Commit Graph

1777 Commits

Author SHA1 Message Date
Eric Long
4776034670 watchdog: Add Spreadtrum watchdog driver
This patch adds the watchdog driver for Spreadtrum SC9860 platform.

Signed-off-by: Eric Long <eric.long@spreadtrum.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@iguana.be>
2017-12-28 20:45:40 +01:00
Christophe Leroy
19ce9490aa watchdog: mpc8xxx: use the core worker function
The watchdog core includes a worker function which pings the
watchdog until user app starts pinging it and which also
pings it if the HW require more frequent pings.
Use that function instead of the dedicated timer.
In the mean time, we can allow the user to change the timeout.

Then change the timeout module parameter to use seconds and
use the watchdog_init_timeout() core function.

On some HW (eg: the 8xx), SWCRR contains bits unrelated to the
watchdog which have to be preserved upon write.

This driver has nothing preventing the use of the magic close, so
enable it.

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@iguana.be>
2017-12-28 20:45:36 +01:00
Rasmus Villemoes
bc137dfdbe watchdog: gpio_wdt: set WDOG_HW_RUNNING in gpio_wdt_stop
The first patch above (https://patchwork.kernel.org/patch/9970181/)
makes the oops go away, but it just papers over the problem. The real
problem is that the watchdog core clears WDOG_HW_RUNNING in
watchdog_stop, and the gpio driver fails to set it in its stop
function when it doesn't actually stop it. This means that the core
doesn't know that it now has responsibility for petting the device, in
turn causing the device to reset the system (I hadn't noticed this
because the board I'm working on has that reset logic disabled).

How about this (other drivers may of course have the same problem, I
haven't checked). One might say that ->stop should return an error
when the device can't be stopped, but OTOH this brings parity between
a device without a ->stop method and a GPIO wd that has always-running
set. IOW, I think ->stop should only return an error when an actual
attempt to stop the hardware failed.

From: Rasmus Villemoes <rasmus.villemoes@prevas.dk>

The watchdog framework clears WDOG_HW_RUNNING before calling
->stop. If the driver is unable to stop the device, it is supposed to
set that bit again so that the watchdog core takes care of sending
heart-beats while the device is not open from user-space. Update the
gpio_wdt driver to honour that contract (and get rid of the redundant
clearing of WDOG_HW_RUNNING).

Fixes: 3c10bbde10 ("watchdog: core: Clear WDOG_HW_RUNNING before calling the stop function")
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-12-28 20:45:36 +01:00
Gustavo A. R. Silva
57b6d481f7 watchdog: wdt_pci: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:30 +01:00
Gustavo A. R. Silva
e2af3092d0 watchdog: watchdog_dev: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:30 +01:00
Gustavo A. R. Silva
4d379727af watchdog: pcwd_pci: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:29 +01:00
Gustavo A. R. Silva
3d002ea611 watchdog: pcwd_usb: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:29 +01:00
Gustavo A. R. Silva
fd846b57a6 watchdog: f71808e_wdt: mark expected switch fall-throughs
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:28 +01:00
Gustavo A. R. Silva
a9868bcc4f watchdog: alim1535_wdt: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:28 +01:00
Gustavo A. R. Silva
083ccebb56 watchdog: advantechwdt: mark expected switch fall-through
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case I replaced "Fall" with a proper
"fall through" comment, which is what GCC is expecting to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-12-28 20:45:28 +01:00
Tomas Winkler
7692a98269 watchdog: mei_wdt: don't use of variable length array
Fixes sparse warning:
drivers/watchdog/mei_wdt.c:530:18: warning: Variable length array is used

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Alexander Usyskin <alexander.usyskin@intel.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@iguana.be>
2017-12-28 20:45:23 +01:00
Radu Rendec
788c2fdb4f watchdog: i6300esb: remove info message and version number
The initial info message (early in the esb_probe() function) is not very
useful and we already have a message on successful probe, which includes
device identification. If the probe fails (e.g. PCI related errors),
additional messages are printed anyway.

The version number was only used in the initial info message. Other than
that, it serves no useful purpose and it ran out of favor upstream
anyway.

Signed-off-by: Radu Rendec <rrendec@arista.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@iguana.be>
2017-12-28 20:45:18 +01:00
Radu Rendec
568d6015db watchdog: i6300esb: do not hardcode heartbeat limits
The minimum, maximum and default values for the watchdog heartbeat
(timeout) were hardcoded in several places (including module parameter
description and warning message for invalid module parameter value).

This patch adds macros for the aforementioned values and replaces all
occurences of hardcoded values by these macros.

Signed-off-by: Radu Rendec <rrendec@arista.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@iguana.be>
2017-12-28 20:45:18 +01:00
Radu Rendec
cf73120ba4 watchdog: i6300esb: support multiple devices
Support multiple i6300esb devices simultaneously, by removing the single
device restriction in the original design and leveraging the multiple
device support of the watchdog subsystem.

This patch replaces the global definitions of watchdog device data with
a dynamically allocated structure. This structure is allocated during
device probe, so multiple independent structures can be allocated if
multiple devices are probed.

Signed-off-by: Radu Rendec <rrendec@arista.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@iguana.be>
2017-12-28 20:45:17 +01:00
Radu Rendec
7af4ac8772 watchdog: i6300esb: use the watchdog subsystem
Change the i6300esb driver to use the watchdog subsystem instead of the
legacy watchdog API. This is mainly just getting rid of the "write" and
"ioctl" methods and part of the watchdog control logic (which are all
implemented by the watchdog subsystem).

Even though the watchdog subsystem supports registering and handling
multiple watchdog devices at the same time, the i6300esb driver still
has a limitation of only one i6300esb device due to some global variable
usage that comes from the original design. However, the driver can now
coexist with other watchdog devices (supported by different drivers).

Signed-off-by: Radu Rendec <rrendec@arista.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@iguana.be>
2017-12-28 20:45:17 +01:00
Jerry Hoemann
838534e50e watchdog: hpwdt: Check source of NMI
Do not claim the NMI (i.e. return NMI_DONE) if the source of
the NMI isn't the iLO watchdog or debug.

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@iguana.be>
2017-12-28 20:45:13 +01:00
Corentin Labbe
e531037145 watchdog: sunxi_wdt: use of_device_get_match_data
The usage of of_device_get_match_data reduce the code size a bit.
Furthermore, it prevents an improbable dereference when
of_match_device() return NULL.

Signed-off-by: Corentin Labbe <clabbe.montjoie@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@iguana.be>
2017-12-28 20:45:12 +01:00
Arnd Bergmann
b6c84c9ff3 watchdog: xen: use time64_t for timeouts
The Xen watchdog driver uses __kernel_time_t and ktime_to_timespec()
internally for managing its timeouts. Both are deprecated because of
y2038 problems. The driver itself is fine, since it only uses monotonic
times, but converting it to use ktime_get_seconds() avoids the deprecated
interfaces and is slightly simpler.

Signed-off-by: Arnd Bergmann <arnd@arndb.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@iguana.be>
2017-12-28 20:45:12 +01:00
Michael Grzeschik
fb484262f9 watchdog: da9062: use protection delay mechanism from core
This patch removes the windows protection routine that got
now covered by the wdt core.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.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@iguana.be>
2017-12-28 20:45:08 +01:00
Michael Grzeschik
f31b2a9bde watchdog: da9062: Disable and wait before changing timeout
The DA9062 watchdog occasionally enters error condition and resets the
system if the timeout is changed quickly after the timer was enabled.

The method of disabling and waiting for > 150 µs before setting the
new timeout is taken from the DA9052 driver.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.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@iguana.be>
2017-12-28 20:45:07 +01:00
Michael Grzeschik
540f635192 watchdog: da9062: Add restart handler support
Register a restart handler for the da9062 watchdog.  System restart is
triggered by sending the shutdown command to the PMIC.
As more-suitable restart handlers may exist, the priority of the
watchdog restart handler is set to 128.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.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@iguana.be>
2017-12-28 20:45:07 +01:00
Linus Walleij
d5433fd60d watchdog: ftwdt010: Make interrupt optional
The Moxart does not appear to be using the interrupt from the
watchdog timer, maybe it's not even routed, so as to support
more architectures with this driver, make the interrupt
optional.

While we are at it: actually enable the use of the interrupt
if present by setting the right bit in the control register
and define the missing control register bits.

Signed-off-by: Linus Walleij <linus.walleij@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@iguana.be>
2017-12-28 20:45:02 +01:00
Linus Walleij
766a2aad64 watchdog: gemini/ftwdt010: rename driver and symbols
This renames all the driver files and symbols for the Gemini
watchdog to FTWDT010 as it has been revealed that this IP block
is a generic watchdog timer from Faraday Technology used in
several SoC designs.

Select this driver by default for the Gemini, it is a sensible
driver to always have enabled.

Signed-off-by: Linus Walleij <linus.walleij@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@iguana.be>
2017-12-28 20:45:02 +01:00
Chris Packham
844ecd970f watchdog: orion: fix typo
Correct typo in comment "insterted" -> "inserted".

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-12-28 20:44:57 +01:00
Linus Walleij
a2363f9d2f watchdog: gpio: Convert to use GPIO descriptors
This converts the GPIO watchdog driver to use GPIO descriptors
instead of relying on the old method to read out GPIO numbers
from the device tree and then using those with the old GPIO
API.

The descriptor API keeps track of whether the line is active
low so we can remove all active low handling and rely on the
GPIO descriptor to deal with this for us.

Signed-off-by: Linus Walleij <linus.walleij@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@iguana.be>
2017-12-28 20:44:57 +01:00
Linus Walleij
d0d0677e8f watchdog: gpio: Add some local helper variables
This add "dev" and "np" variables to make the probe() function
a bit easier to read.

