[RFC] add phy-handle property for fec_mpc52xx

[Grant Likely <grant.likely@secretlab.ca>]

From: Olaf Hering <olaf@aepfle.de>

The new network driver fec_mpc52xx will not work on efika because the
firmware does not provide all required properties.
http://www.powerdeveloper.org/asset/by-id/46 has a Forth script to
create more properties. But only the phy stuff is required to get a
working network.

This should go into the kernel because its appearently
impossible to boot the script via tftp and then load the real boot
binary (yaboot or zimage).

(Olaf's s-o-b line needs to go here)
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
---

Here's my respin of Olaf's patch to move it to fixup_device_tree_efika()
and to make it check if the nodes exist before blindly creating them.

Cheers,
g.

 arch/powerpc/kernel/prom_init.c |   39 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 1add6ef..5d89a21 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2216,6 +2216,45 @@ static void __init fixup_device_tree_efika(void)
 			prom_printf("fixup_device_tree_efika: ",
 				"skipped entry %x - setprop error\n", i);
 	}
+
+	/* Make sure ethernet mdio bus node exists */
+	node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
+	if (!PHANDLE_VALID(node)) {
+		prom_printf("Adding Ethernet MDIO node\n");
+		call_prom("interpret", 1, 1,
+			" s\" /builtin\" find-device"
+			" new-device"
+				" 1 encode-int s\" #address-cells\" property"
+				" 0 encode-int s\" #size-cells\" property"
+				" s\" mdio\" 2dup device-name device-type"
+				" s\" mpc5200b-fec-phy\" encode-string"
+				" s\" compatible\" property"
+				" 0xf0003000 0x400 reg"
+				" 0x2 encode-int"
+				" 0x5 encode-int encode+"
+				" 0x3 encode-int encode+"
+				" s\" interrupts\" property"
+			" finish-device");
+	};
+
+	/* Make sure ethernet phy device node exist */
+	node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio/ethernet-phy"));
+	if (!PHANDLE_VALID(node)) {
+		prom_printf("Adding Ethernet PHY node\n");
+		call_prom("interpret", 1, 1,
+			" s\" /builtin/mdio\" find-device"
+			" new-device"
+				" s\" ethernet-phy\" device-name"
+				" 0x10 encode-int s\" reg\" property"
+				" my-self"
+				" ihandle>phandle"
+			" finish-device"
+			" s\" /builtin/ethernet\" find-device"
+				" encode-int"
+				" s\" phy-handle\" property"
+			" device-end");
+	}
+
 }
 #else
 #define fixup_device_tree_efika()