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2017-07-17w1: omap-hdq: fix error return code in omap_hdq_probe()Gustavo A. R. Silva
platform_get_irq() returns an error code, but the omap_hdq driver ignores it and always returns -ENXIO. This is not correct, and prevents -EPROBE_DEFER from being propagated properly. Notice that platform_get_irq() no longer returns 0 on error. Print error message and propagate the return value of platform_get_irq on failure. Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-07-17w1: Fix slave count on 1-Wire bus (resend)Alex A. Mihaylov
1-Wire bus have very fast algorith for exchange with single slave device. Fix incorrect count of slave devices on connect second slave device. This case on slave device probe() step we need use generic (multislave) functions for read/write device. Signed-off-by: Alex A. Mihaylov <minimumlaw@rambler.ru> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09w1: Add subsystem kernel public interfaceAndrew F. Davis
Like other subsystems we should be able to define slave devices outside of the w1 directory. To do this we move public facing interface definitions to include/linux/w1.h and rename the internal definition file to w1_internal.h. As w1_family.h and w1_int.h contained almost entirely public driver interface definitions we simply removed these files and moved the remaining definitions into w1_internal.h. With this we can now start to move slave devices out of w1/slaves and into the subsystem based on the function they implement, again like other drivers. Signed-off-by: Andrew F. Davis <afd@ti.com> Reviewed-by: Sebastian Reichel <sre@kernel.org> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-05-25w1: Organize driver source to natural/common orderAndrew F. Davis
Structures and functions should be ordered such that forward declaration use is minimized. MODULE_* macros should immediately follow the structures and functions upon which they act. Remaining MODULE_* macros should be at the end of the file in alphabetical order. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08w1: Remove unneeded use of assert() and remove w1_log.hAndrew F. Davis
The only use of assert() is in matrox_w1.c and is used to check the input to probe() from the PCI subsystem for NULL values, these are guaranteed to be populated and no other PCI driver makes this check, remove this. As this was the only definition in w1_log.h, remove this also. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-04-08w1: Use kernel common min() implementationAndrew F. Davis
Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-17w1: w1_ds2760.h: fix defines indentationMariusz Bialonczyk
Signed-off-by: Mariusz Bialonczyk <manio@skyboo.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-17w1: add support for DS2438 Smart Battery MonitorMariusz Bialonczyk
Detailed information about support and provided sysfs files in my next commit which creates a documentation file: Documentation/w1/slaves/w1_ds2438 Signed-off-by: Mariusz Bialonczyk <manio@skyboo.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar
<linux/sched/signal.h> We are going to split <linux/sched/signal.h> out of <linux/sched.h>, which will have to be picked up from other headers and a couple of .c files. Create a trivial placeholder <linux/sched/signal.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-10w1: ds2405: use module_w1_family to simplify the codeWei Yongjun
module_w1_family() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-02-10w1: ds2490: use kmemdup rather than duplicating its implementationWei Yongjun
Use kmemdup rather than duplicating its implementation. Generated by: scripts/coccinelle/api/memdup.cocci Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-25w1: Fixup source file headersAndrew F. Davis
Remove filename from file, this is not done anymore as it doesn't add anything and usually is incorrect as filename change often. Also shorten the GPL to the more common address-less version and remove excess white-space. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-25w1: don't leak refcount on slave attach failure in w1_attach_slave_device()Maciej S. Szmigiero
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 <mail@maciej.szmigiero.name> Cc: stable@vger.kernel.org Fixes: 9fcbbac5ded489 ("w1: process w1 netlink commands in w1_process thread") Cc: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-25w1: add DS2405 addressable switch driverMaciej S. Szmigiero
This adds a driver for a DS2405 1-wire single-channel addressable switch. The DS2405 can also work as a single-channel binary remote sensor. This driver supports two attributes: "state" and "output" which are the same attribute names as supported by existing DS2406, DS2408 and DS2413 drivers. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-25w1: ds2490: USB transfer buffers need to be DMAableMaciej S. Szmigiero
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 <mail@maciej.szmigiero.name> Cc: stable <stable@vger.kernel.org> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-01-25w1: omap_hdq: Free resources on error pathChristophe JAILLET
In case of error returned by '_omap_hdq_reset()', free resources as done elsewhere in this function. This patch slighly changes the semantic of the code. It now propagates the error code returned by '_omap_hdq_reset()' instead of returning -EINVAL unconditionally. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31w1: fix timeout_us parameter descriptionWei Yongjun
Fix 'timeout_us' parameter description. Signed-off-by: Wei Yongjun <weiyj.lk@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31drivers: w1: style corrections-pointers-blanklines-comparisonsBen Werbowyj
