mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
5590f3196b
So I've been annoyed lately with having a bunch of devices such as i2c eeproms (for use by VPDs, server world !) and other bits and pieces that I want to be able to identify from userspace, and possibly provide additional data about from FW. Basically, it boils down to correlating the sysfs device with the OF tree device node, so that user space can use device-tree info such as additional "location" or "label" (or whatever else we can come up with) propreties to identify a given device, or get some attributes of use about it, etc... Now, so far, we've done that in some subsystem in a fairly ad-hoc basis using "devspec" properties. For example, PCI creates them if it can correlate the probed device with a DT node. Some powerpc specific busses do that too. However, i2c doesn't and it would be nice to have something more generic since technically any device can have a corresponding device tree node. This patch adds an "of_node" symlink to devices that have a non-NULL dev->of_node pointer, the patch is pretty trivial and seems to work just fine for me. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
||
|---|---|---|
| .. | ||
| firewire-cdev | ||
| o2cb | ||
| syscalls | ||
| sysfs-acpi-pmprofile | ||
| sysfs-bus-firewire | ||
| sysfs-bus-usb | ||
| sysfs-bus-xen-backend | ||
| sysfs-class-backlight | ||
| sysfs-class-rfkill | ||
| sysfs-class-tpm | ||
| sysfs-class-ubi | ||
| sysfs-class-udc | ||
| sysfs-devices | ||
| sysfs-devices-node | ||
| sysfs-devices-system-cpu | ||
| sysfs-devices-system-xen_memory | ||
| sysfs-driver-ib_srp | ||
| sysfs-driver-qla2xxx | ||
| sysfs-driver-usb-usbtmc | ||
| sysfs-driver-w1_ds28e04 | ||
| sysfs-firmware-efi-vars | ||
| sysfs-firmware-opal-dump | ||
| sysfs-firmware-opal-elog | ||
| sysfs-module | ||
| sysfs-transport-srp | ||
| thermal-notification | ||
| vdso | ||