1 // SPDX-License-Identifier: GPL-2.0+
3  * Hisilicon Fast Ethernet MDIO Bus Driver
8 #include <linux/clk.h>
24 	struct clk *clk;  member
32 	return readl_poll_timeout(data->membase + MDIO_RWCTRL,  in hisi_femac_mdio_wait_ready()
38 	struct hisi_femac_mdio_data *data = bus->priv;  in hisi_femac_mdio_read()
46 	       data->membase + MDIO_RWCTRL);  in hisi_femac_mdio_read()
52 	return readl(data->membase + MDIO_RO_DATA) & 0xFFFF;  in hisi_femac_mdio_read()
58 	struct hisi_femac_mdio_data *data = bus->priv;  in hisi_femac_mdio_write()
67 	       data->membase + MDIO_RWCTRL);  in hisi_femac_mdio_write()
74 	struct device_node *np = pdev->dev.of_node;  in hisi_femac_mdio_probe()
81 		return -ENOMEM;  in hisi_femac_mdio_probe()
83 	bus->name = "hisi_femac_mii_bus";  in hisi_femac_mdio_probe()
84 	bus->read = &hisi_femac_mdio_read;  in hisi_femac_mdio_probe()
85 	bus->write = &hisi_femac_mdio_write;  in hisi_femac_mdio_probe()
86 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);  in hisi_femac_mdio_probe()
87 	bus->parent = &pdev->dev;  in hisi_femac_mdio_probe()
89 	data = bus->priv;  in hisi_femac_mdio_probe()
90 	data->membase = devm_platform_ioremap_resource(pdev, 0);  in hisi_femac_mdio_probe()
91 	if (IS_ERR(data->membase)) {  in hisi_femac_mdio_probe()
92 		ret = PTR_ERR(data->membase);  in hisi_femac_mdio_probe()
96 	data->clk = devm_clk_get(&pdev->dev, NULL);  in hisi_femac_mdio_probe()
97 	if (IS_ERR(data->clk)) {  in hisi_femac_mdio_probe()
98 		ret = PTR_ERR(data->clk);  in hisi_femac_mdio_probe()
102 	ret = clk_prepare_enable(data->clk);  in hisi_femac_mdio_probe()
115 	clk_disable_unprepare(data->clk);  in hisi_femac_mdio_probe()
124 	struct hisi_femac_mdio_data *data = bus->priv;  in hisi_femac_mdio_remove()
127 	clk_disable_unprepare(data->clk);  in hisi_femac_mdio_remove()
132 	{ .compatible = "hisilicon,hisi-femac-mdio" },
141 		.name = "hisi-femac-mdio",
148 MODULE_DESCRIPTION("Hisilicon Fast Ethernet MAC MDIO interface driver");