Correct pointer notations to include whitespace between variable type and "*" character. Inserted blank line after variable declatations at two locations. Rearranged comparison within an if statment to have the constant on the right-hand side. Signed-off-by: Ben Werbowyj <ben.werbowyj@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31drivers: w1: removed assignment from within if statementBen Werbowyj
Assignment of variable count removed from within an if statment. This was done at two locations in the file. Signed-off-by: Ben Werbowyj <ben.werbowyj@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-31drivers: w1: style corrections for parenthesis and bracesBen Werbowyj
Inserted whitespace between command and open parenthesis at two locations. Removed new line between open brace and command/declaration at two locations. Signed-off-by: Ben Werbowyj <ben.werbowyj@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-08-02w1:omap_hdq: fix regressionH. Nikolaus Schaller
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 <hns@goldelico.com> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02w1: add helper macro module_w1_familyAndrew F. Davis
The helper macro module_w1_family can be used in module drivers that only register a w1 driver in their module init functions. Add this macro and use it in all applicable drivers. Link: http://lkml.kernel.org/r/20160531204313.20979-2-afd@ti.com Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-08-02w1: remove need for ida and use PLATFORM_DEVID_AUTOAndrew F. Davis
PLATFORM_DEVID_AUTO can be used to have the platform core assign a unique ID instead of manually creating one with IDA. Do this in all applicable drivers. Link: http://lkml.kernel.org/r/20160531204313.20979-1-afd@ti.com Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-01w1: add ability to set (SRAM) and store (EEPROM) configuration for temp ↵Ben Sen
sensors like DS18B20 Since many temperature sensors come "preconfigured" with a lower precision, people are stuck at that precision when running on a kernel based device (unlike the Dallas 1Wire library for e.g. Arduino, which supports writing the configuration/scratchpad). This patch adds write support for the scratchpad/precision registers via w1_slave sysfs. Signed-off-by: Ben Sen <0.x29a.0@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-01w1: silence an uninitialized variable warningDan Carpenter
If kstrtoint() returns -ERANGE then "tmp" is uninitialized. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Evgeniy Polaykov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-01w1: Spelling s/minmum/minimum/Geert Uytterhoeven
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-05-01w1: enable active pullup for DS2482 by defaultMariusz Bialonczyk
This commit enables the active pullup (APU bit) by default for the DS2482 1-Wire master. >From the DS2482 datasheet: "The APU bit controls whether an active pullup (controlled slew-rate transistor) or a passive pullup (Rwpu resistor) will be used to drive a 1-Wire line from low to high. When APU = 0, active pullup is disabled (resistor mode). Active Pullup should always be selected unless there is only a single slave on the 1-Wire line." According to the module author, Ben Gardner: "It doesn't look like active pullup would cause any hurt if there is only a single slave." And my tests with multiple and single slaves on 1-Wire bus confirms that. This active pullup can be manually disabled using the introduced module parameter: active_pullup = 0 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-11w1: w1_process() is not freezable kthreadJiri Kosina
w1_process() calls try_to_freeze(), but the thread doesn't mark itself freezable through set_freezable(), so the try_to_freeze() call is useless. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-08omap_hdq: fix usecount handlingAndreas Kemnade
hdq_usecount was set to zero after a successful read, so omap_hdq_put could not properly free resources which leads e.g. to increasing usecounts in lsmod output Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Reviewed-by: Vignesh R <vigneshr@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-11-05Merge tag 'for-v4.4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply 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() ...
2015-10-17W1: w1-gpio - switch to using dev_pm_opsDmitry Torokhov
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 <dmitry.torokhov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-05w1: masters: omap_hdq: add support for 1-wire modeVignesh R
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 <vigneshr@ti.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Jonathan Corbet <corbet@lwn.net> CC: Tony Lindgren <tony@atomide.com> Cc: Vignesh R <vigneshr@ti.com> Cc: NeilBrown <neilb@suse.de> Cc: Fabian Frederick <fabf@skynet.be> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-05drivers/w1/w1_int.c: call put_device if device_register failsLevente Kurusa
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 <levex@linux.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-23power: bq27xxx_battery: Platform initialization must declare a deviceAndrew F. Davis
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 <afd@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-23power: bq27x00_battery: Renaming for consistencyAndrew F. Davis
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 <afd@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: GUAN Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-01Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 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 ...
