Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / ethernet / arc / emac_arc.c

diff --git a/kernel/drivers/net/ethernet/arc/emac_arc.c b/kernel/drivers/net/ethernet/arc/emac_arc.c
new file mode 100644 (file)
index 0000000..f9cb99b
--- /dev/null
+++ b/kernel/drivers/net/ethernet/arc/emac_arc.c
@@ -0,0 +1,95 @@
+/**
+ * emac_arc.c - ARC EMAC specific glue layer
+ *
+ * Copyright (C) 2014 Romain Perier
+ *
+ * Romain Perier  <romain.perier@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/of_net.h>
+#include <linux/platform_device.h>
+
+#include "emac.h"
+
+#define DRV_NAME    "emac_arc"
+#define DRV_VERSION "1.0"
+
+static int emac_arc_probe(struct platform_device *pdev)
+{
+       struct device *dev = &pdev->dev;
+       struct net_device *ndev;
+       struct arc_emac_priv *priv;
+       int interface, err;
+
+       if (!dev->of_node)
+               return -ENODEV;
+
+       ndev = alloc_etherdev(sizeof(struct arc_emac_priv));
+       if (!ndev)
+               return -ENOMEM;
+       platform_set_drvdata(pdev, ndev);
+       SET_NETDEV_DEV(ndev, dev);
+
+       priv = netdev_priv(ndev);
+       priv->drv_name = DRV_NAME;
+       priv->drv_version = DRV_VERSION;
+
+       interface = of_get_phy_mode(dev->of_node);
+       if (interface < 0)
+               interface = PHY_INTERFACE_MODE_MII;
+
+       priv->clk = devm_clk_get(dev, "hclk");
+       if (IS_ERR(priv->clk)) {
+               dev_err(dev, "failed to retrieve host clock from device tree\n");
+               err = -EINVAL;
+               goto out_netdev;
+       }
+
+       err = arc_emac_probe(ndev, interface);
+out_netdev:
+       if (err)
+               free_netdev(ndev);
+       return err;
+}
+
+static int emac_arc_remove(struct platform_device *pdev)
+{
+       struct net_device *ndev = platform_get_drvdata(pdev);
+       int err;
+
+       err = arc_emac_remove(ndev);
+       free_netdev(ndev);
+       return err;
+}
+
+static const struct of_device_id emac_arc_dt_ids[] = {
+       { .compatible = "snps,arc-emac" },
+       { /* Sentinel */ }
+};
+
+static struct platform_driver emac_arc_driver = {
+       .probe = emac_arc_probe,
+       .remove = emac_arc_remove,
+       .driver = {
+               .name = DRV_NAME,
+               .of_match_table  = emac_arc_dt_ids,
+       },
+};
+
+module_platform_driver(emac_arc_driver);
+
+MODULE_AUTHOR("Romain Perier <romain.perier@gmail.com>");
+MODULE_DESCRIPTION("ARC EMAC platform driver");
+MODULE_LICENSE("GPL");