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path: root/drivers/watchdog
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2019-01-07watchdog: tqmx86: Fix a couple IS_ERR() vs NULL bugsDan Carpenter1-4/+4
These functions return NULL on error but we accidentally check for IS_ERR() instead. Fixes: e3c21e088f89 ("watchdog: tqmx86: Add watchdog driver for the IO controller") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2019-01-07watchdog: mt7621_wdt/rt2880_wdt: Fix compilation problemNeilBrown2-0/+2
These files need #include <linux/mod_devicetable.h> to compile correctly. Fixes: ac3167257b9f ("headers: separate linux/mod_devicetable.h from linux/platform_device.h") Signed-off-by: NeilBrown <neil@brown.name> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2019-01-01Merge tag 'linux-watchdog-4.21-rc1' of ↵Linus Torvalds13-95/+471
git://www.linux-watchdog.org/linux-watchdog Pull watchdog updates from Wim Van Sebroeck: - add TQ-Systems TQMX86 watchdog driver - add Qualcomm PM8916 watchdog driver - w83627hf_wdt: add quirk for Inves system - renesas_wdt: several improvements and document r8a774c0 support - mena21_wdt, mtx-1: Convert to use GPIO descriptor - bcm281xx, ie6xx_wdt: convert to DEFINE_SHOW_ATTRIBUTE - documentation: add PM usage and kernel-api: don't reference removed functions - update bindings for MT7629 SoC - several small fixes * tag 'linux-watchdog-4.21-rc1' of git://www.linux-watchdog.org/linux-watchdog: (22 commits) watchdog: tqmx86: Add watchdog driver for the IO controller dt-bindings: watchdog: renesas-wdt: Document r8a774c0 support watchdog: docs: kernel-api: don't reference removed functions watchdog: add documentation for PM usage watchdog: mtx-1: Convert to use GPIO descriptor watchdog: mena21_wdt: Convert to GPIO descriptors dt-bindings: watchdog: Add Qualcomm PM8916 watchdog watchdog: Add pm8916 watchdog driver dt-bindings: watchdog: update bindings for MT7629 SoC watchdog: renesas_wdt: don't keep timer value during suspend/resume watchdog: ie6xx_wdt: convert to DEFINE_SHOW_ATTRIBUTE watchdog: bcm281xx: convert to DEFINE_SHOW_ATTRIBUTE watchdog: asm9260_wdt: make array mode_name static, shrinks object size watchdog/hpwdt: Update driver version. watchdog/hpwdt: Do not claim unsupported hardware watchdog/hpwdt: Exclude via blacklist Watchdog: remove outdated comment watchdog: w83627hf_wdt: Add quirk for Inves system watchdog: cpwd: add of_node_put() watchdog: renesas_wdt: don't set divider while watchdog is running ...
