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authorDenys Dmytriyenko <denys@ti.com>2014-06-19 18:53:22 -0400
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-06-25 11:49:40 +0100
commit70a695735e0a7d14448f2f5a9986bfe105210a91 (patch)
tree64049a0f4d0b2e4b237502ff40d6c7055c54f4b2
parent2abc6923956a3ebf8c0a00122ce605b8ec10ceb7 (diff)
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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@ti.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-core/udev/udev/init7
1 files changed, 6 insertions, 1 deletions
diff --git a/meta/recipes-core/udev/udev/init b/meta/recipes-core/udev/udev/init
index 410a650bd1..f2c84d5d3e 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