1// SPDX-License-Identifier: GPL-2.0-or-later
 2/**
 3 * emac_arc.c - ARC EMAC specific glue layer
 4 *
 5 * Copyright (C) 2014 Romain Perier
 6 *
 7 * Romain Perier  <romain.perier@gmail.com>
 8 */
 9
10#include <linux/etherdevice.h>
11#include <linux/module.h>
12#include <linux/of_net.h>
13#include <linux/platform_device.h>
14
15#include "emac.h"
16
17#define DRV_NAME    "emac_arc"
18
19static int emac_arc_probe(struct platform_device *pdev)
20{
21	struct device *dev = &pdev->dev;
22	struct arc_emac_priv *priv;
23	phy_interface_t interface;
24	struct net_device *ndev;
25	int err;
26
27	if (!dev->of_node)
28		return -ENODEV;
29
30	ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
31	if (!ndev)
32		return -ENOMEM;
33	platform_set_drvdata(pdev, ndev);
34	SET_NETDEV_DEV(ndev, dev);
35
36	priv = netdev_priv(ndev);
37	priv->drv_name = DRV_NAME;
38
39	err = of_get_phy_mode(dev->of_node, &interface);
40	if (err) {
41		if (err == -ENODEV)
42			interface = PHY_INTERFACE_MODE_MII;
43		else
44			goto out_netdev;
45	}
46
47	priv->clk = devm_clk_get(dev, "hclk");
48	if (IS_ERR(priv->clk)) {
49		dev_err(dev, "failed to retrieve host clock from device tree\n");
50		err = -EINVAL;
51		goto out_netdev;
52	}
53
54	err = arc_emac_probe(ndev, interface);
55out_netdev:
56	if (err)
57		free_netdev(ndev);
58	return err;
59}
60
61static int emac_arc_remove(struct platform_device *pdev)
62{
63	struct net_device *ndev = platform_get_drvdata(pdev);
64	int err;
65
66	err = arc_emac_remove(ndev);
67	free_netdev(ndev);
68	return err;
69}
70
71static const struct of_device_id emac_arc_dt_ids[] = {
72	{ .compatible = "snps,arc-emac" },
73	{ /* Sentinel */ }
74};
75MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
76
77static struct platform_driver emac_arc_driver = {
78	.probe = emac_arc_probe,
79	.remove = emac_arc_remove,
80	.driver = {
81		.name = DRV_NAME,
82		.of_match_table  = emac_arc_dt_ids,
83	},
84};
85
86module_platform_driver(emac_arc_driver);
87
88MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
89MODULE_DESCRIPTION("ARC EMAC platform driver");
90MODULE_LICENSE("GPL");