1 // SPDX-License-Identifier: GPL-2.0+
11 #include <linux/mdio-mux.h>
39 	struct bcm6368_mdiomux_desc *md = bus->priv;  in bcm6368_mdiomux_read()
43 	__raw_writel(0, md->base + MDIOC_REG);  in bcm6368_mdiomux_read()
48 	if (md->ext_phy)  in bcm6368_mdiomux_read()
51 	__raw_writel(reg, md->base + MDIOC_REG);  in bcm6368_mdiomux_read()
53 	ret = __raw_readw(md->base + MDIOD_REG);  in bcm6368_mdiomux_read()
61 	struct bcm6368_mdiomux_desc *md = bus->priv;  in bcm6368_mdiomux_write()
64 	__raw_writel(0, md->base + MDIOC_REG);  in bcm6368_mdiomux_write()
69 	if (md->ext_phy)  in bcm6368_mdiomux_write()
73 	__raw_writel(reg, md->base + MDIOC_REG);  in bcm6368_mdiomux_write()
84 	md->ext_phy = desired_child;  in bcm6368_mdiomux_switch_fn()
96 	md = devm_kzalloc(&pdev->dev, sizeof(*md), GFP_KERNEL);  in bcm6368_mdiomux_probe()
98 		return -ENOMEM;  in bcm6368_mdiomux_probe()
99 	md->dev = &pdev->dev;  in bcm6368_mdiomux_probe()
103 		return -EINVAL;  in bcm6368_mdiomux_probe()
106 	 * Just ioremap, as this MDIO block is usually integrated into an  in bcm6368_mdiomux_probe()
109 	md->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));  in bcm6368_mdiomux_probe()
110 	if (!md->base) {  in bcm6368_mdiomux_probe()
111 		dev_err(&pdev->dev, "failed to ioremap register\n");  in bcm6368_mdiomux_probe()
112 		return -ENOMEM;  in bcm6368_mdiomux_probe()
115 	md->mii_bus = devm_mdiobus_alloc(&pdev->dev);  in bcm6368_mdiomux_probe()
116 	if (!md->mii_bus) {  in bcm6368_mdiomux_probe()
117 		dev_err(&pdev->dev, "mdiomux bus alloc failed\n");  in bcm6368_mdiomux_probe()
118 		return -ENOMEM;  in bcm6368_mdiomux_probe()
121 	bus = md->mii_bus;  in bcm6368_mdiomux_probe()
122 	bus->priv = md;  in bcm6368_mdiomux_probe()
123 	bus->name = "BCM6368 MDIO mux bus";  in bcm6368_mdiomux_probe()
124 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d", pdev->name, pdev->id);  in bcm6368_mdiomux_probe()
125 	bus->parent = &pdev->dev;  in bcm6368_mdiomux_probe()
126 	bus->read = bcm6368_mdiomux_read;  in bcm6368_mdiomux_probe()
127 	bus->write = bcm6368_mdiomux_write;  in bcm6368_mdiomux_probe()
128 	bus->phy_mask = 0x3f;  in bcm6368_mdiomux_probe()
129 	bus->dev.of_node = pdev->dev.of_node;  in bcm6368_mdiomux_probe()
133 		dev_err(&pdev->dev, "mdiomux registration failed\n");  in bcm6368_mdiomux_probe()
139 	rc = mdio_mux_init(md->dev, md->dev->of_node,  in bcm6368_mdiomux_probe()
140 			   bcm6368_mdiomux_switch_fn, &md->mux_handle, md,  in bcm6368_mdiomux_probe()
141 			   md->mii_bus);  in bcm6368_mdiomux_probe()
143 		dev_info(md->dev, "mdiomux initialization failed\n");  in bcm6368_mdiomux_probe()
147 	dev_info(&pdev->dev, "Broadcom BCM6368 MDIO mux bus\n");  in bcm6368_mdiomux_probe()
160 	mdio_mux_uninit(md->mux_handle);  in bcm6368_mdiomux_remove()
161 	mdiobus_unregister(md->mii_bus);  in bcm6368_mdiomux_remove()
165 	{ .compatible = "brcm,bcm6368-mdio-mux", },
172 		.name = "bcm6368-mdio-mux",