MDIO¶
Overview¶
MDIO is a bus that is commonly used to communicate with ethernet PHY devices. Many ethernet MAC controllers also provide hardware to communicate over MDIO bus with a peripheral device.
This API is intended to be used primarily by PHY drivers but can also be used by user firmware.
API Reference¶
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group
mdio_interface MDIO Interface.
Functions
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void
mdio_bus_enable(const struct device *dev)¶ Enable MDIO bus.
- Parameters
dev – [in] Pointer to the device structure for the controller
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void
mdio_bus_disable(const struct device *dev)¶ Disable MDIO bus and tri-state drivers.
- Parameters
dev – [in] Pointer to the device structure for the controller
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int
mdio_read(const struct device *dev, uint8_t prtad, uint8_t devad, uint16_t *data)¶ Read from MDIO Bus.
This routine provides a generic interface to perform a read on the MDIO bus.
- Parameters
dev – [in] Pointer to the device structure for the controller
prtad – [in] Port address
devad – [in] Device address
data – Pointer to receive read data
- Returns
0 – If successful.
-EIO – General input / output error.
-ETIMEDOUT – If transaction timedout on the bus
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int
mdio_write(const struct device *dev, uint8_t prtad, uint8_t devad, uint16_t data)¶ Write to MDIO bus.
This routine provides a generic interface to perform a write on the MDIO bus.
- Parameters
dev – [in] Pointer to the device structure for the controller
prtad – [in] Port address
devad – [in] Device address
data – [in] Data to write
- Returns
0 – If successful.
-EIO – General input / output error.
-ETIMEDOUT – If transaction timedout on the bus
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void