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* w1: select crc16 library for ds2406Arnd Bergmann2014-06-231-0/+1
| | | | | | | | | | | | | commit 94859308a21b "w1: new w1_ds2406 driver" added a new driver that uses the crc16 library, but didn't ensure that the core is there. This adds the necessary Kconfig statements, just like we have it for other w1 drivers. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Scott Alfter <scott@alfter.us> Cc: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1/slaves: use pr_* instead of printkFjodor Schelichow2014-06-191-2/+1
| | | | | | | | | | | | | | This patch replaces all calls to the "printk" function within the "slaves" subdirectory by calls to the appropriate "pr_*" function thus addressing the following warning generated by the checkpatch script: WARNING: Prefer [subsystem eg: netdev]_err([subsystem]dev, ... then dev_err(dev, ... then pr_err(... to printk(KERN_ERR ... Signed-off-by: Fjodor Schelichow <fjodor.schelichow@hotmail.com> Signed-off-by: Roman Sommer <romsom2@yahoo.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: new w1_ds2406 driverScott Alfter2014-06-193-0/+176
| | | | | | | | | | | | | Some preliminary work at making use of this driver led me to implement CRC-16 checks on read and write to deal with the occasional glitchiness of the 1-Wire bus. The revised driver (attached) returns an I/O error if the CRC check fails. When reading the chip's state, either you get a valid indication or you get an I/O error. When changing its state, either the change is successful or an I/O error is returned. Signed-off-by: Scott Alfter <scott@alfter.us> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: Remove excess dependencies on W1 for masters and slavesAlexander Shiyan2014-02-281-5/+0
| | | | | | | | Configuration for masters and slaves is included only if W1 symbol enabled, so no reason to check it once more. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: use family_data instead of rom in w1_slaveDavid Fries2014-02-071-2/+19
| | | | | | | | | | | | | | The first line printed from w1_slave gives the context of the w1 device. So does the second line, but if the CRC check failed, the second line contains the last successful result. It is confusing when it prints the temperature next to the line that might be a previous conversion and has nothing to do with that printed temperature value. Modify the code to store the last good conversion in family_data, which is designed for custom data structures. Signed-off-by: David Fries <David@Fries.net> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2781: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-18/+18
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2760: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-17/+18
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2780: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-18/+18
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds28e04: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-70/+42
| | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2433: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-25/+22
| | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2431: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-24/+19
| | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2423: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-18/+9
| | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2413.c: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-50/+22
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Mariusz Bialonczyk <manio@skyboo.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_ds2408: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-122/+52
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: slaves: w1_therm: convert to use w1_family_ops.groupsGreg Kroah-Hartman2013-08-221-15/+9
| | | | | | | | | | | This moves the sysfs file creation/removal to the w1 core by using the .groups field, saving code in the slave driver. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Cc: David Stevenson <david@avoncliff.com> Cc: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Cc: Michael Arndt <michael@scriptkiller.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test modeJean-Francois Dagenais2013-07-031-0/+30
| | | | | | | | | | | | | | | | | | | | | | | | Power-up timing The DS2408 is sensitive to the power-on slew rate and can inadvertently power up with a test mode feature enabled. When this occurs, the P0 port does not respond to the Channel Access Write command. For most reliable operation, it is recommended to disable the test mode after every power-on reset using the Disable Test Mode sequence shown below. The 64-bit ROM code must be transmitted in the same bit sequence as with the Match ROM command, i.e., least significant bit first. This precaution is recommended in parasite power mode (VCC pin connected to GND) as well as with VCC power. Disable Test Mode: RST,PD,96h,<64-bit DS2408 ROM Code>,3Ch,RST,PD [akpm@linux-foundation.org: don't use kerenldoc token to introduce a non-kerneldoc comment, tweak whitespace] Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Cc: 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>
