Rafał Miłecki
0f247626cb
usb: core: Introduce a USB port LED trigger ...
This commit adds a new trigger responsible for turning on LED when USB
device gets connected to the selected USB port. This can can useful for
various home routers that have USB port(s) and a proper LED telling user
a device is connected.
The trigger gets its documentation file but basically it just requires
enabling it and selecting USB ports (e.g. echo 1 > ports/usb1-1).
There was a long discussion on design of this driver. Its current state
is a result of picking them most adjustable solution as others couldn't
handle all cases.
1) It wasn't possible for the driver to register separated trigger for
each USB port. Some physical USB ports are handled by more than one
controller and so by more than one USB port. E.g. USB 2.0 physical
port may be handled by OHCI's port and EHCI's port.
It's also not possible to assign more than 1 trigger to a single LED
and implementing such feature would be tricky due to syncing triggers
and sysfs conflicts with old triggers.
2) Another idea was to register trigger per USB hub. This wouldn't allow
handling devices with multiple USB LEDs and controllers (hubs)
controlling more than 1 physical port. It's common for hubs to have
few ports and each may have its own LED.
This final trigger is highly flexible. It allows selecting any USB ports
for any LED. It was also modified (comparing to the initial version) to
allow choosing ports rather than having user /guess/ proper names. It
was successfully tested on SmartRG SR400ac which has 3 USB LEDs,
2 physical ports and 3 controllers.
It was noted USB subsystem already has usb-gadget and usb-host triggers
but they are pretty trivial ones. They indicate activity only and can't
have ports specified.
In future it may be good idea to consider adding activity support to
usbport as well. This should allow switching to this more generic driver
and maybe marking old ones as obsolete.
This can be implemented with another sysfs file for setting mode. The
default mode wouldn't change so there won't be ABI breakage and so such
feature can be safely implemented later.
There was also an idea of supporting other devices (PCI, SDIO, etc.) but
as this driver already contains some USB specific code (and will get
more) these should be probably separated drivers (triggers).
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-09-27 12:20:17 +02:00
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2016-09-10 09:58:52 -07:00
Revert "android: binder: fix dangling pointer comparison"
2016-08-18 17:21:37 +02:00
pata_ninja32: Avoid corrupting status flags
2016-08-30 11:59:47 -04:00
PM / runtime: Use _rcuidle for runtime suspend tracepoints
2016-09-16 02:59:58 +02:00
Revert "floppy: refactor open() flags handling"
2016-08-25 08:56:51 -06:00
arm-cci: pmu: Fix typo in event name
2016-09-07 21:24:42 -07:00
virtio: fixes for 4.8
2016-09-09 14:52:05 -07:00
Clock Fixes for the Allwinner SoCs, 4.8 Edition
2016-09-08 12:54:24 -07:00
clocksource/drivers/atmel-pit: Fix compilation error
2016-08-29 09:51:39 +02:00
cpufreq: dt: Add terminate entry for of_device_id tables
2016-08-31 02:49:05 +02:00
powerpc updates for 4.8 # 1
2016-07-30 21:01:36 -07:00
crypto: caam - fix IV loading for authenc (giv)decryption
2016-08-31 22:50:42 +08:00
dax: fix mapping size check
2016-09-03 10:40:57 -07:00
dmaengine: img-mdc: fix a possible NULL dereference
2016-08-22 11:57:49 +05:30
EDAC, skx_edac: Add EDAC driver for Skylake
2016-08-21 10:58:34 -07:00
Merge branch 'next' into resolution
2016-09-15 16:45:20 +05:30
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-09-13 12:02:00 -07:00
drivers/fpga/Kconfig: fix build failure
2016-08-04 08:50:07 -04:00
gpio: sa1100: fix irq probing for ucb1x00
2016-09-08 00:42:57 +02:00
This pull request brings in a fix for crashes in X on VC4.
2016-09-17 07:57:55 +10:00
hwmon: (it87) Add missing sysfs attribute group terminator
2016-08-29 05:31:31 -07:00
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-07-29 13:55:30 -07:00
i2c: rk3x: Restore clock settings at resume time
2016-09-08 22:50:33 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide
2016-07-29 13:29:06 -07:00
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-07-30 12:56:26 -07:00
Second set of IIO fixes for the 4.8 cycle.
