Define fwnode_phy_find_device() to iterate an mdiobus and find the phy device of the provided phy fwnode. Additionally define device_phy_find_device() to find phy device of provided device.
Define fwnode_get_phy_node() to get phy_node using named reference. Signed-off-by: Calvin Johnson <calvin.john...@oss.nxp.com> --- Changes in v3: move fwnode APIs to appropriate place stubs fwnode APIs for !CONFIG_PHYLIB improve comment on function return condition. Changes in v2: move phy code from base/property.c to net/phy/phy_device.c replace acpi & of code to get phy-handle with fwnode_find_reference drivers/net/phy/phy_device.c | 53 ++++++++++++++++++++++++++++++++++++ include/linux/phy.h | 19 +++++++++++++ 2 files changed, 72 insertions(+) diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 7e1ddd5745d2..3e8224132218 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -31,6 +31,7 @@ #include <linux/mdio.h> #include <linux/io.h> #include <linux/uaccess.h> +#include <linux/property.h> MODULE_DESCRIPTION("PHY library"); MODULE_AUTHOR("Andy Fleming"); @@ -2436,6 +2437,58 @@ static bool phy_drv_supports_irq(struct phy_driver *phydrv) return phydrv->config_intr && phydrv->ack_interrupt; } +/** + * fwnode_phy_find_device - Find phy_device on the mdiobus for the provided + * phy_fwnode. + * @phy_fwnode: Pointer to the phy's fwnode. + * + * If successful, returns a pointer to the phy_device with the embedded + * struct device refcount incremented by one, or NULL on failure. + */ +struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode) +{ + struct device *d; + struct mdio_device *mdiodev; + + if (!phy_fwnode) + return NULL; + + d = bus_find_device_by_fwnode(&mdio_bus_type, phy_fwnode); + if (d) { + mdiodev = to_mdio_device(d); + if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) + return to_phy_device(d); + put_device(d); + } + + return NULL; +} +EXPORT_SYMBOL(fwnode_phy_find_device); + +/** + * device_phy_find_device - For the given device, get the phy_device + * @dev: Pointer to the given device + * + * Refer return conditions of fwnode_phy_find_device(). + */ +struct phy_device *device_phy_find_device(struct device *dev) +{ + return fwnode_phy_find_device(dev_fwnode(dev)); +} +EXPORT_SYMBOL_GPL(device_phy_find_device); + +/** + * fwnode_get_phy_node - Get the phy_node using the named reference. + * @fwnode: Pointer to fwnode from which phy_node has to be obtained. + * + * Refer return conditions of fwnode_find_reference(). + */ +struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode) +{ + return fwnode_find_reference(fwnode, "phy-handle", 0); +} +EXPORT_SYMBOL_GPL(fwnode_get_phy_node); + /** * phy_probe - probe and init a PHY device * @dev: device to probe and init diff --git a/include/linux/phy.h b/include/linux/phy.h index e2bfb9240587..f2664730a331 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1141,10 +1141,29 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id, bool is_c45, struct phy_c45_device_ids *c45_ids); #if IS_ENABLED(CONFIG_PHYLIB) +struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode); +struct phy_device *device_phy_find_device(struct device *dev); +struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode); struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45); int phy_device_register(struct phy_device *phy); void phy_device_free(struct phy_device *phydev); #else +static inline +struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode) +{ + return NULL; +} + +static inline struct phy_device *device_phy_find_device(struct device *dev) +{ + return NULL; +} + +struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode) +{ + return NULL; +} + static inline struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45) { -- 2.17.1