1 // SPDX-License-Identifier: GPL-2.0-or-later
8 #include <linux/mdio.h>
15 #define DRV_NAME "mdio-aspeed"
51 	struct aspeed_mdio *ctx = bus->priv;  in aspeed_mdio_op()
54 	dev_dbg(&bus->dev, "%s: st: %u op: %u, phyad: %u, regad: %u, data: %u\n",  in aspeed_mdio_op()
64 	iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL);  in aspeed_mdio_op()
66 	return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl,  in aspeed_mdio_op()
74 	struct aspeed_mdio *ctx = bus->priv;  in aspeed_mdio_get_data()
78 	rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data,  in aspeed_mdio_get_data()
144 	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr,  in aspeed_mdio_read()
155 	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n",  in aspeed_mdio_write()
170 	bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*ctx));  in aspeed_mdio_probe()
172 		return -ENOMEM;  in aspeed_mdio_probe()
174 	ctx = bus->priv;  in aspeed_mdio_probe()
175 	ctx->base = devm_platform_ioremap_resource(pdev, 0);  in aspeed_mdio_probe()
176 	if (IS_ERR(ctx->base))  in aspeed_mdio_probe()
177 		return PTR_ERR(ctx->base);  in aspeed_mdio_probe()
179 	ctx->reset = devm_reset_control_get_optional_shared(&pdev->dev, NULL);  in aspeed_mdio_probe()
180 	if (IS_ERR(ctx->reset))  in aspeed_mdio_probe()
181 		return PTR_ERR(ctx->reset);  in aspeed_mdio_probe()
183 	reset_control_deassert(ctx->reset);  in aspeed_mdio_probe()
185 	bus->name = DRV_NAME;  in aspeed_mdio_probe()
186 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id);  in aspeed_mdio_probe()
187 	bus->parent = &pdev->dev;  in aspeed_mdio_probe()
188 	bus->read = aspeed_mdio_read;  in aspeed_mdio_probe()
189 	bus->write = aspeed_mdio_write;  in aspeed_mdio_probe()
190 	bus->probe_capabilities = MDIOBUS_C22_C45;  in aspeed_mdio_probe()
192 	rc = of_mdiobus_register(bus, pdev->dev.of_node);  in aspeed_mdio_probe()
194 		dev_err(&pdev->dev, "Cannot register MDIO bus!\n");  in aspeed_mdio_probe()
195 		reset_control_assert(ctx->reset);  in aspeed_mdio_probe()
207 	struct aspeed_mdio *ctx = bus->priv;  in aspeed_mdio_remove()
209 	reset_control_assert(ctx->reset);  in aspeed_mdio_remove()
216 	{ .compatible = "aspeed,ast2600-mdio", },