drivers/net/ethernet/arc/emac_arc.c

   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
  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
  61 static 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
  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");