Signed-off-by: Linus Walleij <linus.walleij@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@iguana.be>
2017-12-28 20:44:56 +01:00
Oleksij Rempel
1bfe888938 watchdog: dw_wdt: add stop watchdog operation
The only way of stopping the watchdog is by resetting it.
Add the watchdog op for stopping the device and reset if
a reset line is provided.

At same time WDOG_HW_RUNNING should be remove from dw_wdt_start.
As commented by Guenter Roeck:
dw_wdt sets WDOG_HW_RUNNING in its open function. Result is
that the kref_get() in watchdog_open() won't be executed. But then
kref_put() in close will be called since the watchdog now does stop.
This causes the imbalance.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-watchdog@vger.kernel.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@iguana.be>
2017-12-28 20:44:55 +01:00
Andrew Jeffery
d4238aa458 watchdog: aspeed: Move init to arch_initcall
Probing at device_initcall time lead to perverse cases where the
watchdog was probed after, say, I2C devices, which then leaves a
potentially running watchdog at the mercy of I2C device behaviour and
bus conditions.

Load the watchdog driver early to ensure that the kernel is patting it
well before initialising peripherals.

Signed-off-by: Andrew Jeffery <andrew@aj.id.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@iguana.be>
2017-12-28 20:44:50 +01:00
Andrew Jeffery
2050dd0610 watchdog: aspeed: Remove specific reference to AST2400 in Kconfig
The driver also supports the watchdog in the AST25xx series, and
may work on earlier SoCs as well.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.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@iguana.be>
2017-12-28 20:44:49 +01:00
Andrew Jeffery
ffff023a72 watchdog: aspeed: Fix 'Apseed' typo in Kconfig
Apseed sounds like a good name for a web/mobile start-up incubator, but
isn't a reflection of Aspeed themselves.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.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@iguana.be>
2017-12-28 20:44:49 +01:00
Andrew Jeffery
9f3e13c74e watchdog: aspeed: Retain watchdog enabled state
An unintended post-condition of probe() is that the watchdog is
disabled. This behaviour was introduced by an unnecessary write to the
control register to configure the hardware based on the devicetree. The
write is unnecessary because the cached control value that is
manipulated by the code parsing the devicetree is eventually written by
aspeed_wdt_enable(), which is when we care how the control register
should be configured.

Remove the write to restore expected behaviour.

Fixes: b7f0b8ad25 ("drivers/watchdog: ASPEED reference dev tree properties for config")
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Joel Stanley <joel@jms.id.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@iguana.be>
2017-12-28 20:44:48 +01:00
Mathieu Malaterre
71246c3528 watchdog: jz4740: Add support for the watchdog in jz4780 SoC
The watchdog unit present in the JZ4780 works the same as the one in the
JZ4740.

Signed-off-by: Mathieu Malaterre <malat@debian.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@iguana.be>
2017-12-28 20:44:44 +01:00
Andreas Färber
2bdf6acbfe watchdog: Add Realtek RTD1295
Add a watchdog driver for the Realtek RTD1295 SoC.

Based on QNAP's arch/arm/mach-rtk119x/driver/rtk_watchdog.c code and
mach-rtk119x/driver/dc2vo/fpga/include/iso_reg.h register defines.

Signed-off-by: Andreas Färber <afaerber@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@iguana.be>
2017-12-28 20:44:39 +01:00
Jerry Hoemann
c42cbe4172 watchdog: hpwdt: SMBIOS check
This corrects:
commit cce78da766 ("watchdog: hpwdt: Add check for UEFI bits")

The test on HPE SMBIOS extension type 219 record "Misc Features"
bits for UEFI support is incorrect.  The definition of the Misc Features
bits in the HPE SMBIOS OEM Extensions specification (and related
firmware) was changed to use a different pair of bits to
represent UEFI supported.  Howerver, a corresponding change
to Linux was missed.

Current code/platform work because the iCRU test is working.
But purpose of cce78da766 is to ensure correct functionality
on future systems where iCRU isn't supported.

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@iguana.be>
2017-12-17 11:01:49 +01:00
Matt Redfearn
24f8d23307 watchdog: indydog: Add dependency on SGI_HAS_INDYDOG
Commit da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
enabled building the Indy watchdog driver when COMPILE_TEST is enabled.
However, the driver makes reference to symbols that are only defined for
certain platforms are selected in the config. These platforms select
SGI_HAS_INDYDOG. Without this, link time errors result, for example
when building a MIPS allyesconfig.

drivers/watchdog/indydog.o: In function `indydog_write':
indydog.c:(.text+0x18): undefined reference to `sgimc'
indydog.c:(.text+0x1c): undefined reference to `sgimc'
drivers/watchdog/indydog.o: In function `indydog_start':
indydog.c:(.text+0x54): undefined reference to `sgimc'
indydog.c:(.text+0x58): undefined reference to `sgimc'
drivers/watchdog/indydog.o: In function `indydog_stop':
indydog.c:(.text+0xa4): undefined reference to `sgimc'
drivers/watchdog/indydog.o:indydog.c:(.text+0xa8): more undefined
references to `sgimc' follow
make: *** [Makefile:1005: vmlinux] Error 1

Fix this by ensuring that CONFIG_INDIDOG can only be selected when the
necessary dependent platform symbols are built in.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Matt Redfearn <matt.redfearn@mips.com>
Cc: <stable@vger.kernel.org> # 4.11 +
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Suggested-by: James Hogan <james.hogan@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@iguana.be>
2017-12-17 11:01:48 +01:00
Guenter Roeck
914d65f3f0 watchdog: Fix kref imbalance seen if handle_boot_enabled=0
If handle_boot_enabled is set to 0, the watchdog driver module use
counter will not be increased and kref_get() will not be called when
registering the watchdog. Subsequently, on open, this does not happen
either because the code believes that it was already done because the
hardware watchdog is marked as running.

We could introduce a state variable to indicate this state, but let's
just increase the module use counter and call kref_get() unconditionally
if the hardware watchdog is running when a driver is registering itself
to keep the code simple.

Fixes: 2501b01531 ("watchdog: core: add option to avoid early ...")
Cc: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-12-17 11:01:48 +01:00
Guenter Roeck
4bcd615fad watchdog: Fix potential kref imbalance when opening watchdog
If a watchdog driver's open function sets WDOG_HW_RUNNING with the
expectation that the watchdog can not be stopped, but then stops the
watchdog anyway in its stop function, kref_get() wil not be called in
watchdog_open(). If the watchdog then stops on close, WDOG_HW_RUNNING
will be cleared and kref_put() will be called, causing a kref imbalance.
As result the character device data structure will be released, which in
turn will cause the system to crash on the next call to watchdog_open().

Fixes: ee142889e3 ("watchdog: Introduce WDOG_HW_RUNNING flag")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-12-17 11:01:47 +01:00
Kees Cook
e99e88a9d2 treewide: setup_timer() -> timer_setup()
This converts all remaining cases of the old setup_timer() API into using
timer_setup(), where the callback argument is the structure already
holding the struct timer_list. These should have no behavioral changes,
since they just change which pointer is passed into the callback with
the same available pointers after conversion. It handles the following
examples, in addition to some other variations.

Casting from unsigned long:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, ptr);

and forced object casts:

    void my_callback(struct something *ptr)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, (unsigned long)ptr);

become:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

Direct function assignments:

    void my_callback(unsigned long data)
    {
        struct something *ptr = (struct something *)data;
    ...
    }
    ...
    ptr->my_timer.function = my_callback;

have a temporary cast added, along with converting the args:

    void my_callback(struct timer_list *t)
    {
        struct something *ptr = from_timer(ptr, t, my_timer);
    ...
    }
    ...
    ptr->my_timer.function = (TIMER_FUNC_TYPE)my_callback;

And finally, callbacks without a data assignment:

    void my_callback(unsigned long data)
    {
    ...
    }
    ...
    setup_timer(&ptr->my_timer, my_callback, 0);

have their argument renamed to verify they're unused during conversion:

    void my_callback(struct timer_list *unused)
    {
    ...
    }
    ...
    timer_setup(&ptr->my_timer, my_callback, 0);

The conversion is done with the following Coccinelle script:

spatch --very-quiet --all-includes --include-headers \
	-I ./arch/x86/include -I ./arch/x86/include/generated \
	-I ./include -I ./arch/x86/include/uapi \
	-I ./arch/x86/include/generated/uapi -I ./include/uapi \
	-I ./include/generated/uapi --include ./include/linux/kconfig.h \
	--dir . \
	--cocci-file ~/src/data/timer_setup.cocci

@fix_address_of@
expression e;
@@

 setup_timer(
-&(e)
+&e
 , ...)

