1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /**
3 * DOC: 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
emac_arc_probe(struct platform_device * pdev)19 static 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);
55 out_netdev:
56 if (err)
57 free_netdev(ndev);
58 return err;
59 }
60
emac_arc_remove(struct platform_device * pdev)61 static int emac_arc_remove(struct platform_device *pdev)
62 {
63 struct net_device *ndev = platform_get_drvdata(pdev);
64
65 arc_emac_remove(ndev);
66 free_netdev(ndev);
67
68 return 0;
69 }
70
71 static const struct of_device_id emac_arc_dt_ids[] = {
72 { .compatible = "snps,arc-emac" },
73 { /* Sentinel */ }
74 };
75 MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
76
77 static 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
86 module_platform_driver(emac_arc_driver);
87
88 MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
89 MODULE_DESCRIPTION("ARC EMAC platform driver");
90 MODULE_LICENSE("GPL");
91