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");