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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-04 18:34:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-04 18:34:04 -0700
commit29b88e23a9212136d39b0161a39afe587d0170a5 (patch)
tree48d9f857b137222e35f853004973e12a515314f5 /Documentation/ABI
parent2521129a6d2fd8a81f99cf95055eddea3df914ff (diff)
parent4e3a25b0274b8474f5ad46215a270785dd18265e (diff)
Merge tag 'driver-core-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH: "Here's the big driver-core pull request for 3.17-rc1. Largest thing in here is the dma-buf rework and fence code, that touched many different subsystems so it was agreed it should go through this tree to handle merge issues. There's also some firmware loading updates, as well as tests added, and a few other tiny changes, the changelog has the details. All have been in linux-next for a long time" * tag 'driver-core-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits) ARM: imx: Remove references to platform_bus in mxc code firmware loader: Fix _request_firmware_load() return val for fw load abort platform: Remove most references to platform_bus device test: add firmware_class loader test doc: fix minor typos in firmware_class README staging: android: Cleanup style issues Documentation: devres: Sort managed interfaces Documentation: devres: Add devm_kmalloc() et al fs: debugfs: remove trailing whitespace kernfs: kernel-doc warning fix debugfs: Fix corrupted loop in debugfs_remove_recursive stable_kernel_rules: Add pointer to netdev-FAQ for network patches driver core: platform: add device binding path 'driver_override' driver core/platform: remove unused implicit padding in platform_object firmware loader: inform direct failure when udev loader is disabled firmware: replace ALIGN(PAGE_SIZE) by PAGE_ALIGN firmware: read firmware size using i_size_read() firmware loader: allow disabling of udev as firmware loader reservation: add suppport for read-only access using rcu reservation: update api and add some helpers ... Conflicts: drivers/base/platform.c
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+What: /sys/bus/platform/devices/.../driver_override
+Date: April 2014
+Contact: Kim Phillips <kim.phillips@freescale.com>
+Description:
+ This file allows the driver for a device to be specified which
+ will override standard OF, ACPI, ID table, and name matching.
+ When specified, only a driver with a name matching the value
+ written to driver_override will have an opportunity to bind
+ to the device. The override is specified by writing a string
+ to the driver_override file (echo vfio-platform > \
+ driver_override) and may be cleared with an empty string
+ (echo > driver_override). This returns the device to standard
+ matching rules binding. Writing to driver_override does not
+ automatically unbind the device from its current driver or make
+ any attempt to automatically load the specified driver. If no
+ driver with a matching name is currently loaded in the kernel,
+ the device will not bind to any driver. This also allows
+ devices to opt-out of driver binding using a driver_override
+ name such as "none". Only a single driver may be specified in
+ the override, there is no support for parsing delimiters.