1 // SPDX-License-Identifier: GPL-2.0
52 	} while (timeout--);  in iproc_mdio_wait_for_idle()
54 	return -ETIMEDOUT;  in iproc_mdio_wait_for_idle()
66 static int iproc_mdio_read(struct mii_bus *bus, int phy_id, int reg)  in iproc_mdio_read()  argument
68 	struct iproc_mdio_priv *priv = bus->priv;  in iproc_mdio_read()
72 	rc = iproc_mdio_wait_for_idle(priv->base);  in iproc_mdio_read()
83 	writel(cmd, priv->base + MII_DATA_OFFSET);  in iproc_mdio_read()
85 	rc = iproc_mdio_wait_for_idle(priv->base);  in iproc_mdio_read()
89 	cmd = readl(priv->base + MII_DATA_OFFSET) & MII_DATA_MASK;  in iproc_mdio_read()
94 static int iproc_mdio_write(struct mii_bus *bus, int phy_id,  in iproc_mdio_write()  argument
97 	struct iproc_mdio_priv *priv = bus->priv;  in iproc_mdio_write()
101 	rc = iproc_mdio_wait_for_idle(priv->base);  in iproc_mdio_write()
113 	writel(cmd, priv->base + MII_DATA_OFFSET);  in iproc_mdio_write()
115 	rc = iproc_mdio_wait_for_idle(priv->base);  in iproc_mdio_write()
125 	struct mii_bus *bus;  in iproc_mdio_probe()  local
128 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in iproc_mdio_probe()
130 		return -ENOMEM;  in iproc_mdio_probe()
132 	priv->base = devm_platform_ioremap_resource(pdev, 0);  in iproc_mdio_probe()
133 	if (IS_ERR(priv->base)) {  in iproc_mdio_probe()
134 		dev_err(&pdev->dev, "failed to ioremap register\n");  in iproc_mdio_probe()
135 		return PTR_ERR(priv->base);  in iproc_mdio_probe()
138 	priv->mii_bus = mdiobus_alloc();  in iproc_mdio_probe()
139 	if (!priv->mii_bus) {  in iproc_mdio_probe()
140 		dev_err(&pdev->dev, "MDIO bus alloc failed\n");  in iproc_mdio_probe()
141 		return -ENOMEM;  in iproc_mdio_probe()
144 	bus = priv->mii_bus;  in iproc_mdio_probe()
145 	bus->priv = priv;  in iproc_mdio_probe()
146 	bus->name = "iProc MDIO bus";  in iproc_mdio_probe()
147 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);  in iproc_mdio_probe()
148 	bus->parent = &pdev->dev;  in iproc_mdio_probe()
149 	bus->read = iproc_mdio_read;  in iproc_mdio_probe()
150 	bus->write = iproc_mdio_write;  in iproc_mdio_probe()
152 	iproc_mdio_config_clk(priv->base);  in iproc_mdio_probe()
154 	rc = of_mdiobus_register(bus, pdev->dev.of_node);  in iproc_mdio_probe()
156 		dev_err(&pdev->dev, "MDIO bus registration failed\n");  in iproc_mdio_probe()
162 	dev_info(&pdev->dev, "Broadcom iProc MDIO bus registered\n");  in iproc_mdio_probe()
167 	mdiobus_free(bus);  in iproc_mdio_probe()
175 	mdiobus_unregister(priv->mii_bus);  in iproc_mdio_remove()
176 	mdiobus_free(priv->mii_bus);  in iproc_mdio_remove()
188 	iproc_mdio_config_clk(priv->base);  in iproc_mdio_resume()
199 	{ .compatible = "brcm,iproc-mdio", },
206 		.name = "iproc-mdio",
219 MODULE_DESCRIPTION("Broadcom iProc MDIO bus controller");
221 MODULE_ALIAS("platform:iproc-mdio");