From 4257b72f5167fa650095be8c84d4e46d5e107342 Mon Sep 17 00:00:00 2001 From: kremlin Date: Sat, 11 Feb 2017 20:13:04 -0600 Subject: [PATCH] add simplebus node patch --- misc/patches/simplebus-nodeattach.patch | 44 +++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 misc/patches/simplebus-nodeattach.patch diff --git a/misc/patches/simplebus-nodeattach.patch b/misc/patches/simplebus-nodeattach.patch new file mode 100644 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); + + -- 2.41.0