net: ethernet: wiznet: w5X00 add device tree support

The w5X00 chip provides an SPI to Ethernet inteface. This patch allows
platform devices to be defined through the device tree.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 22 insertions, 2 deletions

diff --git a/drivers/net/ethernet/wiznet/w5100-spi.c b/drivers/net/ethernet/wiznet/w5100-spi.c
index 918b3e50850a..2b4126d2427d 100644
--- a/drivers/net/ethernet/wiznet/w5100-spi.c
+++ b/drivers/net/ethernet/wiznet/w5100-spi.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/of_net.h>
+#include <linux/of_device.h>
 #include <linux/spi/spi.h>
 
 #include "w5100.h"
@@ -409,14 +410,32 @@ static const struct w5100_ops w5500_ops = {
         .init = w5500_spi_init,
 };
 
+static const struct of_device_id w5100_of_match[] = {
+        { .compatible = "wiznet,w5100", .data = (const void*)W5100, },
+        { .compatible = "wiznet,w5200", .data = (const void*)W5200, },
+        { .compatible = "wiznet,w5500", .data = (const void*)W5500, },
+        { },
+};
+MODULE_DEVICE_TABLE(of, w5100_of_match);
+
 static int w5100_spi_probe(struct spi_device *spi)
 {
-        const struct spi_device_id *id = spi_get_device_id(spi);
+        const struct of_device_id *of_id;
         const struct w5100_ops *ops;
+        kernel_ulong_t driver_data;
         int priv_size;
         const void *mac = of_get_mac_address(spi->dev.of_node);
 
-        switch (id->driver_data) {
+        if (spi->dev.of_node) {
+                of_id = of_match_device(w5100_of_match, &spi->dev);
+                if (!of_id)
+                        return -ENODEV;
+                driver_data = (kernel_ulong_t)of_id->data;
+        } else {
+                driver_data = spi_get_device_id(spi)->driver_data;
+        }
+
+        switch (driver_data) {
         case W5100:
                 ops = &w5100_spi_ops;
                 priv_size = 0;
@@ -453,6 +472,7 @@ static struct spi_driver w5100_spi_driver = {
         .driver         = {
                 .name   = "w5100",
                 .pm     = &w5100_pm_ops,
+                .of_match_table = w5100_of_match,
         },
         .probe          = w5100_spi_probe,
         .remove         = w5100_spi_remove,