net: cirrus: add DT support for Cirrus EP93xx

- add OF ID match table
- get phy_id from the device tree, as part of mdio
- copy_addr is now always used, as there is no SoC/board that aren't
- dropped platform header

Signed-off-by: Nikita Shubin <nikita.shubin@maquefel.me>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/net/ethernet/cirrus/ep93xx_eth.c b/drivers/net/ethernet/cirrus/ep93xx_eth.c
index 1f495cfd7959b045c8186f6e84a2cbea43eeb1f2..2523d9c9d1b84a63f1b41b9e8b358763478727e1 100644 (file)
--- a/drivers/net/ethernet/cirrus/ep93xx_eth.c
+++ b/drivers/net/ethernet/cirrus/ep93xx_eth.c
@@ -16,13 +16,12 @@
 #include <linux/ethtool.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 
-#include <linux/platform_data/eth-ep93xx.h>
-
 #define DRV_MODULE_NAME                "ep93xx-eth"
 
 #define RX_QUEUE_ENTRIES       64
@@ -738,25 +737,6 @@ static const struct net_device_ops ep93xx_netdev_ops = {
        .ndo_set_mac_address    = eth_mac_addr,
 };
 
-static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
-{
-       struct net_device *dev;
-
-       dev = alloc_etherdev(sizeof(struct ep93xx_priv));
-       if (dev == NULL)
-               return NULL;
-
-       eth_hw_addr_set(dev, data->dev_addr);
-
-       dev->ethtool_ops = &ep93xx_ethtool_ops;
-       dev->netdev_ops = &ep93xx_netdev_ops;
-
-       dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
-
-       return dev;
-}
-
-
 static void ep93xx_eth_remove(struct platform_device *pdev)
 {
        struct net_device *dev;
@@ -786,27 +766,47 @@ static void ep93xx_eth_remove(struct platform_device *pdev)
 
 static int ep93xx_eth_probe(struct platform_device *pdev)
 {
-       struct ep93xx_eth_data *data;
        struct net_device *dev;
        struct ep93xx_priv *ep;
        struct resource *mem;
+       void __iomem *base_addr;
+       struct device_node *np;
+       u32 phy_id;
        int irq;
        int err;
 
        if (pdev == NULL)
                return -ENODEV;
-       data = dev_get_platdata(&pdev->dev);
 
        mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        irq = platform_get_irq(pdev, 0);
        if (!mem || irq < 0)
                return -ENXIO;
 
-       dev = ep93xx_dev_alloc(data);
+       base_addr = ioremap(mem->start, resource_size(mem));
+       if (!base_addr)
+               return dev_err_probe(&pdev->dev, -EIO, "Failed to ioremap ethernet registers\n");
+
+       np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
+       if (!np)
+               return dev_err_probe(&pdev->dev, -ENODEV, "Please provide \"phy-handle\"\n");
+
+       err = of_property_read_u32(np, "reg", &phy_id);
+       of_node_put(np);
+       if (err)
+               return dev_err_probe(&pdev->dev, -ENOENT, "Failed to locate \"phy_id\"\n");
+
+       dev = alloc_etherdev(sizeof(struct ep93xx_priv));
        if (dev == NULL) {
                err = -ENOMEM;
                goto err_out;
        }
+
+       eth_hw_addr_set(dev, base_addr + 0x50);
+       dev->ethtool_ops = &ep93xx_ethtool_ops;
+       dev->netdev_ops = &ep93xx_netdev_ops;
+       dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+
        ep = netdev_priv(dev);
        ep->dev = dev;
        SET_NETDEV_DEV(dev, &pdev->dev);
@@ -822,15 +822,10 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
                goto err_out;
        }
 
-       ep->base_addr = ioremap(mem->start, resource_size(mem));
-       if (ep->base_addr == NULL) {
-               dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
-               err = -EIO;
-               goto err_out;
-       }
+       ep->base_addr = base_addr;
        ep->irq = irq;
 
-       ep->mii.phy_id = data->phy_id;
+       ep->mii.phy_id = phy_id;
        ep->mii.phy_id_mask = 0x1f;
        ep->mii.reg_num_mask = 0x1f;
        ep->mii.dev = dev;
@@ -857,12 +852,18 @@ err_out:
        return err;
 }
 
+static const struct of_device_id ep93xx_eth_of_ids[] = {
+       { .compatible = "cirrus,ep9301-eth" },
+       { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ep93xx_eth_of_ids);
 
 static struct platform_driver ep93xx_eth_driver = {
        .probe          = ep93xx_eth_probe,
        .remove_new     = ep93xx_eth_remove,
        .driver         = {
                .name   = "ep93xx-eth",
+               .of_match_table = ep93xx_eth_of_ids,
        },
 };