[ar7] fallback to "dumb switch" mode if no PHY was detected

This will enable the second Ethernet MAC in most cases, but will allow
previously non working devices to work.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20022 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar7/patches-2.6.32/950-cpmac_fallback_switch.patch b/target/linux/ar7/patches-2.6.32/950-cpmac_fallback_switch.patch
new file mode 100644 (file)
index 0000000..b5ba861
--- /dev/null
+++ b/target/linux/ar7/patches-2.6.32/950-cpmac_fallback_switch.patch
@@ -0,0 +1,16 @@
+Index: linux-2.6.32.9/drivers/net/cpmac.c
+===================================================================
+--- linux-2.6.32.9.orig/drivers/net/cpmac.c    2010-03-06 23:12:46.000000000 +0100
++++ linux-2.6.32.9/drivers/net/cpmac.c 2010-03-06 23:13:14.000000000 +0100
+@@ -1132,8 +1132,9 @@
+       }
+ 
+       if (phy_id == PHY_MAX_ADDR) {
+-              dev_err(&pdev->dev, "no PHY present\n");
+-              return -ENODEV;
++              dev_err(&pdev->dev, "no PHY present, falling back to switch mode\n");
++              strncpy(mdio_bus_id, "0", MII_BUS_ID_SIZE); /* fixed phys bus */
++              phy_id = pdev->id;
+       }
+ 
+       dev = alloc_etherdev_mq(sizeof(*priv), CPMAC_QUEUES);