1 // SPDX-License-Identifier: GPL-2.0-or-later
7 #include <linux/mdio.h>
14 #define DRV_NAME "mdio-aspeed"
44 	struct aspeed_mdio *ctx = bus->priv;  in aspeed_mdio_read()
49 	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr,  in aspeed_mdio_read()
54 		return -EOPNOTSUPP;  in aspeed_mdio_read()
62 	iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);  in aspeed_mdio_read()
64 	rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,  in aspeed_mdio_read()
71 	rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data,  in aspeed_mdio_read()
83 	struct aspeed_mdio *ctx = bus->priv;  in aspeed_mdio_write()
86 	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n",  in aspeed_mdio_write()
91 		return -EOPNOTSUPP;  in aspeed_mdio_write()
100 	iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);  in aspeed_mdio_write()
102 	return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,  in aspeed_mdio_write()
114 	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*ctx));  in aspeed_mdio_probe()
116 		return -ENOMEM;  in aspeed_mdio_probe()
118 	ctx = bus->priv;  in aspeed_mdio_probe()
119 	ctx->base = devm_platform_ioremap_resource(pdev, 0);  in aspeed_mdio_probe()
120 	if (IS_ERR(ctx->base))  in aspeed_mdio_probe()
121 		return PTR_ERR(ctx->base);  in aspeed_mdio_probe()
123 	bus->name = DRV_NAME;  in aspeed_mdio_probe()
124 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id);  in aspeed_mdio_probe()
125 	bus->parent = &pdev->dev;  in aspeed_mdio_probe()
126 	bus->read = aspeed_mdio_read;  in aspeed_mdio_probe()
127 	bus->write = aspeed_mdio_write;  in aspeed_mdio_probe()
129 	rc = of_mdiobus_register(bus, pdev->dev.of_node);  in aspeed_mdio_probe()
131 		dev_err(&pdev->dev, "Cannot register MDIO bus!\n");  in aspeed_mdio_probe()
148 	{ .compatible = "aspeed,ast2600-mdio", },