linux-toradex.git/drivers/w1, branch v4.4.93

w1: ds2490: USB transfer buffers need to be DMAable

2017-03-12T05:37:29+00:00

commit 61cd1b4cd1e8f7f7642ab64529d9bd52e8374641 upstream.

ds2490 driver was doing USB transfers from / to buffers on a stack.
This is not permitted and made the driver non-working with vmapped stacks.

Since all these transfers are done under the same bus_mutex lock we can
simply use shared buffers in a device private structure for two most common
of them.

While we are at it, let's also fix a comparison between int and size_t in
ds9490r_search() which made the driver spin in this function if state
register get requests were failing.

Signed-off-by: Maciej S. Szmigiero 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

w1: don't leak refcount on slave attach failure in w1_attach_slave_device()

2017-03-12T05:37:28+00:00

commit d2ce4ea1a0b0162e5d2d7e7942ab6f5cc2063d5a upstream.

Near the beginning of w1_attach_slave_device() we increment a w1 master
reference count.
Later, when we are going to exit this function without actually attaching
a slave device (due to failure of __w1_attach_slave_device()) we need to
decrement this reference count back.

Signed-off-by: Maciej S. Szmigiero 
Fixes: 9fcbbac5ded489 ("w1: process w1 netlink commands in w1_process thread")
Cc: Evgeniy Polyakov 
Signed-off-by: Greg Kroah-Hartman

w1:omap_hdq: fix regression

2016-08-20T16:09:22+00:00

commit ecfaf0c42fc4306b5ec4bf6be01b66f8fe9a9733 upstream.

Commit e93762bbf681 ("w1: masters: omap_hdq: add support for 1-wire
mode") added a statement to clear the hdq_irqstatus flags in
hdq_read_byte().

If the hdq reading process is scheduled slowly or interrupts are
disabled for a while the hardware read activity might already be
finished on entry of hdq_read_byte().  And hdq_isr() already has set the
hdq_irqstatus to 0x6 (can be seen in debug mode) denoting that both, the
TXCOMPLETE and RXCOMPLETE interrupts occurred in parallel.

This means there is no need to wait and the hdq_read_byte() can just
read the byte from the hdq controller.

By resetting hdq_irqstatus to 0 the read process is forced to be always
waiting again (because the if statement always succeeds) but the
hardware will not issue another RXCOMPLETE interrupt.  This results in a
false timeout.

After such a situation the hdq bus hangs.

Link: http://lkml.kernel.org/r/b724765f87ad276a69625bc19806c8c8844c4590.1469513669.git.hns@goldelico.com
Signed-off-by: H. Nikolaus Schaller 
Cc: Evgeniy Polyakov 
Cc: Greg Kroah-Hartman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

2015-11-05T20:28:15+00:00

Pull power supply and reset updates from Sebastian Reichel:
 - new AXP20X USB Power driver
 - new Qualcomm SMBB driver
 - new TPS65217 Charger driver
 - BQ24257: add BQ24250/BQ24251 support
 - overhaul bq27x00 battery driver, rename to bq27xxx
 - misc fixes and cleanups

* tag 'for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (54 commits)
  power: bq27xxx_battery: Remove unneeded dependency in Kconfig
  power: bq27xxx_battery: move irq handler to i2c section
  power: bq27xxx_battery: fix platform probe
  twl4030_charger: add missing iio dependency
  power_supply: charger-manager: add missing of_node_put
  Documentation: power: bq24257: Document exported sysfs entries
  power: bq24257: Add various device-specific sysfs properties
  power: bq24257: Allow input current limit sysfs access
  power: bq24257: Add input DPM voltage threshold setting support
  power: bq24257: Add over voltage protection setting support
  power: bq24257: Add SW-based approach for Power Good determination
  power: bq24257: Allow manual setting of input current limit
  power: bq24257: Add bit definition for temp sense enable
  power: bq24257: Add basic support for bq24250/bq24251
  dt: power: bq24257-charger: Cover additional devices
  power: bq24257: Simplify bq24257_power_supply_init()
  power: bq24257: Use managed power supply register
  power: bq24257: Streamline input current limit setup
  power: bq24257: Remove IRQ config through stat-gpios
  power: bq27xxx_battery: fix signedness bug in bq27xxx_battery_read_health()
  ...