2018-12-24watchdog: tqmx86: Add watchdog driver for the IO controllerAndrew Lunn3-0/+139
Some TQ-Systems ComExpress modules have an IO controller with a watchdog timer. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-24watchdog: mtx-1: Convert to use GPIO descriptorLinus Walleij1-10/+9
This converts the MTX-1 driver to grab a GPIO descriptor associated with the device instead of using a resource with a global GPIO number. Augment the driver and the boardfile. Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paul.burton@mips.com> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@linux-mips.org Cc: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Paul Burton <paul.burton@mips.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: mena21_wdt: Convert to GPIO descriptorsLinus Walleij1-37/+36
This drops the old OF API use to look up global GPIO numbers and replace it with the GPIO descriptor API. Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: Johannes Thumshirn <morbidrsa@gmail.com> Cc: Johannes Thumshirn <jth@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: Add pm8916 watchdog driverLoic Poulain3-0/+220
The PM816 module is a versatile PMIC with many diverse functions integrated, including, a watchdog. This watchdog is subcomponent of the PON (Power On) peripheral, in the same way as pwrkey/resin buttons. It works with two timers (2-stages), the first one generates an IRQ to the main SoC (APQ8016/MSM8916), the second one performs the reset. This driver expects the following device hierarchy: [pm8916]->[pm8916-pon]->[pm8916-wdt] It uses the pm8916 regmap to access PM8916 registers. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: renesas_wdt: don't keep timer value during suspend/resumeWolfram Sang1-7/+4
After discussing this mail thread [1] again, we concluded that giving userspace enough time to prepare is our favourite option. So, do not keep the time value when suspended but reset it when resuming. [1] https://patchwork.kernel.org/patch/10252209/ Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: ie6xx_wdt: convert to DEFINE_SHOW_ATTRIBUTEYangtao Li1-13/+3
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: bcm281xx: convert to DEFINE_SHOW_ATTRIBUTEYangtao Li1-13/+3
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog: asm9260_wdt: make array mode_name static, shrinks object sizeColin Ian King1-1/+1
Don't populate the const array mode_name on the stack but instead make it static. Makes the object code smaller by 41 bytes: Before: text data bss dec hex filename 7699 1872 0 9571 2563 drivers/watchdog/asm9260_wdt.o After: text data bss dec hex filename 7594 1936 0 9530 253a drivers/watchdog/asm9260_wdt.o (gcc version 8.2.0 x86_64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog/hpwdt: Update driver version.Jerry Hoemann1-1/+1
Bump version number to reflect recent minor changes. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog/hpwdt: Do not claim unsupported hardwareJerry Hoemann1-0/+1
Do not claim when SSID 0x0289 as the watchdog features are not enabled/validated by the firmware. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-22watchdog/hpwdt: Exclude via blacklistJerry Hoemann1-5/+7
Instead of having explicit if statments excluding devices, use a pci_device_id table of devices to blacklist. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-09watchdog: w83627hf_wdt: Add quirk for Inves systemJean Delvare1-3/+35
On some systems, the NCT6791D comes with a companion chip and the watchdog function is in this companion chip. We must use a different unlocking sequence to access the companion chip. Use DMI strings to identify such system and adjust the unlocking sequence automatically. Signed-off-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-09watchdog: cpwd: add of_node_put()Yangtao Li1-0/+2
use of_node_put() to release the refcount. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-09watchdog: renesas_wdt: don't set divider while watchdog is runningWolfram Sang1-2/+7
The datasheet says we must stop the timer before changing the clock divider. This can happen when the restart handler is called while the watchdog is running. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-12-01kbuild: announce removal of SUBDIRS if usedMasahiro Yamada1-7/+0