* w1: add family based automatic module loadingAlexander Stein2013-06-0311-0/+16
| | | | | | | | | This patch allows the 1-wire bus to autoload the corresponding module for each slave being attached. This works similar to bluetooth protocols. Signed-off-by: Alexander Stein <alexander.stein@informatik.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drivers/w1/slaves/w1_ds2760.c: fix the error handling in w1_ds2760_add_slave()Wei Yongjun2013-04-301-1/+2
| | | | | | | | | | | | | Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/w1/slaves/w1_ds2781.c: fix the error handling in w1_ds2781_add_slave()Wei Yongjun2013-04-301-1/+2
| | | | | | | | | | | | | Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/w1/slaves/w1_ds2780.c: fix the error handling in w1_ds2780_add_slave()Wei Yongjun2013-04-301-1/+2
| | | | | | | | | | | | | Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fail, and platform_device_del() should be used in the error handling case after platform_device_add() success. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/w1/slaves/w1_bq27000.c: fix the error handling in w1_bq27000_add_slave()Wei Yongjun2013-04-301-1/+3
| | | | | | | | | | | | | Use platform_device_put() instead of platform_device_unregister() if platform_device_add() fails, and also add the return value check of platform_device_add_data(). Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Greg KH <greg@kroah.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: ds2408: use ARRAY_SIZE instead of hard-coded numberJean-Francois Dagenais2013-03-151-4/+3
| | | | | | Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: ds2408: make value read-back check a Kconfig optionJean-Francois Dagenais2013-03-152-6/+22
| | | | | | | | | De-activating this reading back will effectively half the time required for a write to the output register. Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: add support for DS2413 Dual Channel Addressable SwitchMariusz Bialonczyk2013-02-273-5/+188
| | | | | | | | | | Also fixes some whitespace inconsistency in Kconfig and w1_family.h when DS2408 chip support was added. Signed-off-by: Mariusz Bialonczyk <manio@skyboo.net> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: w1_therm: Add force-pullup option for "broken" sensorsMichael Arndt2013-02-181-1/+10
| | | | | | Signed-off-by: Michael Arndt <michael@scriptkiller.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1_therm: Retries: remove old code add CRCDavid Stevenson2013-01-151-19/+6
| | | | | | | | | | | | | w1_therm includes some obsolete code to detect bad_roms, this is no longer relevant. The retry code is only used for this bad_rom test, however there is a CRC check that detects a bad read, but does not trigger a retry. This patch removes all the bad_rom code and uses the CRC check to trigger retries. Signed-off-by: David Stevenson <david@avoncliff.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* 1-Wire: Add support for the maxim ds1825 temperature sensorRaphael Assenat2012-08-161-0/+9
| | | | | | | This patch adds support for maxim ds1825 based 1-wire temperature sensors. Signed-off-by: Raphael Assenat <raph@8d.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: Add 1-wire slave device driver for DS28E04-100Markus Franke2012-06-133-0/+483
| | | | | Signed-off-by: Markus Franke <franm@hrz.tu-chemnitz.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* W1: split master mutex to avoid deadlocks.NeilBrown2012-06-1311-73/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'mutex' in struct w1_master is use for two very different purposes. Firstly it protects various data structures such as the list of all slaves. Secondly it protects the w1 buss against concurrent accesses. This can lead to deadlocks when the ->probe code called while adding a slave needs to talk on the bus, as is the case for power_supply devices. ds2780 and ds2781 drivers contain a work around to track which process hold the lock simply to avoid this deadlock. bq27000 doesn't have that work around and so deadlocks. There are other possible deadlocks involving sysfs. When removing a device the sysfs s_active lock is held, so the lock that protects the slave list must take precedence over s_active. However when access power_supply attributes via sysfs, the s_active lock must take precedence over the lock that protects accesses to the bus. So to avoid deadlocks between w1 slaves and sysfs, these must be two separate locks. Making them separate means that the work around in ds2780 and ds2781 can be removed. So this patch: - adds a new mutex: "bus_mutex" which serialises access to the bus. - takes in mutex in w1_search and ds1wm_search while they access the bus for searching. The mutex is dropped before calling the callback which adds the slave. - changes all slaves to use bus_mutex instead of mutex to protect access to the bus - removes w1_ds2790_io_nolock and w1_ds2781_io_nolock, and the related code from drivers/power/ds278[01]_battery.c which calls them. Signed-off-by: NeilBrown <neilb@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Revert "w1: introduce a slave mutex for serializing IO"Greg Kroah-Hartman2012-06-131-2/+2
