LXR linux/drivers/net/ethernet/arc/emac

   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
  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");
  91