[oe-commits] Denys Dmytriyenko : udev: update init script for conditional probing of platform bus

[git at git.openembedded.org]

Module: openembedded-core.git
Branch: daisy
Commit: 6886a99758d25991ecd6ee995d18f97996b31177
URL:    http://git.openembedded.org/?p=openembedded-core.git&a=commit;h=6886a99758d25991ecd6ee995d18f97996b31177

Author: Denys Dmytriyenko <denys at ti.com>
Date:   Thu Jun 19 18:53:22 2014 -0400

udev: update init script for conditional probing of platform bus

Make probing of "platform" bus conditional based on PROBE_PLATFORM_BUS
variable from /etc/default/udev-cache on subsequent boots when udev
cache is used. PROBE_PLATFORM_BUS has to be set to "yes" in order to
force probing on every boot, otherwise it uses the old default behaviour
of probing it just the first time.

This is helpful on modern SoCs where most of the low level peripheral
drivers are registered on the platform bus and need to be probed to load
the necessary modules and enable the connected buses and subsystems.

Signed-off-by: Denys Dmytriyenko <denys at ti.com>
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

---

 meta/recipes-core/udev/udev/init | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-core/udev/udev/init b/meta/recipes-core/udev/udev/init
index 410a650..f2c84d5 100644
--- a/meta/recipes-core/udev/udev/init
+++ b/meta/recipes-core/udev/udev/init
@@ -102,7 +102,12 @@ case "$1" in
 
     udevadm control --env=STARTUP=1
     if [ "$not_first_boot" != "" ];then
-            udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus  --subsystem-nomatch=graphics	 --subsystem-nomatch=backlight --subsystem-nomatch=video4linux	--subsystem-nomatch=platform
+            if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then
+                PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform"
+            else
+                PLATFORM_BUS_NOMATCH=""
+            fi
+            udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux $PLATFORM_BUS_NOMATCH
             (udevadm settle --timeout=3; udevadm control --env=STARTUP=)&
     else
             udevadm trigger --action=add