| | | | | | | | | | | | This reverts commit 59d4467be405316916a4087d5b02d99196eeef04. Turns out it was the wrong version, will apply the correct version after this. Reported-by: NeilBrown <neilb@suse.de> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: introduce a slave mutex for serializing IONeilBrown2012-06-121-2/+2
| | | | | | | | | | | | | | | | | | | | w1 devices need a mutex to serial IO. Most use master->mutex. However that is used for other purposes and they can conflict. In particular master->mutex is held while w1_attach_slave_device is called. For bq27000, this registers a 'powersupply' device which tries to read the current status. The attempt to read will cause a deadlock on master->mutex. So create a new per-slave mutex and use that for serializing IO for bq27000. Signed-off-by: NeilBrown <neilb@suse.de> Cc: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: w1_ds2408.c: quite sparse noise about using plaing integer as NULL pointerH Hartley Sweeten2012-05-041-2/+0
| | | | | | | | | NULL not 0 should be used with pointers. Just remove the offending lines since they will default to NULL anyway. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Revert "w1: Add 1-wire slave device driver for DS28E04-100"Greg Kroah-Hartman2012-04-293-472/+0
| | | | | | | | | | | This reverts commit f19420c1acb0b573c88a12deb2d42035e22d4a17. It contained lots of errors and warnings and shouldn't have ever been applied, that was my fault, sorry. Cc: Markus Franke <markus.franke@s2002.tu-chemnitz.de> Cc: Evgeniy Polyakov <zbr@ioremap.net>, Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: w1_ds28e04: unlock on error path in w1_f1C_write_pio()Dan Carpenter2012-04-181-1/+3
| | | | | | | | We should unlock here before returning. 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>
* w1: Add 1-wire slave device driver for DS28E04-100Markus Franke2012-04-113-0/+470
| | | | | | | | This patch adds a 1-wire slave device driver for the DS28E04-100. Signed-off-by: Markus Franke <franm@hrz.tu-chemnitz.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave driversRenata Sayakhova2012-03-084-0/+351
| | | | | | Signed-off-by: Renata Sayakhova <rsayakhova@gmail.com> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1_bq27000: Only one thread can access the bq27000 at a time.NeilBrown2012-02-241-0/+2
| | | | | | | | If multiple threads try, they trip over each other badly. Signed-off-by: NeilBrown <neilb@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1_bq27000 - remove w1_bq27000_writeNeilBrown2012-02-241-14/+0
| | | | | | | | | The function is never used so remove it to avoid bit-rot. It can trivially be re-added if there is ever a need. Signed-off-by: NeilBrown <neilb@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1_bq27000: remove unnecessary NULL test.NeilBrown2012-02-241-3/+0
| | | | | | | | | | | | | | | | | As recent change means that we now dereference 'dev' before testing for NULL. That means either the change was wrong, or the test isn't needed. As this function is only called from one driver (bq27x000_battery) and it always passed a non-NULL dev, it seems good to assume that the test isn't needed. So remove it. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NeilBrown <neilb@suse.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* w1: Fix w1_bq27000NeilBrown2012-02-151-5/+12
| | | | | | | | | | | | | | | | | | | | w1_bq27000 adds a bq27000-battery platform device but does not provide platform data for it. This causes the bq27x00 driver to dereference a NULL pointer. So provide the appropriate platform data. This requires modifying w1_bq27000_read so that it find the w1 device as the parent of the bq device. Also there is no point exporting w1_bq27000_read as nothing else uses it or could use it. So make it static. Finally, as there is no way to track how many batteries have been found, and we will probably only find one, use an id number of '-1' to assert that this is a unique instance. Signed-off-by: NeilBrown <neilb@suse.de> Tested-by: Thomas Weber <weber@corscience.de> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* W1: w1_therm: release the bus during conversion on externally powered devicesMaciej Szmigiero2011-11-171-5/+31
