1 // SPDX-License-Identifier: GPL-2.0
2 /* Qualcomm IPQ8064 MDIO interface driver
47 	return regmap_read_poll_timeout(priv->base, MII_ADDR_REG_ADDR, busy,  in ipq8064_mdio_wait_busy()
56 	struct ipq8064_mdio *priv = bus->priv;  in ipq8064_mdio_read()
62 		return -EOPNOTSUPP;  in ipq8064_mdio_read()
67 	regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);  in ipq8064_mdio_read()
74 	regmap_read(priv->base, MII_DATA_REG_ADDR, &ret_val);  in ipq8064_mdio_read()
82 	struct ipq8064_mdio *priv = bus->priv;  in ipq8064_mdio_write()
86 		return -EOPNOTSUPP;  in ipq8064_mdio_write()
88 	regmap_write(priv->base, MII_DATA_REG_ADDR, data);  in ipq8064_mdio_write()
93 	regmap_write(priv->base, MII_ADDR_REG_ADDR, miiaddr);  in ipq8064_mdio_write()
102 	struct device_node *np = pdev->dev.of_node;  in ipq8064_mdio_probe()
107 	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv));  in ipq8064_mdio_probe()
109 		return -ENOMEM;  in ipq8064_mdio_probe()
111 	bus->name = "ipq8064_mdio_bus";  in ipq8064_mdio_probe()
112 	bus->read = ipq8064_mdio_read;  in ipq8064_mdio_probe()
113 	bus->write = ipq8064_mdio_write;  in ipq8064_mdio_probe()
114 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));  in ipq8064_mdio_probe()
115 	bus->parent = &pdev->dev;  in ipq8064_mdio_probe()
117 	priv = bus->priv;  in ipq8064_mdio_probe()
118 	priv->base = device_node_to_regmap(np);  in ipq8064_mdio_probe()
119 	if (IS_ERR(priv->base)) {  in ipq8064_mdio_probe()
120 		if (priv->base == ERR_PTR(-EPROBE_DEFER))  in ipq8064_mdio_probe()
121 			return -EPROBE_DEFER;  in ipq8064_mdio_probe()
123 		dev_err(&pdev->dev, "error getting device regmap, error=%pe\n",  in ipq8064_mdio_probe()
124 			priv->base);  in ipq8064_mdio_probe()
125 		return PTR_ERR(priv->base);  in ipq8064_mdio_probe()
147 	{ .compatible = "qcom,ipq8064-mdio" },
156 		.name = "ipq8064-mdio",
163 MODULE_DESCRIPTION("Qualcomm IPQ8064 MDIO interface driver");