add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/ethernet/arc/emac_arc.c
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@@ -1,19 +1,10 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /**
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- * emac_arc.c - ARC EMAC specific glue layer
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+ * DOC: emac_arc.c - ARC EMAC specific glue layer
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  *
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  * Copyright (C) 2014 Romain Perier
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  *
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  * Romain Perier  <romain.perier@gmail.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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 #include <linux/etherdevice.h>
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@@ -24,14 +15,14 @@
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 #include "emac.h"
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 #define DRV_NAME    "emac_arc"
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-#define DRV_VERSION "1.0"
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 static int emac_arc_probe(struct platform_device *pdev)
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 {
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 	struct device *dev = &pdev->dev;
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-	struct net_device *ndev;
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 	struct arc_emac_priv *priv;
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-	int interface, err;
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+	phy_interface_t interface;
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+	struct net_device *ndev;
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+	int err;
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 	if (!dev->of_node)
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 		return -ENODEV;
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@@ -44,11 +35,14 @@
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 	priv = netdev_priv(ndev);
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 	priv->drv_name = DRV_NAME;
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-	priv->drv_version = DRV_VERSION;
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-	interface = of_get_phy_mode(dev->of_node);
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-	if (interface < 0)
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-		interface = PHY_INTERFACE_MODE_MII;
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+	err = of_get_phy_mode(dev->of_node, &interface);
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+	if (err) {
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+		if (err == -ENODEV)
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+			interface = PHY_INTERFACE_MODE_MII;
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+		else
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+			goto out_netdev;
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+	}
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 	priv->clk = devm_clk_get(dev, "hclk");
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 	if (IS_ERR(priv->clk)) {