From patchwork Mon Sep 9 12:43:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oleksij Rempel X-Patchwork-Id: 13796949 X-Patchwork-Delegate: kuba@kernel.org Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94DF21B86F0 for ; Mon, 9 Sep 2024 12:44:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725885844; cv=none; b=ltVNoWcapSC7qHcijOZOOShXqFvXxwKuoVRt1OeTR9kUhu5tFbbWRf1pkHR/sPXdoT4n04oLvoAtgKLGx/SqaZtFYKHO2KHlVX+pb046tRXmCEOQnfLfvLJYEpXHACi+zTZ60CX+tQYUGUMfcbdr/JiKFY/LdYBvjuzyxdmxRcs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725885844; c=relaxed/simple; bh=6TIlMKWOEczN3Lsa1rteTXtZ5HxrJ9bSPNFperJGaCw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=MPYoH5smvejf79D65HkdEbXce9f5oqhpVWcet/Dx+1uU7Y7z9/TLXKkRebOLpsaXWR/jGfS+doGoBJL8DBdx6ZJokQBd3N1igPTUH/IjJ2QTrK+0jRD4M3tXfF7jSF8ubfiAK3rltu43pXORqfMymRNnerDM8Lk2mls7TzIf1qs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sndk8-0001rF-Jw; Mon, 09 Sep 2024 14:43:44 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sndk6-006elN-Qm; Mon, 09 Sep 2024 14:43:42 +0200 Received: from ore by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1sndk6-00BuN8-2S; Mon, 09 Sep 2024 14:43:42 +0200 From: Oleksij Rempel To: Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli Cc: Oleksij Rempel , kernel@pengutronix.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Russell King , devicetree@vger.kernel.org Subject: [PATCH net-next v2 2/2] net: phy: Add support for master-slave role configuration via device tree Date: Mon, 9 Sep 2024 14:43:41 +0200 Message-Id: <20240909124342.2838263-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240909124342.2838263-1-o.rempel@pengutronix.de> References: <20240909124342.2838263-1-o.rempel@pengutronix.de> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Introduce support for configuring the master/slave role of PHYs based on the `master-slave` property in the device tree. While this functionality is necessary for Single Pair Ethernet (SPE) PHYs (1000/100/10Base-T1) where hardware strap pins may be unavailable or incorrectly set, it works for any PHY type. The property supports `forced-master` and `forced-slave` values, allowing for predefined link role assignment. Signed-off-by: Oleksij Rempel --- drivers/net/phy/phy-core.c | 29 +++++++++++++++++++++++++++++ drivers/net/phy/phy_device.c | 3 +++ include/linux/phy.h | 1 + 3 files changed, 33 insertions(+) diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index 1f98b6a96c153..296c446037144 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -412,6 +412,35 @@ void of_set_phy_eee_broken(struct phy_device *phydev) phydev->eee_broken_modes = broken; } +/** + * of_set_phy_master_slave - Set the master/slave mode of the PHY + * + * @phydev: The phy_device struct + * + * Set master/slave configuration of the PHY based on the device tree. + */ +void of_set_phy_master_slave(struct phy_device *phydev) +{ + struct device_node *node = phydev->mdio.dev.of_node; + const char *master; + + if (!IS_ENABLED(CONFIG_OF_MDIO)) + return; + + if (!node) + return; + + if (of_property_read_string(node, "master-slave", &master)) + return; + + if (strcmp(master, "forced-master") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_MASTER_FORCE; + else if (strcmp(master, "forced-slave") == 0) + phydev->master_slave_set = MASTER_SLAVE_CFG_SLAVE_FORCE; + else + phydev_warn(phydev, "Unknown master-slave mode %s\n", master); +} + /** * phy_resolve_aneg_pause - Determine pause autoneg results * diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 560e338b307a4..8304f2781d5ae 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -3608,6 +3608,9 @@ static int phy_probe(struct device *dev) */ of_set_phy_eee_broken(phydev); + /* Get master/slave strap overrides */ + of_set_phy_master_slave(phydev); + /* The Pause Frame bits indicate that the PHY can support passing * pause frames. During autonegotiation, the PHYs will determine if * they should allow pause frames to pass. The MAC driver should then diff --git a/include/linux/phy.h b/include/linux/phy.h index 4a9a11749c554..81701bdac44c1 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1260,6 +1260,7 @@ size_t phy_speeds(unsigned int *speeds, size_t size, unsigned long *mask); void of_set_phy_supported(struct phy_device *phydev); void of_set_phy_eee_broken(struct phy_device *phydev); +void of_set_phy_master_slave(struct phy_device *phydev); int phy_speed_down_core(struct phy_device *phydev); /**