// Update any raw setup_timer() usages that have a NULL callback, but
// would otherwise match change_timer_function_usage, since the latter
// will update all function assignments done in the face of a NULL
// function initialization in setup_timer().
@change_timer_function_usage_NULL@
expression _E;
identifier _timer;
type _cast_data;
@@

(
-setup_timer(&_E->_timer, NULL, _E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E->_timer, NULL, (_cast_data)_E);
+timer_setup(&_E->_timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, &_E);
+timer_setup(&_E._timer, NULL, 0);
|
-setup_timer(&_E._timer, NULL, (_cast_data)&_E);
+timer_setup(&_E._timer, NULL, 0);
)

@change_timer_function_usage@
expression _E;
identifier _timer;
struct timer_list _stl;
identifier _callback;
type _cast_func, _cast_data;
@@

(
-setup_timer(&_E->_timer, _callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, &_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, _E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, &_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)_E);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, (_cast_func)&_callback, (_cast_data)&_E);
+timer_setup(&_E._timer, _callback, 0);
|
 _E->_timer@_stl.function = _callback;
|
 _E->_timer@_stl.function = &_callback;
|
 _E->_timer@_stl.function = (_cast_func)_callback;
|
 _E->_timer@_stl.function = (_cast_func)&_callback;
|
 _E._timer@_stl.function = _callback;
|
 _E._timer@_stl.function = &_callback;
|
 _E._timer@_stl.function = (_cast_func)_callback;
|
 _E._timer@_stl.function = (_cast_func)&_callback;
)

// callback(unsigned long arg)
@change_callback_handle_cast
 depends on change_timer_function_usage@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
identifier _handle;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
(
	... when != _origarg
	_handletype *_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(_handletype *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
|
	... when != _origarg
	_handletype *_handle;
	... when != _handle
	_handle =
-(void *)_origarg;
+from_timer(_handle, t, _timer);
	... when != _origarg
)
 }

// callback(unsigned long arg) without existing variable
@change_callback_handle_cast_no_arg
 depends on change_timer_function_usage &&
                     !change_callback_handle_cast@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _origtype;
identifier _origarg;
type _handletype;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *t
 )
 {
+	_handletype *_origarg = from_timer(_origarg, t, _timer);
+
	... when != _origarg
-	(_handletype *)_origarg
+	_origarg
	... when != _origarg
 }

// Avoid already converted callbacks.
@match_callback_converted
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
	    !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier t;
@@

 void _callback(struct timer_list *t)
 { ... }

// callback(struct something *handle)
@change_callback_handle_arg
 depends on change_timer_function_usage &&
	    !match_callback_converted &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
@@

 void _callback(
-_handletype *_handle
+struct timer_list *t
 )
 {
+	_handletype *_handle = from_timer(_handle, t, _timer);
	...
 }

// If change_callback_handle_arg ran on an empty function, remove
// the added handler.
@unchange_callback_handle_arg
 depends on change_timer_function_usage &&
	    change_callback_handle_arg@
identifier change_timer_function_usage._callback;
identifier change_timer_function_usage._timer;
type _handletype;
identifier _handle;
identifier t;
@@

 void _callback(struct timer_list *t)
 {
-	_handletype *_handle = from_timer(_handle, t, _timer);
 }

// We only want to refactor the setup_timer() data argument if we've found
// the matching callback. This undoes changes in change_timer_function_usage.
@unchange_timer_function_usage
 depends on change_timer_function_usage &&
            !change_callback_handle_cast &&
            !change_callback_handle_cast_no_arg &&
	    !change_callback_handle_arg@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type change_timer_function_usage._cast_data;
@@

(
-timer_setup(&_E->_timer, _callback, 0);
+setup_timer(&_E->_timer, _callback, (_cast_data)_E);
|
-timer_setup(&_E._timer, _callback, 0);
+setup_timer(&_E._timer, _callback, (_cast_data)&_E);
)

// If we fixed a callback from a .function assignment, fix the
// assignment cast now.
@change_timer_function_assignment
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression change_timer_function_usage._E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_func;
typedef TIMER_FUNC_TYPE;
@@

(
 _E->_timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E->_timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-&_callback;
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)_callback
+(TIMER_FUNC_TYPE)_callback
 ;
|
 _E._timer.function =
-(_cast_func)&_callback
+(TIMER_FUNC_TYPE)_callback
 ;
)

// Sometimes timer functions are called directly. Replace matched args.
@change_timer_function_calls
 depends on change_timer_function_usage &&
            (change_callback_handle_cast ||
             change_callback_handle_cast_no_arg ||
             change_callback_handle_arg)@
expression _E;
identifier change_timer_function_usage._timer;
identifier change_timer_function_usage._callback;
type _cast_data;
@@

 _callback(
(
-(_cast_data)_E
+&_E->_timer
|
-(_cast_data)&_E
+&_E._timer
|
-_E
+&_E->_timer
)
 )

// If a timer has been configured without a data argument, it can be
// converted without regard to the callback argument, since it is unused.
@match_timer_function_unused_data@
expression _E;
identifier _timer;
identifier _callback;
@@

(
-setup_timer(&_E->_timer, _callback, 0);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0L);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E->_timer, _callback, 0UL);
+timer_setup(&_E->_timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0L);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_E._timer, _callback, 0UL);
+timer_setup(&_E._timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0L);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(&_timer, _callback, 0UL);
+timer_setup(&_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0L);
+timer_setup(_timer, _callback, 0);
|
-setup_timer(_timer, _callback, 0UL);
+timer_setup(_timer, _callback, 0);
)

@change_callback_unused_data
 depends on match_timer_function_unused_data@
identifier match_timer_function_unused_data._callback;
type _origtype;
identifier _origarg;
@@

 void _callback(
-_origtype _origarg
+struct timer_list *unused
 )
 {
	... when != _origarg
 }

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-21 15:57:07 -08:00
Kees Cook
24ed960abf treewide: Switch DEFINE_TIMER callbacks to struct timer_list *
This changes all DEFINE_TIMER() callbacks to use a struct timer_list
pointer instead of unsigned long. Since the data argument has already been
removed, none of these callbacks are using their argument currently, so
this renames the argument to "unused".

Done using the following semantic patch:

@match_define_timer@
declarer name DEFINE_TIMER;
identifier _timer, _callback;
@@

 DEFINE_TIMER(_timer, _callback);

@change_callback depends on match_define_timer@
identifier match_define_timer._callback;
type _origtype;
identifier _origarg;
@@

 void
-_callback(_origtype _origarg)
+_callback(struct timer_list *unused)
 { ... }

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-21 15:57:05 -08:00
Andrey Smirnov
44ea39420f drivers/watchdog: make use of devm_register_reboot_notifier()
Save a bit of cleanup code by leveraging newly added
devm_register_reboot_notifier().

[akpm@linux-foundation.org: small cleanup: avoid 80-col tricks]
Link: http://lkml.kernel.org/r/20170411160615.9784-1-andrew.smirnov@gmail.com
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-17 16:10:04 -08:00
Linus Torvalds
892204e06c MIPS changes for 4.15
These are the main MIPS changes for 4.15.
 
 Fixes:
 - ralink: Fix MT7620 PCI build issues (4.5)
 - Disable cmpxchg64() and HAVE_VIRT_CPU_ACCOUNTING_GEN for 32-bit SMP
   (4.1)
 - Fix MIPS64 FP save/restore on 32-bit kernels (4.0)
 - ptrace: Pick up ptrace/seccomp changed syscall numbers (3.19)
 - ralink: Fix MT7628 pinmux (3.19)
 - BCM47XX: Fix LED inversion on WRT54GSv1 (3.17)
 - Fix n32 core dumping as o32 since regset support (3.13)
 - ralink: Drop obsolete USB_ARCH_HAS_HCD select
 
 Build system:
 - Default to "generic" (multiplatform) system type instead of IP22
 - Use generic little endian MIPS32 r2 configuration as default defconfig
   instead of ip22_defconfig
 
 FPU emulation:
 - Fix exception generation for certain R6 FPU instructions
 
 SMP:
 - Allow __cpu_number_map to be larger than NR_CPUS for sparse CPU id
   spaces
 
 Miscellaneous:
 - Add iomem resource for kernel bss section for kexec/kdump
 - Atomics: Nudge writes on bit unlock
 - DT files: Standardise "ok" -> "okay"
 
 Platform support:
 
  BMIPS:
  - Enable HARDIRQS_SW_RESEND
 
  Broadcom BCM63XX:
  - Add clkdev lookup support
  - Update clk driver, UART driver, DTs to handle named refclk from DTs
  - Split apart various clocks to more closely match hardware
  - Add ethernet clocks
 
  Cavium Octeon:
  - Remove usage of cvmx_wait() in favour of __delay()
 
  ImgTec Pistachio:
  - DT: Drop deprecated dwmmc num-slots property
 
  Ingenic JZ4780:
  - Add NFS root to Ci20 defconfig
  - Add watchdog to Ci20 DT & defconfig, and allow building of watchdog
    driver with this SoC
 
  Generic (multiplatform):
  - Migrate xilfpga (MIPSfpga) platform to the generic platform
 
  Lantiq xway:
  - Fix ASC0/ASC1 clocks
 
 Minor cleanups:
 - Define virt_to_pfn()
 - Make thread_saved_pc static
 - Simplify 32-bit sign extension in __read_64bit_c0_split()
 - DMA: Use vma_pages() helper
 - FPU emulation: Replace unsigned with unsigned int
 - MM: Removed unused lastpfn
 - Alchemy: Make clk_ops const
 - Lasat: Use setup_timer() helper
 - ralink: Use BIT() in MT7620 PCI driver
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Merge tag 'mips_4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

Pull MIPS updates from James Hogan:
 "These are the main MIPS changes for 4.15.

