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| author | Michal Simek <michal.simek@xilinx.com> | 2022-02-23 15:45:42 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2022-03-09 12:43:16 +0100 |
| commit | a744a284e35420077b0c838598eb24c98710412a (patch) | |
| tree | 5645040c87668bc7ae5ff2b9321d08c5009589eb /include/phy.h | |
| parent | 3249116d8381a1a8f0d17c95acecd7c78b40e569 (diff) | |
| download | u-boot-a744a284e35420077b0c838598eb24c98710412a.tar.gz | |
net: phy: Add support for ethernet-phy-id with gpio reset
Ethernet phy like dp83867 is using strapping resistors to setup PHY
address. On Xilinx boards strapping is setup on wires which are connected
to SOC where internal pull ups/downs influnce phy address. That's why there
is a need to setup pins properly (via pinctrl driver for example) and then
perform phy reset. I can be workarounded by reset gpio done for mdio bus
but this is not working properly when multiply phys sitting on the same
bus. That's why it needs to be done via ethernet-phy-id driver where dt
binding has gpio reset per phy.
DT binding is available here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/net/ethernet-phy.yaml
The driver is are reading the vendor and device id from valid phy node
using ofnode_read_eth_phy_id() and creating a phy device.
Kconfig PHY_ETHERNET_ID symbol is used because not every platform has gpio
support.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Link: https://lore.kernel.org/r/70ab7d71c812b2c972d48c129e416c921af0d7f5.1645627539.git.michal.simek@xilinx.com
Diffstat (limited to 'include/phy.h')
| -rw-r--r-- | include/phy.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/phy.h b/include/phy.h index 832d7a16957..9ea4bd42db4 100644 --- a/include/phy.h +++ b/include/phy.h @@ -468,6 +468,19 @@ struct phy_device *phy_device_create(struct mii_dev *bus, int addr, u32 phy_id, bool is_c45, phy_interface_t interface); +/** + * phy_connect_phy_id() - Connect to phy device by reading PHY id + * from phy node. + * + * @bus: MII/MDIO bus that hosts the PHY + * @dev: Ethernet device to associate to the PHY + * @interface: Interface between the MAC and PHY + * @return: pointer to phy_device if a PHY is found, + * or NULL otherwise + */ +struct phy_device *phy_connect_phy_id(struct mii_dev *bus, struct udevice *dev, + phy_interface_t interface); + static inline ofnode phy_get_ofnode(struct phy_device *phydev) { if (ofnode_valid(phydev->node)) |