2015-08-07w1: Fix typo in MODULE_DESCRIPTION in matrox_w1.cMasanari Iida
This patch fix spelling typo in matrox_w1.c Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Jiri Kosina <jkosina@suse.com>
2015-08-05w1: Use module_pci_driverVaishali Thakkar
Use module_pci_driver for drivers whose init and exit functions only register and unregister, respectively. A simplified version of the Coccinelle semantic patch that performs this transformation is as follows: @a@ identifier f, x; @@ -static f(...) { return pci_register_driver(&x); } @b depends on a@ identifier e, a.x; @@ -static e(...) { pci_unregister_driver(&x); } @c depends on a && b@ identifier a.f; declarer name module_init; @@ -module_init(f); @d depends on a && b && c@ identifier b.e, a.x; declarer name module_exit; declarer name module_pci_driver; @@ -module_exit(e); +module_pci_driver(x); Signed-off-by: Vaishali Thakkar <vthakkar1994@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-08-05w1: Drop owner assignment from i2c_driverKrzysztof Kozlowski
i2c_driver does not need to set an owner because i2c_register_driver() will set it. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12w1: use correct lock on error in w1_seq_show()Dan Carpenter
I noticed there was a problem here because Smatch complained: drivers/w1/slaves/w1_therm.c:416 w1_seq_show() warn: inconsistent returns 'mutex:&sl->master->mutex'. Locked on: line 416 Unlocked on: line 413 The problem is that we lock ->mutex but we unlock ->bus_mutex on error. David Fries says that ->bus_mutex is correct and ->mutex is incorrect. Fixes: d9411e57dc7f ('w1: Add support for DS28EA00 sequence to w1-therm') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-12w1: fix for loop exit condition in w1_seq_show()Dan Carpenter
The W1_42_FINISHED_BYTE is 0xFF so the cast means the condition is never true. Fixes: d9411e57dc7f ('w1: Add support for DS28EA00 sequence to w1-therm') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-01w1: ds2482: Add i2c module alias nameLudek Hlavacek
Add i2c alias to enable autoloading of the module for device specified in device-tree. Signed-off-by: Ludek Hlavacek <ludek_h@seznam.cz> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-24w1: Add support for DS28EA00 sequence to w1-thermMatt Campbell
This patch provides support for the DS28EA00 digital thermometer. The DS28EA00 provides an additional two pins for implementing a sequence detection algorithm. This feature allows you to determine the physical location of the chip in the 1-wire bus without needing pre-existing knowledge of the bus ordering. Support is provided through the sysfs w1_seq file. The file will contain a single line with an integer value representing the device index in the bus starting at 0. Signed-off-by: Matt Campbell <mattrcampbell@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-24w1_therm reference count family dataDavid Fries
A temperature conversion can take 750 ms and when possible the w1_therm slave driver drops the bus_mutex to allow other bus operations, but that includes operations such as a periodic slave search, which can remove this slave when it is no longer detected. If that happens the sl->family_data will be freed and set to NULL causing w1_slave_show to crash when it wakes up. Signed-off-by: David Fries <David@Fries.net> Reported-By: Thorsten Bschorr <thorsten@bschorr.de> Tested-by: Thorsten Bschorr <thorsten@bschorr.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-24w1: introduce an ability to specify microseconds bus scanning intervalsDmitry Khromov
Some of 1-Wire devices commonly associated with physical access control systems are attached/generate presence for as short as 100 ms - hence the tens-to-hundreds milliseconds scan intervals are required. Signed-off-by: Dmitry Khromov <dk@icelogic.net> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-25w1: constify of_device_id arrayFabian Frederick
of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-12-14Merge tag 'char-misc-3.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here's the big char/misc driver update for 3.19-rc1 Lots of little things all over the place in different drivers, and a new subsystem, "coresight" has been added. Full details are in the shortlog" * tag 'char-misc-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (73 commits) parport: parport_pc, do not remove parent devices early spmi: Remove shutdown/suspend/resume kernel-doc carma-fpga-program: drop videobuf dependency carma-fpga: drop videobuf dependency carma-fpga-program.c: fix compile errors i8k: Fix temperature bug handling in i8k_get_temp() cxl: Name interrupts in /proc/interrupt CXL: Return error to PSL if IRQ demultiplexing fails & print clearer warning coresight-replicator: remove .owner field for driver coresight: fixed comments in coresight.h coresight: fix typo in comment in coresight-priv.h coresight: bindings for coresight drivers coresight: Adding ABI documentation w1: support auto-load of w1_bq27000 module. w1: avoid potential u16 overflow cn: verify msg->len before making callback mei: export fw status registers through sysfs mei: read and print all six FW status registers mei: txe: add cherrytrail device id mei: kill cached host and me csr values ...
2014-12-14Merge tag 'driver-core-3.19-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
2014-11-26w1: support auto-load of w1_bq27000 module.NeilBrown
1/ change request_module call to zero-pad single digit family numbers. This appears to be the intention of the code, but not what it actually does. This means that the alias created for W1_FAMILY_SMEM_01 might actually be useful. 2/ Define a family name for the BQ27000 battery charge monitor. Unfortunately this is the same number as W1_FAMILY_SMEM_01 so if both a compiled on a system, one module might need to be blacklisted. 3/ Add a MODULE_ALIAS for the bq27000. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-26w1: avoid potential u16 overflowDavid Fries
Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: David Fries <David@Fries.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>