  Fixes:
   - ralink: Fix MT7620 PCI build issues (4.5)
   - Disable cmpxchg64() and HAVE_VIRT_CPU_ACCOUNTING_GEN for 32-bit SMP
     (4.1)
   - Fix MIPS64 FP save/restore on 32-bit kernels (4.0)
   - ptrace: Pick up ptrace/seccomp changed syscall numbers (3.19)
   - ralink: Fix MT7628 pinmux (3.19)
   - BCM47XX: Fix LED inversion on WRT54GSv1 (3.17)
   - Fix n32 core dumping as o32 since regset support (3.13)
   - ralink: Drop obsolete USB_ARCH_HAS_HCD select

  Build system:
   - Default to "generic" (multiplatform) system type instead of IP22
   - Use generic little endian MIPS32 r2 configuration as default
     defconfig instead of ip22_defconfig

  FPU emulation:
   - Fix exception generation for certain R6 FPU instructions

  SMP:
   - Allow __cpu_number_map to be larger than NR_CPUS for sparse CPU id
     spaces

  Miscellaneous:
   - Add iomem resource for kernel bss section for kexec/kdump
   - Atomics: Nudge writes on bit unlock
   - DT files: Standardise "ok" -> "okay"

  Minor cleanups:
   - Define virt_to_pfn()
   - Make thread_saved_pc static
   - Simplify 32-bit sign extension in __read_64bit_c0_split()
   - DMA: Use vma_pages() helper
   - FPU emulation: Replace unsigned with unsigned int
   - MM: Removed unused lastpfn
   - Alchemy: Make clk_ops const
   - Lasat: Use setup_timer() helper
   - ralink: Use BIT() in MT7620 PCI driver

  Platform support:

  BMIPS:
  - Enable HARDIRQS_SW_RESEND

  Broadcom BCM63XX:
  - Add clkdev lookup support
  - Update clk driver, UART driver, DTs to handle named refclk from DTs
  - Split apart various clocks to more closely match hardware
  - Add ethernet clocks

  Cavium Octeon:
  - Remove usage of cvmx_wait() in favour of __delay()

  ImgTec Pistachio:
  - DT: Drop deprecated dwmmc num-slots property

  Ingenic JZ4780:
  - Add NFS root to Ci20 defconfig
  - Add watchdog to Ci20 DT & defconfig, and allow building of watchdog
    driver with this SoC

  Generic (multiplatform):
  - Migrate xilfpga (MIPSfpga) platform to the generic platform

  Lantiq xway:
  - Fix ASC0/ASC1 clocks"

* tag 'mips_4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (46 commits)
  MIPS: Add iomem resource for kernel bss section.
  MIPS: cmpxchg64() and HAVE_VIRT_CPU_ACCOUNTING_GEN don't work for 32-bit SMP
  MIPS: BMIPS: Enable HARDIRQS_SW_RESEND
  MIPS: pci: Make use of the BIT() macro inside the mt7620 driver
  MIPS: pci: Remove KERN_WARN instance inside the mt7620 driver
  MIPS: pci: Remove duplicate define in mt7620 driver
  MIPS: ralink: Fix typo in mt7628 pinmux function
  MIPS: ralink: Fix MT7628 pinmux
  MIPS: Fix odd fp register warnings with MIPS64r2
  watchdog: jz4780: Allow selection of jz4740-wdt driver
  MIPS/ptrace: Update syscall nr on register changes
  MIPS/ptrace: Pick up ptrace/seccomp changed syscalls
  MIPS: Fix an n32 core file generation regset support regression
  MIPS: Fix MIPS64 FP save/restore on 32-bit kernels
  MIPS: page.h: Define virt_to_pfn()
  MIPS: Xilfpga: Switch to using generic defconfigs
  MIPS: generic: Add support for MIPSfpga
  MIPS: Set defconfig target to a generic system for 32r2el
  MIPS: Kconfig: Set default MIPS system type as generic
  MIPS: DTS: Remove num-slots from Pistachio SoC
  ...
2017-11-15 11:36:08 -08:00
Linus Torvalds
2bcc673101 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner:
 "Yet another big pile of changes:

   - More year 2038 work from Arnd slowly reaching the point where we
     need to think about the syscalls themself.

   - A new timer function which allows to conditionally (re)arm a timer
     only when it's either not running or the new expiry time is sooner
     than the armed expiry time. This allows to use a single timer for
     multiple timeout requirements w/o caring about the first expiry
     time at the call site.

   - A new NMI safe accessor to clock real time for the printk timestamp
     work. Can be used by tracing, perf as well if required.

   - A large number of timer setup conversions from Kees which got
     collected here because either maintainers requested so or they
     simply got ignored. As Kees pointed out already there are a few
     trivial merge conflicts and some redundant commits which was
     unavoidable due to the size of this conversion effort.

   - Avoid a redundant iteration in the timer wheel softirq processing.

   - Provide a mechanism to treat RTC implementations depending on their
     hardware properties, i.e. don't inflict the write at the 0.5
     seconds boundary which originates from the PC CMOS RTC to all RTCs.
     No functional change as drivers need to be updated separately.

   - The usual small updates to core code clocksource drivers. Nothing
     really exciting"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits)
  timers: Add a function to start/reduce a timer
  pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday()
  timer: Prepare to change all DEFINE_TIMER() callbacks
  netfilter: ipvs: Convert timers to use timer_setup()
  scsi: qla2xxx: Convert timers to use timer_setup()
  block/aoe: discover_timer: Convert timers to use timer_setup()
  ide: Convert timers to use timer_setup()
  drbd: Convert timers to use timer_setup()
  mailbox: Convert timers to use timer_setup()
  crypto: Convert timers to use timer_setup()
  drivers/pcmcia: omap1: Fix error in automated timer conversion
  ARM: footbridge: Fix typo in timer conversion
  drivers/sgi-xp: Convert timers to use timer_setup()
  drivers/pcmcia: Convert timers to use timer_setup()
  drivers/memstick: Convert timers to use timer_setup()
  drivers/macintosh: Convert timers to use timer_setup()
  hwrng/xgene-rng: Convert timers to use timer_setup()
  auxdisplay: Convert timers to use timer_setup()
  sparc/led: Convert timers to use timer_setup()
  mips: ip22/32: Convert timers to use timer_setup()
  ...
2017-11-13 17:56:58 -08:00
Mathieu Malaterre
fe1a5cbc78 watchdog: jz4780: Allow selection of jz4740-wdt driver
This driver works for jz4740 & jz4780.

Suggested-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17251/
Signed-off-by: James Hogan <jhogan@kernel.org>
2017-11-09 17:09:48 +00:00
Kees Cook
d1cadcb7ca watchdog: lpc18xx_wdt: Convert timers to use timer_setup()
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: linux-watchdog@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
2017-11-02 15:50:30 -07:00
Kees Cook
4fa42b4e5d watchdog: cpwd: Convert timers to use timer_setup()
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Switches to using the global that is
used everywhere else.

Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
2017-11-02 15:50:26 -07:00
Greg Kroah-Hartman
b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-02 11:10:55 +01:00
Kees Cook
1d27e3e225 timer: Remove expires and data arguments from DEFINE_TIMER
Drop the arguments from the macro and adjust all callers with the
following script:

  perl -pi -e 's/DEFINE_TIMER\((.*), 0, 0\);/DEFINE_TIMER($1);/g;' \
    $(git grep DEFINE_TIMER | cut -d: -f1 | sort -u | grep -v timer.h)

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # for m68k parts
Acked-by: Guenter Roeck <linux@roeck-us.net> # for watchdog parts
Acked-by: David S. Miller <davem@davemloft.net> # for networking parts
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Kalle Valo <kvalo@codeaurora.org> # for wireless parts
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@linux-mips.org
Cc: Petr Mladek <pmladek@suse.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: linux1394-devel@lists.sourceforge.net
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: linux-s390@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ursula Braun <ubraun@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Harish Patil <harish.patil@cavium.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Michael Reed <mdr@sgi.com>
Cc: Manish Chopra <manish.chopra@cavium.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-pm@vger.kernel.org
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Mark Gross <mark.gross@intel.com>
Cc: linux-watchdog@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: netdev@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lkml.kernel.org/r/1507159627-127660-11-git-send-email-keescook@chromium.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-10-05 15:01:20 +02:00
Kees Cook
1ff9789745 timer: Remove users of expire and data arguments to DEFINE_TIMER
The expire and data arguments of DEFINE_TIMER are only used in two places
and are ignored by the code (malta-display.c only uses mod_timer(),
never add_timer(), so the preset expires value is ignored). Set both
sets of arguments to zero.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Guenter Roeck <linux@roeck-us.net> # for watchdog parts
Cc: linux-mips@linux-mips.org
Cc: Petr Mladek <pmladek@suse.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: linux1394-devel@lists.sourceforge.net
Cc: linux-s390@vger.kernel.org
Cc: linux-wireless@vger.kernel.org
Cc: "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>
Cc: linux-scsi@vger.kernel.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Ursula Braun <ubraun@linux.vnet.ibm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Harish Patil <harish.patil@cavium.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Manish Chopra <manish.chopra@cavium.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-pm@vger.kernel.org
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Mark Gross <mark.gross@intel.com>
Cc: linux-watchdog@vger.kernel.org
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: Michael Reed <mdr@sgi.com>
Cc: netdev@vger.kernel.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Link: https://lkml.kernel.org/r/1507159627-127660-10-git-send-email-keescook@chromium.org
2017-10-05 15:01:20 +02:00
Linus Torvalds
7318413077 Merge branch '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for 4.14 for MIPS; below a summary of
  the non-merge commits:

  CM:
   - Rename mips_cm_base to mips_gcr_base
   - Specify register size when generating accessors
   - Use BIT/GENMASK for register fields, order & drop shifts
   - Add cluster & block args to mips_cm_lock_other()

  CPC:
   - Use common CPS accessor generation macros
   - Use BIT/GENMASK for register fields, order & drop shifts
   - Introduce register modify (set/clear/change) accessors
   - Use change_*, set_* & clear_* where appropriate
   - Add CM/CPC 3.5 register definitions
   - Use GlobalNumber macros rather than magic numbers
   - Have asm/mips-cps.h include CM & CPC headers
   - Cluster support for topology functions
   - Detect CPUs in secondary clusters

  CPS:
   - Read GIC_VL_IDENT directly, not via irqchip driver

  DMA:
   - Consolidate coherent and non-coherent dma_alloc code
   - Don't use dma_cache_sync to implement fd_cacheflush

  FPU emulation / FP assist code:
   - Another series of 14 commits fixing corner cases such as NaN
     propgagation and other special input values.
   - Zero bits 32-63 of the result for a CLASS.D instruction.
   - Enhanced statics via debugfs
   - Do not use bools for arithmetic. GCC 7.1 moans about this.
   - Correct user fault_addr type

