw6TjjTMJyIjX5Ei 1ZYlPrXcDASGG/v6z+QvTHwPsm8INnFRtLmjZ0VqthF695JIiD02p77LH4oCP0uGt98h7Np3kq1 dB0i33WpeVG6HIfufaiG64/RZu4/ls3b4Sl951tXd+UXU3t8mSexWQrDFyCoRFk6ssLodbpCdcr Okrd8IBy2SaDS26BjHfEhqNGRTOtlJEaWrkgifv6NjQYjerI311fvT1LV2A/oJ1mrjp88DPpn/K 9OpYITRp7XuHyoxZNqSWrDMdZOGSsr/DdJrxGSJOIK/zFS99DdgV9iigTXfPGqwwOzfjL2v0TMe BzfqWpFTkHjvY= X-Received: by 2002:a05:6000:2012:b0:435:bd00:cb4 with SMTP id ffacd0b85a97d-435dd0737c6mr11799323f8f.23.1769681779368; Thu, 29 Jan 2026 02:16:19 -0800 (PST) Received: from nas.local ([2001:912:1ac0:1e00:c662:37ff:fe09:93df]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-435e132303fsm13413662f8f.36.2026.01.29.02.16.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jan 2026 02:16:19 -0800 (PST) From: Damien Dejean To: andrew@lunn.ch, krzk+dt@kernel.org, robh@kernel.org, kuba@kernel.org Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, edumazet@google.com, davem@davemloft.net, pabeni@redhat.com, hkallweit1@gmail.com, Damien Dejean Subject: [PATCH v4 2/4] net: phy: realtek: add RTL8224 pair order support Date: Thu, 29 Jan 2026 11:16:04 +0100 Message-ID: <20260129101606.33972-2-dam.dejean@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260129101606.33972-1-dam.dejean@gmail.com> References: <20260129101606.33972-1-dam.dejean@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The RTL8224 has a register to configure a pair swap (from ABCD order to DCBA) providing PCB designers more flexbility when wiring the chip. The swap parameter has to be set correctly for each of the 4 ports before the chip can detect a link. After a reset, this register is (unfortunately) left in a random state, thus it has to be initialized. On most of the devices the bootloader does it once for all and we can rely on the value set, on some other it is not and the kernel has to do it. The MDI pair swap can be set in the device tree using the property enet-phy-lane-order. The property is set to 0 to keep the default order (ABCD), or 1 to reverse the pairs (DCBA). Signed-off-by: Damien Dejean --- drivers/net/phy/realtek/Kconfig | 1 + drivers/net/phy/realtek/realtek_main.c | 49 ++++++++++++++++++++++++++ 2 files changed, 50 insertions(+) diff --git a/drivers/net/phy/realtek/Kconfig b/drivers/net/phy/realtek/Kconfig index b05c2a1e9024..a741b34d193e 100644 --- a/drivers/net/phy/realtek/Kconfig +++ b/drivers/net/phy/realtek/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only config REALTEK_PHY tristate "Realtek PHYs" + select PHY_PACKAGE help Currently supports RTL821x/RTL822x and fast ethernet PHYs diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c index 75565fbdbf6d..79c2762b610e 100644 --- a/drivers/net/phy/realtek/realtek_main.c +++ b/drivers/net/phy/realtek/realtek_main.c @@ -171,6 +171,8 @@ #define RTL8224_SRAM_RTCT_LEN(pair) (0x8028 + (pair) * 4) +#define RTL8224_VND1_MDI_PAIR_SWAP 0xa90 + #define RTL8366RB_POWER_SAVE 0x15 #define RTL8366RB_POWER_SAVE_ON BIT(12) @@ -1820,6 +1822,51 @@ static int rtl8224_cable_test_get_status(struct phy_device *phydev, bool *finish return rtl8224_cable_test_report(phydev, finished); } +static int rtl8224_mdi_config_order(struct phy_device *phydev) +{ + struct device_node *np = phydev->mdio.dev.of_node; + u8 port_offset = phydev->mdio.addr & 3; + u32 order = 0; + int ret, val; + + ret = of_property_read_u32(np, "enet-phy-lane-order", &order); + + /* Do nothing in case the property is not present */ + if (ret == -EINVAL) + return 0; + + if (ret) + return ret; + + if (order & ~1) + return -EINVAL; + + val = __phy_package_read_mmd(phydev, 0, MDIO_MMD_VEND1, + RTL8224_VND1_MDI_PAIR_SWAP); + if (val < 0) + return val; + + if (order) + val |= (1 << port_offset); + else + val &= ~(1 << port_offset); + + return __phy_package_write_mmd(phydev, 0, MDIO_MMD_VEND1, + RTL8224_VND1_MDI_PAIR_SWAP, val); +} + +static int rtl8224_config_init(struct phy_device *phydev) +{ + return rtl8224_mdi_config_order(phydev); +} + +static int rtl8224_probe(struct phy_device *phydev) +{ + /* Chip exposes 4 ports, join all of them in the same package */ + return devm_phy_package_join(&phydev->mdio.dev, phydev, + phydev->mdio.addr & ~3, 0); +} + static bool rtlgen_supports_2_5gbps(struct phy_device *phydev) { int val; @@ -2392,6 +2439,8 @@ static struct phy_driver realtek_drvs[] = { PHY_ID_MATCH_EXACT(0x001ccad0), .name = "RTL8224 2.5Gbps PHY", .flags = PHY_POLL_CABLE_TEST, + .probe = rtl8224_probe, + .config_init = rtl8224_config_init, .get_features = rtl822x_c45_get_features, .config_aneg = rtl822x_c45_config_aneg, .read_status = rtl822x_c45_read_status, -- 2.47.3