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authorGrant Likely <grant.likely@secretlab.ca>2012-02-01 11:22:22 -0700
committerGrant Likely <grant.likely@secretlab.ca>2012-02-01 14:26:30 -0700
commit07d57a32fb6eb2da017796e038682f817a4f685e (patch)
tree4c7bb83cbda8db99ed91f575d8355c5b45b16cfb /drivers/base/core.c
parent7aff0fe33033fc75b61446ba29d38b1b1354af9f (diff)
drivercore: Output common devicetree information in uevent
When userspace needs to find a specific device, it currently isn't easy to resolve a /sys/devices/ path from a specific device tree node. Nor is it easy to obtain the compatible list for devices. This patch generalizes the code that inserts OF_* values into the uevent device attribute so that any device that is attached to an OF node will have that information exported to userspace. Without this patch only platform devices and some powerpc-specific busses have access to this data. The original function also creates a MODALIAS property for the compatible list, but that code has not been generalized into the common case because it has the potential to break module loading on a lot of bus types. Bus types are still responsible for their own MODALIAS properties. Boot tested on ARM and compile tested on PowerPC and SPARC. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tobias Klauser <tklauser@distanz.ch> Cc: Frederic Lambert <frdrc66@gmail.com> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Mark Brown <broonie@sirena.org.uk> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/base/core.c')
-rw-r--r--drivers/base/core.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 4a67cc0c8b3..28d8c21bb32 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -18,6 +18,8 @@
#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/genhd.h>
#include <linux/kallsyms.h>
#include <linux/mutex.h>
@@ -267,6 +269,9 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
if (dev->driver)
add_uevent_var(env, "DRIVER=%s", dev->driver->name);
+ /* Add common DT information about the device */
+ of_device_uevent(dev, env);
+
/* have the bus specific function add its stuff */
if (dev->bus && dev->bus->uevent) {
retval = dev->bus->uevent(dev, env);