  Generic MIPS:
   - Enhancement of stack backtraces
   - Cleanup from non-existing options
   - Handle non word sized instructions when examining frame
   - Fix detection and decoding of ADDIUSP instruction
   - Fix decoding of SWSP16 instruction
   - Refactor handling of stack pointer in get_frame_info
   - Remove unreachable code from force_fcr31_sig()
   - Convert to using %pOF instead of full_name
   - Remove the R6000 support.
   - Move FP code from *_switch.S to *_fpu.S
   - Remove unused ST_OFF from r2300_switch.S
   - Allow platform to specify multiple its.S files
   - Add #includes to various files to ensure code builds reliable and
     without warning..
   - Remove __invalidate_kernel_vmap_range
   - Remove plat_timer_setup
   - Declare various variables & functions static
   - Abstract CPU core & VP(E) ID access through accessor functions
   - Store core & VP IDs in GlobalNumber-style variable
   - Unify checks for sibling CPUs
   - Add CPU cluster number accessors
   - Prevent direct use of generic_defconfig
   - Make CONFIG_MIPS_MT_SMP default y
   - Add __ioread64_copy
   - Remove unnecessary inclusions of linux/irqchip/mips-gic.h

  GIC:
   - Introduce asm/mips-gic.h with accessor functions
   - Use new GIC accessor functions in mips-gic-timer
   - Remove counter access functions from irq-mips-gic.c
   - Remove gic_read_local_vp_id() from irq-mips-gic.c
   - Simplify shared interrupt pending/mask reads in irq-mips-gic.c
   - Simplify gic_local_irq_domain_map() in irq-mips-gic.c
   - Drop gic_(re)set_mask() functions in irq-mips-gic.c
   - Remove gic_set_polarity(), gic_set_trigger(), gic_set_dual_edge(),
     gic_map_to_pin() and gic_map_to_vpe() from irq-mips-gic.c.
   - Convert remaining shared reg access, local int mask access and
     remaining local reg access to new accessors
   - Move GIC_LOCAL_INT_* to asm/mips-gic.h
   - Remove GIC_CPU_INT* macros from irq-mips-gic.c
   - Move various definitions to the driver
   - Remove gic_get_usm_range()
   - Remove __gic_irq_dispatch() forward declaration
   - Remove gic_init()
   - Use mips_gic_present() in place of gic_present and remove
     gic_present
   - Move gic_get_c0_*_int() to asm/mips-gic.h
   - Remove linux/irqchip/mips-gic.h
   - Inline __gic_init()
   - Inline gic_basic_init()
   - Make pcpu_masks a per-cpu variable
   - Use pcpu_masks to avoid reading GIC_SH_MASK*
   - Clean up mti, reserved-cpu-vectors handling
   - Use cpumask_first_and() in gic_set_affinity()
   - Let the core set struct irq_common_data affinity

  microMIPS:
   - Fix microMIPS stack unwinding on big endian systems

  MIPS-GIC:
   - SYNC after enabling GIC region

  NUMA:
   - Remove the unused parent_node() macro

  R6:
   - Constify r2_decoder_tables
   - Add accessor & bit definitions for GlobalNumber

  SMP:
   - Constify smp ops
   - Allow boot_secondary SMP op to return errors

  VDSO:
   - Drop gic_get_usm_range() usage
   - Avoid use of linux/irqchip/mips-gic.h

  Platform changes:

  Alchemy:
   - Add devboard machine type to cpuinfo
   - update cpu feature overrides
   - Threaded carddetect irqs for devboards

  AR7:
   - allow NULL clock for clk_get_rate

  BCM63xx:
   - Fix ENETDMA_6345_MAXBURST_REG offset
   - Allow NULL clock for clk_get_rate

  CI20:
   - Enable GPIO and RTC drivers in defconfig
   - Add ethernet and fixed-regulator nodes to DTS

  Generic platform:
   - Move Boston and NI 169445 FIT image source to their own files
   - Include asm/bootinfo.h for plat_fdt_relocated()
   - Include asm/time.h for get_c0_*_int()
   - Include asm/bootinfo.h for plat_fdt_relocated()
   - Include asm/time.h for get_c0_*_int()
   - Allow filtering enabled boards by requirements
   - Don't explicitly disable CONFIG_USB_SUPPORT
   - Bump default NR_CPUS to 16

  JZ4700:
   - Probe the jz4740-rtc driver from devicetree

  Lantiq:
   - Drop check of boot select from the spi-falcon driver.
   - Drop check of boot select from the lantiq-flash MTD driver.
   - Access boot cause register in the watchdog driver through regmap
   - Add device tree binding documentation for the watchdog driver
   - Add docs for the RCU DT bindings.
   - Convert the fpi bus driver to a platform_driver
   - Remove ltq_reset_cause() and ltq_boot_select(
   - Switch to a proper reset driver
   - Switch to a new drivers/soc GPHY driver
   - Add an USB PHY driver for the Lantiq SoCs using the RCU module
   - Use of_platform_default_populate instead of __dt_register_buses
   - Enable MFD_SYSCON to be able to use it for the RCU MFD
   - Replace ltq_boot_select() with dummy implementation.

  Loongson 2F:
   - Allow NULL clock for clk_get_rate

  Malta:
   - Use new GIC accessor functions

  NI 169445:
   - Add support for NI 169445 board.
   - Only include in 32r2el kernels

  Octeon:
   - Add support for watchdog of 78XX SOCs.
   - Add support for watchdog of CN68XX SOCs.
   - Expose support for mips32r1, mips32r2 and mips64r1
   - Enable more drivers in config file
   - Add support for accessing the boot vector.
   - Remove old boot vector code from watchdog driver
   - Define watchdog registers for 70xx, 73xx, 78xx, F75xx.
   - Make CSR functions node aware.
   - Allow access to CIU3 IRQ domains.
   - Misc cleanups in the watchdog driver

  Omega2+:
   - New board, add support and defconfig

  Pistachio:
   - Enable Root FS on NFS in defconfig

  Ralink:
   - Add Mediatek MT7628A SoC
   - Allow NULL clock for clk_get_rate
   - Explicitly request exclusive reset control in the pci-mt7620 PCI driver.

  SEAD3:
   - Only include in 32 bit kernels by default

  VoCore:
   - Add VoCore as a vendor t0 dt-bindings
   - Add defconfig file"

* '4.14-features' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (167 commits)
  MIPS: Refactor handling of stack pointer in get_frame_info
  MIPS: Stacktrace: Fix microMIPS stack unwinding on big endian systems
  MIPS: microMIPS: Fix decoding of swsp16 instruction
  MIPS: microMIPS: Fix decoding of addiusp instruction
  MIPS: microMIPS: Fix detection of addiusp instruction
  MIPS: Handle non word sized instructions when examining frame
  MIPS: ralink: allow NULL clock for clk_get_rate
  MIPS: Loongson 2F: allow NULL clock for clk_get_rate
  MIPS: BCM63XX: allow NULL clock for clk_get_rate
  MIPS: AR7: allow NULL clock for clk_get_rate
  MIPS: BCM63XX: fix ENETDMA_6345_MAXBURST_REG offset
  mips: Save all registers when saving the frame
  MIPS: Add DWARF unwinding to assembly
  MIPS: Make SAVE_SOME more standard
  MIPS: Fix issues in backtraces
  MIPS: jz4780: DTS: Probe the jz4740-rtc driver from devicetree
  MIPS: Ci20: Enable RTC driver
  watchdog: octeon-wdt: Add support for 78XX SOCs.
  watchdog: octeon-wdt: Add support for cn68XX SOCs.
  watchdog: octeon-wdt: File cleaning.
  ...
2017-09-15 20:43:33 -07:00
Arvind Yadav
4cb30b044a watchdog: mei_wdt: constify mei_cl_device_id
mei_cl_device_id are not supposed to change at runtime. All functions
working with mei_cl_device_id provided by <linux/mei_cl_bus.h> work
with const mei_cl_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 21:19:58 +02:00
Arvind Yadav
05ce42fff3 watchdog: sp805: constify amba_id
amba_id are not supposed to change at runtime. All functions
working with const amba_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 21:17:44 +02:00
Arvind Yadav
68c82befe4 watchdog: ziirave: constify i2c_device_id
i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 21:16:17 +02:00
Arvind Yadav
39ad808996 watchdog: sc1200: constify pnp_device_id
pnp_device_id are not supposed to change at runtime. All functions
working with pnp_device_id provided by <linux/pnp.h> work with
const pnp_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 21:14:46 +02:00
Wolfram Sang
1f185596e7 watchdog: renesas_wdt: update copyright dates
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 21:11:58 +02:00
Wolfram Sang
9c22b6d336 watchdog: renesas_wdt: make 'clk' a variable local to probe()
It is not needed outside probe() anymore.

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>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-09-09 21:11:55 +02:00
Wolfram Sang
3be42941dd watchdog: renesas_wdt: consistently use RuntimePM for clock management
On Renesas R-Car archs, RuntimePM does all the clock handling. So, use
it consistently to enable/disable the clocks. Also make sure that clocks
are really enabled around clk_get_rate(). clk_summary looks proper now:

		clock	enable_cnt	prepare_cnt	rate ...
Before this commit:

At boot:	rwdt	1		1		32768 0 0
WDT running:	rwdt	2		2		32768 0 0

After this commit:

At boot:	rwdt	0		1		32768 0 0
WDT running	rwdt	1		1		32768 0 0

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>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-09-09 21:11:52 +02:00
Andrew Jeffery
012c04601f watchdog: aspeed: Support configuration of external signal properties
Add support for configuring the drive strength and polarity on the
AST2500, and the pulse duration on both the AST2400 and AST2500.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Tested-by: Matt Spinler <mspinler@linux.vnet.ibm.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@iguana.be>
2017-09-09 21:05:07 +02:00
Christopher Bostic
b7f0b8ad25 drivers/watchdog: ASPEED reference dev tree properties for config
Reference the system device tree when configuring the watchdog
engines. If property 'aspeed,reset_type' is present then set
reset behavior based on the specified value.  This can be one of
three different mutually exclusive values
  * cpu - Reset CPU only on watchdog timeout
  * soc - Reset System on Chip
  * system - Full system reset

No reset can also be specified by indicating:
  * none - No reset, assumes another watchdog is responsible for
           this.

