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[93.34.89.13]) by smtp.googlemail.com with ESMTPSA id j33-20020a05600c1c2100b0040772934b12sm18205846wms.7.2023.11.20.05.51.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Nov 2023 05:51:24 -0800 (PST) From: Christian Marangi To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andy Gross , Bjorn Andersson , Konrad Dybcio , Andrew Lunn , Heiner Kallweit , Russell King , Florian Fainelli , Broadcom internal kernel review list , Daniel Golle , Qingfang Deng , SkyLake Huang , Matthias Brugger , AngeloGioacchino Del Regno , David Epping , Vladimir Oltean , Christian Marangi , "Russell King (Oracle)" , Harini Katakam , Simon Horman , Robert Marko , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [net-next RFC PATCH 08/14] net: phy: add support for PHY package interface mode Date: Mon, 20 Nov 2023 14:50:35 +0100 Message-Id: <20231120135041.15259-9-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231120135041.15259-1-ansuelsmth@gmail.com> References: <20231120135041.15259-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Some PHY in PHY package supports running only at a specific mode for each PHY in the package. Add support for enforcing this special thing a verify consistency with the requested mode to prevent misconfiguration. To set the PHY package mode, simply set "phy-mode" in the phy-package node. Each PHY on init will verify if the requested mode match the one set for the PHY package and will return -EINVAL if this is not true. If PHY package doesn't specify any mode, it's assumed that PHY in the package doesn't have such limitation. Signed-off-by: Christian Marangi --- drivers/net/phy/phy_device.c | 37 ++++++++++++++++++++++++++++++++++++ include/linux/phy.h | 6 ++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 0b7ba6995929..73af4197a7af 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -1225,8 +1226,17 @@ static int phy_poll_reset(struct phy_device *phydev) int phy_init_hw(struct phy_device *phydev) { + phy_interface_t package_interface; int ret = 0; + /* Validate we are requesting consistent mode if we + * are in a PHY package and the PHY package requires a + * specific mode. + */ + ret = phy_package_get_mode(phydev, &package_interface); + if (!ret && phydev->interface != package_interface) + return -EINVAL; + /* Deassert the reset signal */ phy_device_reset(phydev, 0); @@ -1776,6 +1786,32 @@ void phy_package_leave(struct phy_device *phydev) } EXPORT_SYMBOL_GPL(phy_package_leave); +/** + * phy_package_get_mode - get PHY interface mode for PHY package + * @phydev: target phy_device struct + * @interface: phy_interface_t pointer where to save the PHY package mode + * + * Gets PHY interface mode for the shared data of the PHY package. + * Returns 0 and updates @interface with the PHY package value, or -ENODEV + * if PHY is not in PHY package or -EINVAL if a PHY package interface mode + * is not set. + */ +int phy_package_get_mode(struct phy_device *phydev, phy_interface_t *interface) +{ + struct phy_package_shared *shared = phydev->shared; + + if (!shared) + return -ENODEV; + + if (shared->package_interface == PHY_INTERFACE_MODE_NA) + return -EINVAL; + + *interface = shared->package_interface; + + return 0; +} +EXPORT_SYMBOL_GPL(phy_package_get_mode); + static void devm_phy_package_leave(struct device *dev, void *res) { phy_package_leave(*(struct phy_device **)res); @@ -3270,6 +3306,7 @@ static int of_phy_package(struct phy_device *phydev) goto exit; phydev->shared->np = package_node; + of_get_phy_mode(package_node, &phydev->shared->package_interface); exit: kfree(global_phy_addrs); diff --git a/include/linux/phy.h b/include/linux/phy.h index 1849fc637196..8af0a8a72b88 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -341,6 +341,11 @@ struct mdio_bus_stats { struct phy_package_shared { /* With PHY package defined in DT this points to the PHY package node */ struct device_node *np; + /* PHY package interface + * If defined, each PHY of the package MUST have the interface + * set to the PHY package. + */ + phy_interface_t package_interface; /* addrs list pointer */ /* note that this pointer is shared between different phydevs. * It is allocated and freed automatically by phy_package_join() and @@ -2014,6 +2019,7 @@ int phy_ethtool_nway_reset(struct net_device *ndev); int phy_package_join(struct phy_device *phydev, int *addrs, size_t addrs_num, size_t priv_size); void phy_package_leave(struct phy_device *phydev); +int phy_package_get_mode(struct phy_device *phydev, phy_interface_t *interface); int devm_phy_package_join(struct device *dev, struct phy_device *phydev, int *addrs, size_t addrs_num, size_t priv_size);