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"); 91