treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / net / ethernet / arc / emac_arc.c
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 #define DRV_VERSION "1.0"
19
20 static int emac_arc_probe(struct platform_device *pdev)
21 {
22         struct device *dev = &pdev->dev;
23         struct net_device *ndev;
24         struct arc_emac_priv *priv;
25         int interface, 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         priv->drv_version = DRV_VERSION;
39
40         interface = of_get_phy_mode(dev->of_node);
41         if (interface < 0)
42                 interface = PHY_INTERFACE_MODE_MII;
43
44         priv->clk = devm_clk_get(dev, "hclk");
45         if (IS_ERR(priv->clk)) {
46                 dev_err(dev, "failed to retrieve host clock from device tree\n");
47                 err = -EINVAL;
48                 goto out_netdev;
49         }
50
51         err = arc_emac_probe(ndev, interface);
52 out_netdev:
53         if (err)
54                 free_netdev(ndev);
55         return err;
56 }
57
58 static int emac_arc_remove(struct platform_device *pdev)
59 {
60         struct net_device *ndev = platform_get_drvdata(pdev);
61         int err;
62
63         err = arc_emac_remove(ndev);
64         free_netdev(ndev);
65         return err;
66 }
67
68 static const struct of_device_id emac_arc_dt_ids[] = {
69         { .compatible = "snps,arc-emac" },
70         { /* Sentinel */ }
71 };
72 MODULE_DEVICE_TABLE(of, emac_arc_dt_ids);
73
74 static struct platform_driver emac_arc_driver = {
75         .probe = emac_arc_probe,
76         .remove = emac_arc_remove,
77         .driver = {
78                 .name = DRV_NAME,
79                 .of_match_table  = emac_arc_dt_ids,
80         },
81 };
82
83 module_platform_driver(emac_arc_driver);
84
85 MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
86 MODULE_DESCRIPTION("ARC EMAC platform driver");
87 MODULE_LICENSE("GPL");