W1: w1-gpio - switch to using dev_pm_ops

2015-10-18T04:45:05+00:00

Let's stop using legacy platform driver hooks for power management and
switch to using the standard dev_pm_ops-based hooks.

Also, instead of guarding PM methods with #ifdef CONFIG_PM annotate them
as __maybe_unused as it provides better compile coverage.

Signed-off-by: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

w1: masters: omap_hdq: add support for 1-wire mode

2015-10-05T03:47:09+00:00

This patches makes following changes to omap_hdq driver
 - Enable 1-wire mode.
 - Implement w1_triplet callback to facilitate search rom
   procedure and auto detection of 1-wire slaves.
 - Proper enabling and disabling of interrupt.
 - Cleanups (formatting and return value checks).

HDQ mode remains unchanged.

Signed-off-by: Vignesh R 
Cc: Rob Herring 
Cc: Pawel Moll 
Cc: Mark Rutland 
Cc: Ian Campbell 
Cc: Kumar Gala 
Acked-by: Evgeniy Polyakov 
Cc: Jonathan Corbet 
CC: Tony Lindgren 
Cc: Vignesh R 
Cc: NeilBrown 
Cc: Fabian Frederick 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

drivers/w1/w1_int.c: call put_device if device_register fails

2015-10-05T03:47:09+00:00

Currently, memsetting and kfreeing the device is bad behaviour.  The
device will have a reference count of 1 and hence can cause trouble
because it has kfree'd.  Proper way to handle a failed device_register is
to call put_device right after it fails.

Signed-off-by: Levente Kurusa 
Acked-by: Evgeniy Polyakov 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

power: bq27xxx_battery: Platform initialization must declare a device

2015-09-23T14:23:12+00:00

When initialized as a platform device the initializer must now specify
a device. An empty device name is no longer valid.

Signed-off-by: Andrew F. Davis 
Signed-off-by: Sebastian Reichel

power: bq27x00_battery: Renaming for consistency

2015-09-23T14:16:22+00:00

Rename functions that are used by multiple devices. New devices
have been added and the function names and driver name are no longer
general enough for the functionality they provide.

Signed-off-by: Andrew F. Davis 
Acked-by: Tony Lindgren 
Acked-by: GUAN Xuetao 
Signed-off-by: Sebastian Reichel

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

2015-09-02T01:46:42+00:00

Pull trivial tree updates from Jiri Kosina:
 "The usual stuff from trivial tree for 4.3 (kerneldoc updates, printk()
  fixes, Documentation and MAINTAINERS updates)"

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits)
  MAINTAINERS: update my e-mail address
  mod_devicetable: add space before */
  scsi: a100u2w: trivial typo in printk
  i2c: Fix typo in i2c-bfin-twi.c
  treewide: fix typos in comment blocks
  Doc: fix trivial typo in SubmittingPatches
  proportions: Spelling s/consitent/consistent/
  dm: Spelling s/consitent/consistent/
  aic7xxx: Fix typo in error message
  pcmcia: Fix typo in locking documentation
  scsi/arcmsr: Fix typos in error log
  drm/nouveau/gr: Fix typo in nv10.c
  [SCSI] Fix printk typos in drivers/scsi
  staging: comedi: Grammar s/Enable support a/Enable support for a/
  Btrfs: Spelling s/consitent/consistent/
  README: GTK+ is a acronym
  ASoC: omap: Fix typo in config option description
  mm: tlb.c: Fix error message
  ntfs: super.c: Fix error log
  fix typo in Documentation/SubmittingPatches
  ...