Add optional property 'aspeed,external-signal'. If present then
configure to generate external signal on watchdog timeout.

Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.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@iguana.be>
2017-09-09 21:04:59 +02:00
fzuuzf@googlemail.com
a1f2a82072 watchdog: da9063_wdt: Simplify by removing unneeded struct...
...da9063_watchdog, which contained nothing but struct watchdog_device and a
struct da9063 pointer.
Assign the struct da9063 pointer directly to the struct watchdog_device's
driver_data field instead of creating struct da9063_watchdog and assigning
it's address there.
Spares a pointer's size data memory and an indirection level in the callbacks.

Signed-off-by: Karsten Wiese <fzuuzf@googlemail.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@iguana.be>
2017-09-09 20:55:26 +02:00
Fabio Estevam
dd0a18ca4c watchdog: bcm7038: Check the return value from clk_prepare_enable()
clk_prepare_enable() may fail, so we should better check its return value
and propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.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@iguana.be>
2017-09-09 20:52:13 +02:00
Fabio Estevam
15210ad18f watchdog: qcom: Check for platform_get_resource() failure
platform_get_resource() may fail, so we should better check its
return value and propagate an error in case it fails.

This avoids a NULL pointer dereference a bit later in the code.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.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@iguana.be>
2017-09-09 20:50:35 +02:00
Michal Simek
6f671c6b62 watchdog: of_xilinx_wdt: Add suspend/resume support
Add suspend/resume support to driver.

Signed-off-by: Michal Simek <michal.simek@xilinx.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@iguana.be>
2017-09-09 20:48:18 +02:00
Maulik Jodhani
b6bc416455 watchdog: of_xilinx_wdt: Add support for reading freq via CCF
Improve CLK handling in the code to read freq via CCF.
Also disable CLK asap and add clk handling code to start and stop.

Signed-off-by: Maulik Jodhani <maulik.jodhani@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.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@iguana.be>
2017-09-09 20:45:21 +02:00
Arvind Yadav
e8c7ebfdb4 watchdog: max77620_wdt: constify platform_device_id
platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 20:40:39 +02:00
Arvind Yadav
cc53e1c2bb watchdog: pcwd_usb: constify usb_device_id
usb_device_id are not supposed to change at runtime. All functions
working with usb_device_id provided by <linux/usb.h> work with
const usb_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-09-09 20:37:36 +02:00
Michal Simek
f3a7f6f67f watchdog: cadence_wdt: Show information when driver is probed
Showing message that driver is loaded is common across drivers.
This change also fixes checkpatch (--strict) warning
"Alignment should match open parenthesis".

Signed-off-by: Michal Simek <michal.simek@xilinx.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@iguana.be>
2017-09-09 20:35:31 +02:00
Michal Simek
db202f4d5c watchdog: cadence_wdt: Enable access to module parameters
Give read access to module parameters to all and write access to root.
This change also improves driver error path testing.

Signed-off-by: Michal Simek <michal.simek@xilinx.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@iguana.be>
2017-09-09 20:33:29 +02:00
Julia Lawall
323edb2e27 watchdog: constify watchdog_ops and watchdog_info structures
These watchdog_ops and watchdog_info structures are only stored
in the ops and info fields of a watchdog_device structure,
respectively, which are const.  Thus make the watchdog_ops and
watchdog_info structures const as well.

Done with the help of Coccinelle.  The rules for the watchdog_ops case are
as follows:

// <smpl>
@r disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct watchdog_ops i = { ... };
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Linus Walleij <linus.walleij@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@iguana.be>
2017-09-09 20:29:53 +02:00
Wolfram Sang
d94fa4655e watchdog: asm9260_wdt: don't round closest with get_timeleft
We should never return more time left than there actually is. So, switch
to a plain divider instead of DIV_ROUND_CLOSEST.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:25:34 +02:00
Wolfram Sang
03a196f25f watchdog: renesas_wdt: add another divider option
If we set RWTCSRB to 0, we can gain 4096 as another divider value. This
is supported by all R-Car Gen2 and Gen3 devices which we aim to support.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:23:24 +02:00
Wolfram Sang
82f64cd208 watchdog: renesas_wdt: apply better precision
The error margin of the clks_per_second variable was too large and
caused offsets when used with clock frequencies which left a remainder
after applying the dividers. Now we always calculate directly using the
clock rate and the divider using some helper macros. That also means
that DIV_ROUND_UP moves from probe to the multiplication macro. In
probe, we don't need to ensure anymore that 'clks_per_sec' would go too
fast but rather ensure that the lower limit is really at least 1 to
certainly get a full cycle.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:23:19 +02:00
Wolfram Sang
1c1b243401 watchdog: renesas_wdt: don't round closest with get_timeleft
We should never return more time left than there actually is. So, switch
to a plain divider instead of DIV_ROUND_CLOSEST.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:23:14 +02:00
Wolfram Sang
b51247c802 watchdog: renesas_wdt: check rate also for upper limit
When checking the clock rate, ensure also that counting all 16 bits
takes at least one second to match the granularity of the framework.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:23:08 +02:00
Wolfram Sang
f6159dd4b0 watchdog: renesas_wdt: avoid (theoretical) type overflow
Because the smallest clock divider we can select is 1, 'clks_per_sec'
must be the same type as 'rate'.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.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@iguana.be>
2017-09-09 20:23:00 +02:00
Philipp Zabel
0bade0215c watchdog: mt7621: explicitly request exclusive reset control
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.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@iguana.be>
2017-09-09 20:18:56 +02:00
Philipp Zabel
a248e5e9a7 watchdog: rt2880: explicitly request exclusive reset control
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.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@iguana.be>
2017-09-09 20:18:50 +02:00
Philipp Zabel
39055bbb44 watchdog: zx2967: explicitly request exclusive reset control
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.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@iguana.be>
2017-09-09 20:18:43 +02:00
Philipp Zabel
fcc6da076a watchdog: asm9260: explicitly request exclusive reset control
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: linux-watchdog@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.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@iguana.be>
2017-09-09 20:18:36 +02:00
Martin Blumenstingl
43a64e81b2 watchdog: meson-wdt: add support for the watchdog on Meson8 and Meson8m2
The watchdog IP block on Meson8 and Meson8m2 is already supported by the
existing meson-wdt driver. Meson8 uses the same register bits as Meson6,
while the newer Meson8m2 SoC uses the same register bits as Meson8b.

Currently watchdog support on Meson8 SoC already works because
meson8.dtsi simply uses the "amlogic,meson6-wdt" compatible. Adding a
separate compatible for Meson8 makes this more explicit though.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-09-09 20:14:01 +02:00
Colin Ian King
08b10b57d6 watchdog: w83627hf: make const array chip_name static
Don't populate array chip_name on the stack but instead make it static.
Makes the object code smaller by 40 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
   5641	   2840	    384	   8865	   22a1	drivers/watchdog/w83627hf_wdt.o

After:
   text	   data	    bss	    dec	    hex	filename
   5545	   2896	    384	   8825	   2279	drivers/watchdog/w83627hf_wdt.o

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@iguana.be>
2017-09-09 20:08:03 +02:00
Gustavo A. R. Silva
9215fc7952 watchdog: coh901327_wdt: constify watchdog_ops structure
Check for watchdog_ops structures that are only stored in the ops field of
a watchdog_device structure. This field is declared const, so watchdog_ops
structures that have this property can be declared as const also.

This issue was detected using Coccinelle and the following semantic patch:

@r
disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct watchdog_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-09-09 20:06:38 +02:00
Gustavo A. R. Silva
d7b16e75d4 watchdog: stm32_iwdg: constify watchdog_ops structure
Check for watchdog_ops structures that are only stored in the ops field of
a watchdog_device structure. This field is declared const, so watchdog_ops
structures that have this property can be declared as const also.

This issue was detected using Coccinelle and the following semantic patch:

@r
disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct watchdog_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-09-09 20:06:31 +02:00
Gustavo A. R. Silva
2211a8dce7 watchdog: it87_wdt: constify watchdog_ops structure
Check for watchdog_ops structures that are only stored in the ops field of
a watchdog_device structure. This field is declared const, so watchdog_ops
structures that have this property can be declared as const also.

This issue was detected using Coccinelle and the following semantic patch:

@r
disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct watchdog_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-09-09 20:06:25 +02:00
Gustavo A. R. Silva
5870ac753b watchdog: ts72xx_wdt: constify watchdog_ops structure
Check for watchdog_ops structures that are only stored in the ops field of
a watchdog_device structure. This field is declared const, so watchdog_ops
structures that have this property can be declared as const also.