| | | | | | | | | | | | | | | | | | | | | | | | w1_therm devices can either be bus powered or externally powered. When device is bus powered during temperature conversion the bus have to be left high to provide necessary power. Some masters also allow strong power-up to be enabled in this case. Naturally, no communication over bus can occur during that time. However, if device has external power then there is no such restriction, and host can talk to other devices during temperature conversion. There is command which allows us to check how device is powered, this patch uses it to release the bus on externally w1_therm powered devices during temperature conversion. Also, this changes uninterruptible sleeps there into interruptible ones to avoid long uninterruptible sleep if w1 subsystem happens to grab bus for scan during w1_therm_read(). Signed-off-by: Maciej Szmigiero <mhej@o2.pl> Acked-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* drivers/power/ds2780_battery.c: add a nolock function to w1 interfaceClifton Barnes2011-11-022-13/+37
| | | | | | | | | | | | Adds a nolock function to the w1 interface to avoid locking the mutex if needed. Signed-off-by: Clifton Barnes <cabarnes@indesign-llc.com> Cc: Evgeniy Polyakov <zbr@ioremap.net> Cc: <stable@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: ds2760 and ds2780, use ida for id and ida_simple_get() to get itJonathan Cameron2011-11-022-84/+12
| | | | | | | | | | | Straightforward. As an aside, the ida_init calls are not needed as far as I can see needed. (DEFINE_IDA does the same already). Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Cc: Evgeniy Polyakov <zbr@ioremap.net> Acked-by: Clifton Barnes <cabarnes@indesign-llc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* MAINTAINERS: Evgeniy has movedEvgeniy Polyakov2011-08-252-4/+4
| | | | | | Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: fix for loop in w1_f29_remove_slave()Dan Carpenter2011-08-251-1/+1
| | | | | | | | | | | | | The for loop was looking for i <= 0 instead of i >= 0 so this function never did anything. Also we started with i = NB_SYSFS_BIN_FILES instead of "NB_SYSFS_BIN_FILES - 1" which is an off by one bug. Reported-by: Bojan Prtvar <prtvar.b@gmail.com> Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Jean-Franois Dagenais <dagenaisj@sonatest.com> Cc: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/w1/slaves/w1_therm.c: add support for DS28EA00Christian Glindkamp2011-07-261-0/+9
| | | | | | | Signed-off-by: Christian Glindkamp <christian.glindkamp@taskit.de> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: add Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC supportClifton Barnes2011-05-264-0/+360
| | | | | | | | | | | | | | | | | Add support for the Maxim/Dallas DS2780 Stand-Alone Fuel Gauge IC. It was suggested to combine this functionality with the current ds2782 driver. Unfortunately, I'm unable to commit the time to refactoring this driver to that extent and I don't have a platform with the ds2782 part to validate that there are no regression issues by adding this functionality. [akpm@linux-foundation.org: use min_t()] Signed-off-by: Clifton Barnes <cabarnes@indesign-llc.com> Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Ryan Mallon <ryan@bluewatersys.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: add 1-wire (w1) DS2408 8-Channel Addressable Switch supportJean-François Dagenais2011-05-263-0/+410
| | | | | | | | | | | | | | This DS2408 w1 slave driver is not complete for all the features of the chip, but its sufficient if you use it as a simple IO expander. [randy.dunlap@oracle.com: fix w1_ds2408.c printk formats] Signed-off-by: Jean-François Dagenais <dagenaisj@sonatest.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Szabolcs Gyurko <szabolcs.gyurko@tlt.hu> Cc: Matt Reimer <mreimer@vpop.net> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* w1: DS2423 counter driver and documentationMika Laitio2011-01-133-0/+178
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is a 1-wire/w1 DS2423 slave driver for reading the values from all 4 counters available DS2423 devices by using standard w1_slave file. In ds2423 the counters are tied to ram pages 12-15 in and each of those ram-pages. Each of these counter values (and asoociated ram page values) are represented as a own line in w1_slave file. Driver has been tested on mips and x86. usage example: cat /sys/bus/w1/devices/1d-00000009b964/w1_slave 00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2 00 02 00 00 00 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2 00 5a 0e 5f 18 00 00 00 00 0b 28 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=408882778 00 05 00 00 00 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=YES c=5 Patch includes also the documentation. [randy.dunlap@oracle.com: fix ds2423 build, needs to select CRC16] Signed-off-by: Mika Laitio <lamikr@pilppa.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* sysfs: add struct file* to bin_attr callbacksChris Wright2010-05-213-5/+5
| | | | | | | | | This allows bin_attr->read,write,mmap callbacks to check file specific data (such as inode owner) as part of any privilege validation. Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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