From nobody Sat Nov 30 03:31:13 2024 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 AF1AE1D6C62 for ; Fri, 13 Sep 2024 08:40:53 +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=1726216855; cv=none; b=DW9hMjcAAyfOXydPeWLLjvbTq596c2QXKSZ7JV6AJ7hzugtApKHr8uKSqG8825O1VyPGLVvNDWMn+TOAedcZG3jChjBDrHeO2ayd5V+i8DbSoJLYhebiXViY8kEBV4Emk4pDCQKKZDQz0X2Nk9FoM91IGg5AainD1yS5pXCdddI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726216855; c=relaxed/simple; bh=laoe3SnMaiPWtPOUgZ8i4FpD13PW4kdI6pvhyusMybw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cIzB1J9xUCnsNjVHH6tvzGcNwyX4pcjqz/bMvZ5h2tctfEPkf1Ej6NrF7petPzmXHbSlJwlIj3NL1OqLwAnKolQdpZPXBVUUeXw0p3x6NyzWxMlOpsaWKLB/D4fBU0hR8ywgA1QuETcFNgCyWXaS0uN7itEYAi8rc3q9YMNP0dg= 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 1sp1qr-0005nB-L3; Fri, 13 Sep 2024 10:40:25 +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 1sp1qp-007a7Z-TJ; Fri, 13 Sep 2024 10:40:23 +0200 Received: from ore by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1sp1qp-00E1uc-2g; Fri, 13 Sep 2024 10:40:23 +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 v3 2/2] net: phy: Add support for PHY timing-role configuration via device tree Date: Fri, 13 Sep 2024 10:40:22 +0200 Message-Id: <20240913084022.3343903-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240913084022.3343903-1-o.rempel@pengutronix.de> References: <20240913084022.3343903-1-o.rempel@pengutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Introduce support for configuring the master/slave role of PHYs based on the `timing-role` 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. Signed-off-by: Oleksij Rempel Reviewed-by: Russell King (Oracle) --- changes v3: - rename master-slave to timing-role --- drivers/net/phy/phy-core.c | 33 +++++++++++++++++++++++++++++++++ drivers/net/phy/phy_device.c | 3 +++ include/linux/phy.h | 1 + 3 files changed, 37 insertions(+) diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index 1f98b6a96c153..97ff10e226180 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -412,6 +412,39 @@ void of_set_phy_eee_broken(struct phy_device *phydev) phydev->eee_broken_modes =3D broken; } =20 +/** + * of_set_phy_timing_role - 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_timing_role(struct phy_device *phydev) +{ + struct device_node *node =3D phydev->mdio.dev.of_node; + const char *master; + + if (!IS_ENABLED(CONFIG_OF_MDIO)) + return; + + if (!node) + return; + + if (of_property_read_string(node, "timing-role", &master)) + return; + + if (strcmp(master, "force-master") =3D=3D 0) + phydev->master_slave_set =3D MASTER_SLAVE_CFG_MASTER_FORCE; + else if (strcmp(master, "force-slave") =3D=3D 0) + phydev->master_slave_set =3D MASTER_SLAVE_CFG_SLAVE_FORCE; + else if (strcmp(master, "prefer-master") =3D=3D 0) + phydev->master_slave_set =3D MASTER_SLAVE_CFG_MASTER_PREFERRED; + else if (strcmp(master, "prefer-slave") =3D=3D 0) + phydev->master_slave_set =3D MASTER_SLAVE_CFG_SLAVE_PREFERRED; + 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..4ccf504a8b2c2 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); =20 + /* Get master/slave strap overrides */ + of_set_phy_timing_role(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..898ea2e316d2c 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_timing_role(struct phy_device *phydev); int phy_speed_down_core(struct phy_device *phydev); =20 /** --=20 2.39.2