SUBDIRS has been kept as a backward compatibility since commit ("[PATCH] kbuild: external module support") in 2002. We do not need multiple ways to do the same thing, so I will remove SUBDIRS after the Linux 5.3 release. I cleaned up in-tree code, and updated the document so that nobody would try to use it. Meanwhile, display the following warning if SUBDIRS is used. Makefile:189: ================= WARNING ================ Makefile:190: 'SUBDIRS' will be removed after Linux 5.3 Makefile:191: Please use 'M=' or 'KBUILD_EXTMOD' instead Makefile:192: ========================================== Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com> # for scx200_docflash.c Acked-by: Guenter Roeck <linux@roeck-us.net> # for scx200_wdt.c
2018-11-17watchdog: npcm: Modify npcm watchdog kconfig arch parameterTomer Maimon1-1/+1
Modify Nuvoton watchdog Kconfig default supported architecture name to ARCH_NPCM7XX because ARCH_NPCM750 architecture name is not supported. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-11-17watchdog: renesas_wdt: Fix typosFabrizio Castro1-2/+2
Do not use "," but ";" to separate instructions. Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-22watchdog: ts4800: release syscon device node in ts4800_wdt_probe()Alexey Khoroshilov1-0/+1
Put syscon device node when it is not needed anymore. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-13watchdog: armada_37xx_wdt: use do_div for u64 divisionMarek Behún1-4/+5
When the driver is built on 32 bit architectures during compile test, the linker complains about "__udivdi3" being undefined. We have to use do_div macro instead of the division operator when dividing u64 value. Signed-off-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-13watchdog: Add support for Armada 37xx CPU watchdogMarek Behún3-0/+399
This adds support for the CPU watchdog found on Marvell Armada 37xx SoCs. There are 4 counters which can be set as CPU watchdog counters. This driver uses the second counter (ID 1, counting from 0) as watchdog counter, and first counter (ID 0) to implement pinging on the second counter without the need to disable it. Since counters IDs 2 and 3 are enabled already before even U-Boot starts, this driver does not use them at all, for example by adding a device tree property for counter selection. Signed-off-by: Marek Behún <marek.behun@nic.cz> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-13watchdog: mpc8xxx: provide boot statusChristophe Leroy1-0/+22
mpc8xxx watchdog driver supports the following platforms: - mpc8xx - mpc83xx - mpc86xx Those three platforms have a 32 bits register which provides the reason of the last boot, including whether it was caused by the watchdog. mpc8xx: Register RSR, bit SWRS (bit 3) mpc83xx: Register RSR, bit SWRS (bit 28) mpc86xx: Register RSTRSCR, bit WDT_RR (bit 11) This patch maps the register as defined in the device tree and updates wdt.bootstatus based on the value of the watchdog related bit. Then the information can be retrieved via the WDIOC_GETBOOTSTATUS ioctl. Hereunder is an example of devicetree for mpc8xx, the Reset Status Register being at offset 0x288: WDT: watchdog@0 { compatible = "fsl,mpc823-wdt"; reg = <0x0 0x10 0x288 0x4>; }; On the mpc83xx, RSR is at offset 0x910 On the mpc86xx, RSTRSCR is at offset 0xe0094 Suggested-by: Radu Rendec <radu.rendec@gmail.com> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> # On mpc885 Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: rza_wdt: Support longer timeoutsChris Brandt1-18/+70
The RZ/A2 watchdog timer extends the clock source options in order to allow for longer timeouts. Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Disable PreTimeout when Timeout is smallerJerry Hoemann1-0/+4
During module install, disable pretimeout if the requested timeout value is not greater than the minimal pretimeout value that is supported by hardware. This makes the module load handling of pretimeout consistent with the ioctl handling of pretimeout. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: w83627hf_wdt: Support NCT6796D, NCT6797D, NCT6798DGuenter Roeck1-1/+7
The watchdog controller on NCT6796D, NCT6797D, and NCT6798D is compatible with the wtachdog controller on other Nuvoton chips. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: mpc8xxx: use dev_xxxx() instead of pr_xxxx()Christophe Leroy1-12/+12
mpc8xxx watchdog driver is a platform device drivers, it is therefore possible to use dev_xxx() messaging rather than pr_xxx() Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: lantiq: add get_timeleft callbackHauke Mehrtens1-0/+11
This callback will provide the current time left. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: lantiq: Convert to watchdog_deviceHauke Mehrtens2-154/+125
