diff options
| author | Jens Axboe <axboe@kernel.dk> | 2018-10-01 08:58:57 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-10-01 08:58:57 -0600 |
| commit | c0aac682fa6590cb660cb083dbc09f55e799d2d2 (patch) | |
| tree | 28ded5b660c42661c29e1d4abdeb1a5e92a258ed /drivers/usb/common/common.c | |
| parent | 451bb7c3319739997d2e5a2527aef62d1f9200ac (diff) | |
| parent | 17b57b1883c1285f3d0dc2266e8f79286a7bef38 (diff) | |
Merge tag 'v4.19-rc6' into for-4.20/block
Merge -rc6 in, for two reasons:
1) Resolve a trivial conflict in the blk-mq-tag.c documentation
2) A few important regression fixes went into upstream directly, so
they aren't in the 4.20 branch.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
* tag 'v4.19-rc6': (780 commits)
Linux 4.19-rc6
MAINTAINERS: fix reference to moved drivers/{misc => auxdisplay}/panel.c
cpufreq: qcom-kryo: Fix section annotations
perf/core: Add sanity check to deal with pinned event failure
xen/blkfront: correct purging of persistent grants
Revert "xen/blkfront: When purging persistent grants, keep them in the buffer"
selftests/powerpc: Fix Makefiles for headers_install change
blk-mq: I/O and timer unplugs are inverted in blktrace
dax: Fix deadlock in dax_lock_mapping_entry()
x86/boot: Fix kexec booting failure in the SEV bit detection code
bcache: add separate workqueue for journal_write to avoid deadlock
drm/amd/display: Fix Edid emulation for linux
drm/amd/display: Fix Vega10 lightup on S3 resume
drm/amdgpu: Fix vce work queue was not cancelled when suspend
Revert "drm/panel: Add device_link from panel device to DRM device"
xen/blkfront: When purging persistent grants, keep them in the buffer
clocksource/drivers/timer-atmel-pit: Properly handle error cases
block: fix deadline elevator drain for zoned block devices
ACPI / hotplug / PCI: Don't scan for non-hotplug bridges if slot is not bridge
drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set
...
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/usb/common/common.c')
| -rw-r--r-- | drivers/usb/common/common.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index 50a2362ed3ea..48277bbc15e4 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -246,6 +246,31 @@ int of_usb_update_otg_caps(struct device_node *np, } EXPORT_SYMBOL_GPL(of_usb_update_otg_caps); +/** + * usb_of_get_companion_dev - Find the companion device + * @dev: the device pointer to find a companion + * + * Find the companion device from platform bus. + * + * Takes a reference to the returned struct device which needs to be dropped + * after use. + * + * Return: On success, a pointer to the companion device, %NULL on failure. + */ +struct device *usb_of_get_companion_dev(struct device *dev) +{ + struct device_node *node; + struct platform_device *pdev = NULL; + + node = of_parse_phandle(dev->of_node, "companion", 0); + if (node) + pdev = of_find_device_by_node(node); + + of_node_put(node); + + return pdev ? &pdev->dev : NULL; +} +EXPORT_SYMBOL_GPL(usb_of_get_companion_dev); #endif MODULE_LICENSE("GPL"); |