2016-09-09 13:44:37 +02:00
Round three of 4.8 rc fixes
2016-09-16 13:51:42 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2016-08-26 18:36:23 -07:00
Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes
2016-08-22 12:33:56 +02:00
irqchip/atmel-aic: Fix potential deadlock in ->xlate()
2016-09-13 16:57:40 +02:00
powerpc updates for 4.8 # 1
2016-07-30 21:01:36 -07:00
drivers/macintosh: Delete owner assignment
2016-08-22 11:09:33 +10:00
fix 📫 bcm-pdc-mailbox:mark symbols static where possible
2016-08-29 18:43:39 +05:30
Merge tag 'md/4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2016-09-13 11:19:52 -07:00
media: usb: zr364xx: zr364xx: don't print error when allocating urb fails
2016-08-30 19:13:55 +02:00
memory: omap-gpmc: allow probe of child nodes to fail
2016-08-08 11:18:40 +03:00
memstick: don't allocate unused major for ms_block
2016-08-02 17:31:41 -04:00
ARM: SoC driver updates for v4.8
2016-08-01 18:36:01 -04:00
lkdtm: adjust usercopy tests to bypass const checks
2016-09-06 12:17:30 -07:00
mmc: omap: Initialize dma_slave_config to avoid random data in it's fields
2016-09-14 13:59:33 +02:00
This pull request contains mostly cleanups and minor
2016-08-04 19:51:49 -04:00
net/mlx4_en: Fix panic on xmit while port is down
2016-09-11 19:40:26 -07:00
NTB: ntb_hw_intel: use local variable pdev
2016-08-05 10:34:13 -04:00
libnvdimm: allow legacy (e820) pmem region to clear bad blocks
2016-09-09 17:34:46 -07:00
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
2016-09-15 13:22:59 -07:00
of: fix reference counting in of_graph_get_endpoint_by_regs
2016-08-15 11:15:05 -05:00
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
PCI updates for v4.8:
2016-09-14 14:06:30 -07:00
pcmcia: lubbock: fix sockets configuration
2016-09-12 10:57:01 +01:00
drivers/perf: arm_pmu: Fix NULL pointer dereference during probe
2016-09-02 17:17:52 +01:00
phy-twl4030-usb: initialize charging-related stuff via pm_runtime
2016-09-14 10:59:12 +05:30
pinctrl: sunxi: fix uart1 CTS/RTS pins at PG on A23/A33
2016-08-23 12:28:31 +02:00
intel_pmic_gpio: Make explicitly non-modular
2016-08-28 22:31:52 -07:00
power_supply: tps65217-charger: fix missing platform_set_drvdata()
2016-08-15 23:10:44 +02:00
pwm: Changes for v4.8-rc1
2016-08-06 00:01:33 -04:00
rapidio/tsi721: fix incorrect detection of address translation condition
2016-09-01 17:52:02 -07:00
Merge remote-tracking branches 'regulator/fix/email' and 'regulator/fix/qcom-smd' into regulator-linus
2016-09-06 12:31:34 +01:00
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
RTC for 4.8
2016-08-05 09:48:22 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2016-08-16 15:50:22 -07:00
SCSI fixes on 20160906
2016-09-06 11:06:52 -07:00
ARM: SoC driver updates for v4.8
2016-08-01 18:36:01 -04:00
Merge remote-tracking branches 'spi/fix/lock', 'spi/fix/maintainers', 'spi/fix/put', 'spi/fix/pxa2xx', 'spi/fix/sh-msiof' and 'spi/fix/timeout' into spi-linus
2016-09-06 12:32:09 +01:00
First round of IIO fixes for the 4.8 cycle.
2016-08-23 17:39:31 -04:00
target: iblock_execute_sync_cache() should use bio_set_op_attrs()
2016-08-07 14:41:02 -06:00
thermal: rcar_thermal: Fix priv->zone error handling
2016-09-06 20:46:06 +08:00
thunderbolt: Don't declare Falcon Ridge unsupported
2016-08-31 13:25:02 +02:00
serial: 8250: added acces i/o products quad and octal serial cards
2016-08-31 16:28:26 +02:00
usb: core: Introduce a USB port LED trigger
2016-09-27 12:20:17 +02:00
uwb: hwa-rc: don't print error when allocating urb fails
2016-08-15 15:52:40 +02:00
vfio/pci: Fix NULL pointer oops in error interrupt setup handling
2016-08-08 16:16:23 -06:00
vhost/scsi: fix reuse of &vq->iov[out] in response
2016-08-23 17:16:57 +03:00
dma-mapping: use unsigned long for dma_attrs
2016-08-04 08:50:07 -04:00
virtio: mark vring_dma_dev() static
2016-09-09 21:12:35 +03:00
w1:omap_hdq: fix regression
2016-08-02 19:35:40 -04:00
watchdog: pcwd_usb: don't print error when allocating urb fails
2016-08-30 19:13:55 +02:00
xenbus: don't look up transaction IDs for ordinary writes
2016-08-24 18:16:18 +01:00
virtio/vhost: new features for 4.8
2016-08-06 09:20:13 -04:00
0f247626cb