Instead of doing the ioctl handling manually just use register a watchdog_device and let the watchdog framework do the ioctl handling. This also removes the ltq_wdt_bootstatus_set typedef and replaces it with a structure providing the chip specific functions pointer. The watchdog_init_timeout() function is now used and the initial timeout can be provided in device tree. If the watchdog was already activated it will not be stopped any more, but the settings from the driver will be used and the watchdog subsystem will take care. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: lantiq: update register names to better match specHauke Mehrtens1-17/+19
Some of the names of the bits were confusing to me. Now the bits share the same prefix as the register they are set on. The LTQ_WDT_CR_PWL register (bits 26:25) is the pre warning limit and it does not turn anything on. It has 4 possible divers 1/2, 1/4, 1/8 and 1/16, this drivers only uses 1/16. The LTQ_WDT_CR_CLKDIV register bits(25:24) is only configuring a clock divers and do not turn any thing on too, all possible values are valid dividers. Using the LTQ_WDT_SR prefix is also wrong these bits are used in the LTQ_WDT_CR registers, SR is the status register which is read only. This uses GENMASK where it is a mask and it uses shifts when a value is written to some bits. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: sama5d4: fix timeout-sec usageRomain Izard1-5/+1
When using watchdog_init_timeout to update the default timeout value, an error means that there is no "timeout-sec" in the relevant device tree node. This should not prevent binding of the driver to the device. Fixes: 976932e40036 ("watchdog: sama5d4: make use of timeout-secs provided in devicetree") Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: fix a small number of "watchog" typos in commentsRobert P. J. Day2-3/+3
All typos in comments, should not affect functionality. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: rza_wdt: convert to SPDX identifiersKuninori Morimoto1-4/+1
This patch updates license to use SPDX-License-Identifier instead of verbose license text. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: iTCO_wdt: Remove unused hooksJean Delvare3-18/+0
As the only user of iTCO_vendor_pre_keepalive and iTCO_vendor_pre_set_heartbeat has just been removed, we can delete these 2 hooks. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Martin Wilck <mwilck@suse.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: iTCO_wdt: Drop option vendorsupport=2Jean Delvare1-150/+8
iTCO_vendor_support's option vendorsupport=2 is a gross hack. It claims to extend the existing iTCO_wdt driver, but in fact programs a watchdog on a completely different device (Super-I/O) without requesting its I/O ports and without checking the device ID. This is an utterly dangerous thing to do. It also turns out to be unnecessary, because as far as I can tell, the code in question is basically duplicating what the clean w83627hf_wdt driver is doing. My guess is that on these SuperMicro boards which sparkled the implementation of vendorsupport=2, the watchdog functionality of the Intel south bridge is not used, and the watchdog feature of some W83627HF-like Super-I/O chip is used instead. So we should point the users to the w83627hf_wdt driver. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Martin Wilck <mwilck@suse.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: renesas_wdt: stop when unregisteringWolfram Sang1-0/+1
We want to go into a sane state when unregistering. Currently, it happens that the watchdog stops when unbinding because of RuntimePM stopping the core clock. When rebinding, the core clock gets reactivated and the watchdog fires even though it hasn't been opened by userspace yet. Strange scenario, yes, but sane state is much preferred anyhow. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: core: fix null pointer dereference when releasing cdevWolfram Sang1-5/+5
watchdog_stop() calls watchdog_update_worker() which needs a valid wdd->wd_data pointer. So, when unregistering the cdev, clear the pointers after we call watchdog_stop(), not before. Fixes: bb292ac1c602 ("watchdog: Introduce watchdog_stop_on_unregister helper") Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: renesas_wdt: use SPDX identifier for Renesas driversWolfram Sang1-4/+1
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Update version number.Jerry Hoemann1-1/+1
Bump version number to reflect recent bug fixes. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Module paramerter alias.Jerry Hoemann1-0/+3
Add module parameter "timeout" as an alias to "soft_margin." This aligns hpwdt usage more closely with other WDT while retaining backwards compatibility. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Display module parameters.Jerry Hoemann1-3/+6
