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| author | Grant Likely | 2012-02-01 19:22:22 +0100 |
|---|---|---|
| committer | Grant Likely | 2012-02-01 22:26:30 +0100 |
| commit | 07d57a32fb6eb2da017796e038682f817a4f685e (patch) | |
| tree | 4c7bb83cbda8db99ed91f575d8355c5b45b16cfb /drivers/base/core.c | |
| parent | of: Add of_property_match_string() to find index into a string list (diff) | |
| download | kernel-qcow2-linux-07d57a32fb6eb2da017796e038682f817a4f685e.tar.gz kernel-qcow2-linux-07d57a32fb6eb2da017796e038682f817a4f685e.tar.xz kernel-qcow2-linux-07d57a32fb6eb2da017796e038682f817a4f685e.zip | |
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.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/base/core.c b/drivers/base/core.c index 4a67cc0c8b37..28d8c21bb323 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); |