add simplebus node patch

diff --git a/misc/patches/simplebus-nodeattach.patch b/misc/patches/simplebus-nodeattach.patch
new file mode 100644 (file)
index 0000000..0624669
--- /dev/null
+++ b/misc/patches/simplebus-nodeattach.patch
@@ -0,0 +1,44 @@
+Currently, we do not have a way to iterate over child FDT nodes, which
+is a problem when you have a devices like the USB system on the am335x
+(Beaglebone Black):
+
+https://uglyman.kremlin.cc/gitweb/gitweb.cgi?p=bbb-usb.git;a=blob;f=misc/fdt/am335x-boneblack.dts;h=8799dc1d171961d3cd9a941131a82a15bbe445d7;hb=HEAD#l1489
+
+This patch externalizes simplebus_attach_node which probes for drivers
+to attach to individual nodes, allowing drivers matching parent nodes to
+iterate over their children and call this function on each child. It
+works.
+
+For a driver matching parent node property compatible="ti,am33xx-usb"
+and another driver matching child node property
+compatible="ti,musb-am33xx", we do the following in the parent node
+driver's _attach:
+
+155: for (node = OF_child(faa->fa_node); node > 0; node = OF_peer(node))
+156:     simplebus_attach_node(parent, node);
+
+and get:
+
+       amusbss0 at simplebus0: rev 0.13
+       ammusb0 at simplebus0: rev 0.0  
+       ammusb1 at simplebus0: rev 0.0
+       panic: welcome to openbsd     
+
+This is needed for a USB OTG driver for the am335x in the works. 
+
+Ian
+
+Index: simplebusvar.h
+===================================================================
+RCS file: /cvs/src/sys/arch/arm/simplebus/simplebusvar.h,v
+retrieving revision 1.1
+diff -u -p -r1.1 simplebusvar.h
+--- simplebusvar.h     21 Oct 2016 20:09:49 -0000      1.1
++++ simplebusvar.h     12 Feb 2017 01:27:21 -0000
+@@ -31,3 +31,4 @@ struct simplebus_softc {
+ };
+ 
+ extern void simplebus_attach(struct device *, struct device *, void *);
++extern void simplebus_attach_node(struct device *, int);
+
+