Print module parameters when the driver is loaded. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Claim NMI from iLOJerry Hoemann1-1/+1
The hwpdt driver is overloaded for handling both the iLO watchdog and the explicit "Generate NMI to System" virutal button. Hence NMI handler needs to claim NMI resulting from the virutal button. Claim if iLO generated accommodating firmware that might set wrong bit. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-10-02watchdog: hpwdt: Initialize pretimeout from module parameter.Jerry Hoemann1-2/+2
When the pretimeout is specified as a module parameter, the value should be reflected in hpwdt_dev.pretimeout. The default (on) case is correct. But, when disabling pretimeout, the value should be set to zero in hpwdt_dev. When compiling w/o CONFIG_HPWDT_NMI_DECODING defined, the pretimeout module parameter is ignored and the value internally will be 0. Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-08-22include/linux/compiler*.h: make compiler-*.h mutually exclusiveNick Desaulniers1-5/+0
Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6") recently exposed a brittle part of the build for supporting non-gcc compilers. Both Clang and ICC define __GNUC__, __GNUC_MINOR__, and __GNUC_PATCHLEVEL__ for quick compatibility with code bases that haven't added compiler specific checks for __clang__ or __INTEL_COMPILER. This is brittle, as they happened to get compatibility by posing as a certain version of GCC. This broke when upgrading the minimal version of GCC required to build the kernel, to a version above what ICC and Clang claim to be. Rather than always including compiler-gcc.h then undefining or redefining macros in compiler-intel.h or compiler-clang.h, let's separate out the compiler specific macro definitions into mutually exclusive headers, do more proper compiler detection, and keep shared definitions in compiler_types.h. Fixes: cafa0010cd51 ("Raise the minimum required gcc version to 4.6") Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com> Suggested-by: Eli Friedman <efriedma@codeaurora.org> Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-08-18Merge tag 'linux-watchdog-4.19-rc1' of ↵Linus Torvalds9-64/+312
git://www.linux-watchdog.org/linux-watchdog Pull watchdog updates from Wim Van Sebroeck: - add MEN 16z069 IP-Core driver - renesas-wdt: add support for the R8A77990 wdt - stm32_iwdg: Add stm32mp1 support and pclk feature - sp805_wdt, orion_wdt, sprd_wdt: several improvements - imx2_wdt, stmp3xxx: switch to SPDX identifier * tag 'linux-watchdog-4.19-rc1' of git://www.linux-watchdog.org/linux-watchdog: watchdog: fix dependencies of menz69_wdt.o watchdog: sp805: Add clock-frequency property watchdog: add driver for the MEN 16z069 IP-Core watchdog: sprd_wdt: Remove redundant dev_err call in sprd_wdt_probe() watchdog: stmp3xxx: Switch to SPDX identifier watchdog: imx2_wdt: Switch to SPDX identifier watchdog: sp805: set WDOG_HW_RUNNING when appropriate watchdog: sp805: add 'timeout-sec' DT property support dt-bindings: watchdog: Add optional 'timeout-sec' property for sp805 dt-bindings: watchdog: Consolidate SP805 binding docs watchdog: orion_wdt: Mark watchdog as active when running at probe watchdog: stm32: add pclk feature for stm32mp1 dt-bindings: watchdog: add stm32mp1 support dt-bindings: watchdog: renesas-wdt: Add support for the R8A77990 wdt
2018-08-06watchdog: fix dependencies of menz69_wdt.oJohannes Thumshirn1-1/+1
Currently menz69_wdt.ko has a dependency on MCB or COMPILE_TEST. But it actually needs symbols exported by MCB so the || COMPILE_TEST is wrong. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-08-06watchdog: sp805: Add clock-frequency propertySrinath Mannam1-10/+25
Use clock-frequency property given in _DSD object of ACPI device to calculate Watchdog rate as binding clock devices are not available as device tree. Note: There is no formal review process for _DSD properties Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Ray Jui <ray.jui@broadcom.com> Reviewed-by: Scott Branden <scott.branden@broadcom.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-08-02watchdog: add driver for the MEN 16z069 IP-CoreJohannes Thumshirn3-0/+181
Add a driver for the MEN 16z069 Watchdog and Reset Controller IP-Core. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Michael Moese <mmoese@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2018-08-02watchdog: sprd_wdt: Remove redundant dev_err call in sprd_wdt_probe()Wei Yongjun1-3/+1
There is a error message within devm_ioremap_resource already, so remove the dev_err call to avoid redundant error message. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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