This issue was detected using Coccinelle and the following semantic patch:

@r
disable optional_qualifier@
identifier i;
position p;
@@
static struct watchdog_ops i@p = { ... };

@ok@
identifier r.i;
struct watchdog_device e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct watchdog_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
 struct watchdog_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.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@iguana.be>
2017-09-09 20:06:14 +02:00
Wim Van Sebroeck
fc61e83a29 watchdog: Revert "iTCO_wdt: all versions count down twice"
This reverts commit 1fccb73011.
Reported as Bug 196509 - iTCO_wdt regression reboot before timeout expire

Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-09-09 17:41:24 +02:00
Carlos Munoz
1d1821b20d watchdog: octeon-wdt: Add support for 78XX SOCs.
Signed-off-by: Carlos Munoz <carlos.munoz@caviumnetworks.com>
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17214/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-09-04 21:19:03 +02:00
David Daney
0cd4e7a918 watchdog: octeon-wdt: Add support for cn68XX SOCs.
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Carlos Munoz <cmunoz@caviumnetworks.com>
Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17213/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-09-04 21:19:03 +02:00
Steven J. Hill
381cec022e watchdog: octeon-wdt: File cleaning.
* Update copyright and company name.
* Remove unused headers.
* Fix variable spelling and data type.
* Use octal values for module parameters.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17212/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-09-04 21:19:03 +02:00
Steven J. Hill
49d148b4e5 watchdog: octeon-wdt: Remove old boot vector code.
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: linux-mips@linux-mips.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17209/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-09-04 21:19:03 +02:00
Wolfram Sang
a205425658 mfd: twl: Move header file out of I2C realm
include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2017-09-04 14:41:02 +01:00
Hauke Mehrtens
710322ba8c watchdog: lantiq: access boot cause register through regmap
This patch avoids accessing the function ltq_reset_cause() and directly
accesses the register given over the syscon interface. The syscon
interface will be implemented for the xway SoCs for the falcon SoCs the
ltq_reset_cause() function never worked, because a wrong offset was used.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Guenter Roeck <linux@reck-us.net>
Cc: martin.blumenstingl@googlemail.com
Cc: john@phrozen.org
Cc: robh@kernel.org
Cc: andy.shevchenko@gmail.com
Cc: p.zabel@pengutronix.de
Cc: kishon@ti.com
Cc: mark.rutland@arm.com
Cc: linux-mips@linux-mips.org
Cc: linux-mtd@lists.infradead.org
Cc: linux-watchdog@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-spi@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17123/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-09-04 13:53:15 +02:00
Linus Torvalds
07d306c838 Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog updates from Wim Van Sebroeck:

 - Add Renesas RZ/A WDT Watchdog driver

 - STM32 Independent WatchDoG (IWDG) support

 - UniPhier watchdog support

 - Add F71868 support

 - Add support for NCT6793D and NCT6795D

 - dw_wdt: add reset lines support

 - core: add option to avoid early handling of watchdog

 - core: introduce watchdog_worker_should_ping helper

 - Cleanups and improvements for sama5d4, intel-mid_wdt, s3c2410_wdt,
   orion_wdt, gpio_wdt, it87_wdt, meson_wdt, davinci_wdt, bcm47xx_wdt,
   zx2967_wdt, cadence_wdt

* git://www.linux-watchdog.org/linux-watchdog: (32 commits)
  watchdog: introduce watchdog_worker_should_ping helper
  watchdog: uniphier: add UniPhier watchdog driver
  dt-bindings: watchdog: add description for UniPhier WDT controller
  watchdog: cadence_wdt: make of_device_ids const.
  watchdog: zx2967: constify zx2967_wdt_ops.
  watchdog: bcm47xx_wdt: constify bcm47xx_wdt_hard_ops and bcm47xx_wdt_soft_ops
  watchdog: davinci: Add missing clk_disable_unprepare().
  watchdog: davinci: Handle return value of clk_prepare_enable
  watchdog: meson: Handle return value of clk_prepare_enable
  watchdog: it87: Add support for various Super-IO chips
  watchdog: it87: Use infrastructure to stop watchdog on reboot
  watchdog: it87: Drop support for resetting watchdog though CIR and Game port
  watchdog: it87: Convert to use watchdog core infrastructure
  watchdog: it87: Drop FSF mailing address
  watchdog: dw_wdt: get reset lines from dt
  watchdog: bindings: dw_wdt: add reset lines
  watchdog: w83627hf: Add support for NCT6793D and NCT6795D
  watchdog: core: add option to avoid early handling of watchdog
  watchdog: f71808e_wdt: Add F71868 support
  watchdog: Add STM32 IWDG driver
  ...
2017-07-11 09:59:37 -07:00
Rasmus Villemoes
c013b65ad8 watchdog: introduce watchdog_worker_should_ping helper
This will be useful when the condition becomes slightly more
complicated in the next patch.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Esben Haabendal <esben@haabendal.dk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 13:59:05 +02:00
Keiji Hayashibara
e7bf02895f watchdog: uniphier: add UniPhier watchdog driver
Add a watchdog driver for Socionext UniPhier series SoC.
Note that the timeout value for this device must be a power
of 2 because of the specification.

Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.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@iguana.be>
2017-07-03 13:58:55 +02:00
Arvind Yadav
011e29e7d9 watchdog: cadence_wdt: make of_device_ids const.
of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   1962	    612	      4	   2578	    a12	drivers/watchdog/cadence_wdt.o

File size after constify cdns_wdt_of_match:
   text	   data	    bss	    dec	    hex	filename
   2378	    196	      4	   2578	    a12	drivers/watchdog/cadence_wdt.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 13:53:43 +02:00
Arvind Yadav
935988c674 watchdog: zx2967: constify zx2967_wdt_ops.
File size before:
   text	   data	    bss	    dec	    hex	filename
    988	    288	      0	   1276	    4fc	drivers/watchdog/zx2967_wdt.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   1084	    192	      0	   1276	    4fc	drivers/watchdog/zx2967_wdt.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 13:53:34 +02:00
Arvind Yadav
d34f1f4800 watchdog: bcm47xx_wdt: constify bcm47xx_wdt_hard_ops and bcm47xx_wdt_soft_ops
File size before:
   text	   data	    bss	    dec	    hex	filename
   1282	    388	      1	   1671	    687	drivers/watchdog/bcm47xx_wdt.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   1474	    196	      1	   1671	    687	drivers/watchdog/bcm47xx_wdt.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 13:53:28 +02:00
Arvind Yadav
737bcff5fa watchdog: davinci: Add missing clk_disable_unprepare().
davinci_wdt_probe() can fail here and we must disable clock.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 11:02:43 +02:00
Arvind Yadav
8f11eb58ad watchdog: davinci: Handle return value of clk_prepare_enable
clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 11:02:38 +02:00
Arvind Yadav
65360944c1 watchdog: meson: Handle return value of clk_prepare_enable
clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@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@iguana.be>
2017-07-03 11:02:31 +02:00
Guenter Roeck
cddda07c7b watchdog: it87: Add support for various Super-IO chips
Add support for IT8607, IT8622, IT8625, IT8628, IT8655, IT8665,
and IT8686.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 10:58:59 +02:00
Guenter Roeck
1123c514b1 watchdog: it87: Use infrastructure to stop watchdog on reboot
Use watchdog_stop_on_reboot() to stop the watchdog on reboot instead
of registering a driver-specific notifier.

While at it, reorder remaining include files alphabetically.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 10:58:56 +02:00
Guenter Roeck
893dc8b5c9 watchdog: it87: Drop support for resetting watchdog though CIR and Game port
Resetting the watchdog timer on CIR interrupts or on game port interrupts
is not not supported on recent chips, and doesn't really tell if the system
is stable. On top of that, at least the bit to enable resetting the
watchdog through the game port is used differently on recent chips.
Drop resetting the watchdog on CIR  or game port interrupts to simplify
the code.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 10:58:50 +02:00
Guenter Roeck
1d7b80394c watchdog: it87: Convert to use watchdog core infrastructure
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 10:58:47 +02:00
Guenter Roeck
7334030173 watchdog: it87: Drop FSF mailing address
The FSF mailing address may change. Drop it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-07-03 10:58:45 +02:00
Steffen Trumtrar
65a3b6935d watchdog: dw_wdt: get reset lines from dt
The dw_wdt has an external reset line, that can keep the device in reset
and therefore rendering it useless and also is the only way of stopping
the watchdog once it was started.

Get the reset lines for this core from the devicetree. As these lines are
optional, use devm_reset_control_get_optional_shared. If the reset line
is not specified in the devicetree, the reset framework will just skip
deasserting and continue.
This way all users of the driver will continue to function without
any harm, even if the reset line is not specified in the devicetree.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Cc: linux-watchdog@vger.kernel.org
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.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@iguana.be>
2017-07-03 10:52:04 +02:00
Murilo Opsfelder Araujo
42bed04255 drivers/watchdog/Kconfig: Update CONFIG_WATCHDOG_RTAS dependencies
drivers/watchdog/wdrtas.c uses symbols defined in arch/powerpc/kernel/rtas.c,
which are exported iff CONFIG_PPC_RTAS is selected. Building wdrtas.c without
setting CONFIG_PPC_RTAS throws the following errors:

    ERROR: ".rtas_token" [drivers/watchdog/wdrtas.ko] undefined!
    ERROR: "rtas_data_buf" [drivers/watchdog/wdrtas.ko] undefined!
    ERROR: "rtas_data_buf_lock" [drivers/watchdog/wdrtas.ko] undefined!
    ERROR: ".rtas_get_sensor" [drivers/watchdog/wdrtas.ko] undefined!
    ERROR: ".rtas_call" [drivers/watchdog/wdrtas.ko] undefined!

This was identified during a randconfig build where CONFIG_WATCHDOG_RTAS=m and
CONFIG_PPC_RTAS was not set. Logs are here:

    http://kisskb.ellerman.id.au/kisskb/buildresult/12982152/

This patch fixes the issue by updating CONFIG_WATCHDOG_RTAS to depend on just
CONFIG_PPC_RTAS, removing COMPILE_TEST entirely.

Signed-off-by: Murilo Opsfelder Araujo <mopsfelder@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-15 16:37:40 +10:00
Guenter Roeck
3a9aedb282 watchdog: w83627hf: Add support for NCT6793D and NCT6795D
Both NCT6793D and NCT6795D are compatible to NCT6792D.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-06-05 20:55:48 +02:00
Sebastian Reichel
2501b01531 watchdog: core: add option to avoid early handling of watchdog
On some systems its desirable to have watchdog reboot the system
when it does not come up fast enough. This adds a kernel parameter
to disable the auto-update of watchdog before userspace takes over
and a kernel option to set the default. The info messages were
added to shorten error searching on misconfigured systems.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-06-05 20:55:17 +02:00
Maciej S. Szmigiero
166fbcf88f watchdog: f71808e_wdt: Add F71868 support
This adds support for watchdog part of Fintek F71868 Super I/O chip to
f71808e_wdt driver.

The F71868 chip is, in general, very similar to a F71869, however it has
slightly different set of available reset pulse widths.

Tested on MSI A55M-P33 motherboard.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.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@iguana.be>
2017-06-05 20:43:01 +02:00
Yannick Fertre
4332d113c6 watchdog: Add STM32 IWDG driver
This patch adds IWDG (Independent WatchDoG) support for STM32 platform.

Signed-off-by: Yannick FERTRE <yannick.fertre@st.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@iguana.be>
2017-06-05 20:42:41 +02:00
Guenter Roeck
03bca15833 watchdog: gpio: Convert to use infrastructure triggered keepalives
The watchdog infrastructure now supports handling watchdog keepalive
if the watchdog is running while the watchdog device is closed.
The infrastructure now also supports generating additional heartbeats
if the maximum hardware timeout is smaller than or close to the
configured timeout. Convert the driver to use this infrastructure.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-06-05 20:39:27 +02:00
Uwe Kleine-König
ecd94a41de watchdog: orion: make license info match the file header
The header says: This file is licensed under the terms of the GNU
General Public License version 2. The right identifier for
MODULE_LICENSE is "GPL v2" then.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.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@iguana.be>
2017-06-05 20:39:12 +02:00
Krzysztof Kozlowski
08497f22b1 watchdog: s3c2410: Minor code cleanup
Cleanup the code from minor readability issues (no functional changes):
1. Fix checkpatch: ERROR: Do not include the paragraph about writing to
   the Free Software Foundation's mailing address.
2. Fix checkpatch: WARNING: quoted string split across lines
3. Fix chechpatch: WARNING: Prefer 'unsigned int' to bare use of
   'unsigned'
4. Use 'dev' consistently in probe function instead of mixing dev with
   &pdev->dev.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.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@iguana.be>
2017-06-05 20:38:52 +02:00
Krzysztof Kozlowski
a9a02c4662 watchdog: s3c2410: Simplify getting driver data
Simplify the flow in helper function for getting the driver data by
using of_device_get_match_data() and only one if() branch.

The code should be equivalent.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.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@iguana.be>
2017-06-05 20:38:26 +02:00
Krzysztof Kozlowski
58415efe96 watchdog: s3c2410: Constify local structures
Structures watchdog_device, watchdog_ops and s3c2410_wdt_variant are not
modified so they can be made const to increase code safeness.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.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@iguana.be>
2017-06-05 20:38:14 +02:00
Andy Shevchenko
954351e870 watchdog: intel-mid_wdt: Keep watchdog running
Firmware followed by bootloader leaves watchdog running.

Keep it running in the driver.

User will not need any additional options to reboot in case of panic
during boot.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.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@iguana.be>
2017-06-05 20:37:35 +02:00
Chris Brandt
aea24187f6 watchdog: add rza_wdt driver
Adds a watchdog timer driver for the Renesas RZ/A Series SoCs. A reset
handler is also included since a WDT overflow is the only method for
restarting an RZ/A SoC.

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@iguana.be>
2017-06-05 20:37:17 +02:00
Alexandre Belloni
5dca80f63e watchdog: sama5d4: Add comment explaining what happens on resume
Because suspending to RAM may lose the register values, they are restored
on resume. This is currently done unconditionally because there is
currently no way to know (from the driver) whether they have really been
lost or are still valid. Writing MR also pings the watchdog and this may
not be what is expected so add a comment explaining why it happens.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.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@iguana.be>
2017-06-05 17:58:39 +02:00
Alexandre Belloni
39bd56df7b watchodg: sama5d4: simplify probe
Because the only way to use the driver is to have a device tree enabling
it, pdev->dev.of_node will never be NULL. Remove the unnecessary check.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.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@iguana.be>
2017-06-05 17:58:30 +02:00
Eric Anholt
fedf266f99 watchdog: bcm281xx: Fix use of uninitialized spinlock.
The bcm_kona_wdt_set_resolution_reg() call takes the spinlock, so
initialize it earlier.  Fixes a warning at boot with lock debugging
enabled.

Fixes: 6adb730dc2 ("watchdog: bcm281xx: Watchdog Driver")
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Florian Fainelli <f.fainelli@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@iguana.be>
2017-05-19 10:42:25 +02:00
Wei Yongjun
07441a7dd1 watchdog: zx2967: remove redundant dev_err call in zx2967_wdt_probe()
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@iguana.be>
2017-05-19 10:42:18 +02:00
Paolo Bonzini
1fccb73011 iTCO_wdt: all versions count down twice
The ICH9 is listed as having TCO v2, and indeed the behavior in the
datasheet corresponds to v2 (for example the NO_REBOOT flag is
accessible via the 16KiB-aligned Root Complex Base Address).

However, the TCO counts twice just like in v1; the documentation
of the SECOND_TO_STS bit says: "ICH9 sets this bit to 1 to indicate
that the TIMEOUT bit had been (or is currently) set and a second
timeout occurred before the TCO_RLD register was written. If this
bit is set and the NO_REBOOT config bit is 0, then the ICH9 will
reboot the system after the second timeout.  The same can be found
in the BayTrail (Atom E3800) datasheet, and even HOWTOs around
the Internet say that it will reboot after _twice_ the specified
heartbeat.

I did not find the Apollo Lake datasheet, but because v4/v5 has
a SECOND_TO_STS bit just like the previous version I'm enabling
this for Apollo Lake as well.

Cc: linux-watchdog@vger.kernel.org
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.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@iguana.be>
2017-05-19 10:42:11 +02:00
Shile Zhang
455a9a60b6 watchdog: wdt_pci: fix build error if define SOFTWARE_REBOOT
To fix following build error when SOFTWARE_REBOOT is defined:

  CC [M]  driver/watchdog/wdt_pci.o
driver/watchdog/wdt_pci.c: In function 'wdtpci_interrupt':
driver/watchdog/wdt_pci.c:335:3: error: too many arguments to function 'emergency_restart'
   emergency_restart(NULL);
   ^
In file included from driver/watchdog/wdt_pci.c:51:0:
include/linux/reboot.h:80:13: note: declared here
 extern void emergency_restart(void);
             ^

Signed-off-by: Shile Zhang <shile.zhang@nokia.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@iguana.be>
2017-05-18 18:51:44 +02:00
Tomas Melin
0ddad77b90 watchdog: cadence_wdt: fix timeout setting
wdt_timeout must not be initialized to CDNS_WDT_DEFAULT_TIMEOUT in
order to allow the value to be overriddden by a device tree setting.

This way, the default timeout value will be used only in case module_param
has not been set, or device tree timeout-sec has not been defined.

Signed-off-by: Tomas Melin <tomas.melin@vaisala.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@iguana.be>
2017-05-18 18:51:38 +02:00
Johan Hovold
46c319b848 watchdog: pcwd_usb: fix NULL-deref at probe
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.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@iguana.be>
2017-05-18 18:51:34 +02:00
Alexandre Belloni
ddd6d240b2 watchdog: sama5d4: fix race condition
WDT_MR and WDT_CR must not updated within three slow clock periods after
the last ping (write to WDT_CR or WDT_MR). Ensure enough time has elapsed
before writing those registers.
wdt_write() waits for 4 periods to ensure at least 3 edges are seen by the
IP.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou.Yang <wenyou.yang@microchip.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-05-18 18:51:24 +02:00
Alexandre Belloni
015b528644 watchdog: sama5d4: fix WDDIS handling
The datasheet states: "When setting the WDDIS bit, and while it is set, the
fields WDV and WDD must not be modified."

Because the whole configuration is already cached inside .mr, wait for the
user to enable the watchdog to configure it so it is enabled and configured
at the same time (what the IP is actually expecting).

When the watchdog is already enabled, it is not an issue to reconfigure it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou.Yang <wenyou.yang@microchip.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-05-18 18:51:21 +02:00
Arnd Bergmann
d8f1deaa52 watchdog: orion: fix compile-test dependencies
I ran into one corner case with the orion watchdog using the
atomic_io_modify interface:

drivers/watchdog/orion_wdt.o: In function `orion_stop':
orion_wdt.c:(.text.orion_stop+0x28): undefined reference to `atomic_io_modify'
drivers/watchdog/orion_wdt.o: In function `armada375_stop':
orion_wdt.c:(.text.armada375_stop+0x28): undefined reference to `atomic_io_modify'

This function is available on all 32-bit ARM builds except for ebsa110, so
we have to specifically exclude that from compile-testing.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2017-05-18 18:51:15 +02:00
Linus Torvalds
291b38a756 Annotation of module parameters that specify device settings
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Merge tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull hw lockdown support from David Howells:
 "Annotation of module parameters that configure hardware resources
  including ioports, iomem addresses, irq lines and dma channels.

  This allows a future patch to prohibit the use of such module
  parameters to prevent that hardware from being abused to gain access
  to the running kernel image as part of locking the kernel down under
  UEFI secure boot conditions.

  Annotations are made by changing:

        module_param(n, t, p)
        module_param_named(n, v, t, p)
        module_param_array(n, t, m, p)

  to:

        module_param_hw(n, t, hwtype, p)
        module_param_hw_named(n, v, t, hwtype, p)
        module_param_hw_array(n, t, hwtype, m, p)

  where the module parameter refers to a hardware setting

  hwtype specifies the type of the resource being configured. This can
  be one of:

        ioport          Module parameter configures an I/O port
        iomem           Module parameter configures an I/O mem address
        ioport_or_iomem Module parameter could be either (runtime set)
        irq             Module parameter configures an I/O port
        dma             Module parameter configures a DMA channel
        dma_addr        Module parameter configures a DMA buffer address
        other           Module parameter configures some other value

  Note that the hwtype is compile checked, but not currently stored (the
  lockdown code probably won't require it). It is, however, there for
  future use.

  A bonus is that the hwtype can also be used for grepping.

  The intention is for the kernel to ignore or reject attempts to set
  annotated module parameters if lockdown is enabled. This applies to
  options passed on the boot command line, passed to insmod/modprobe or
  direct twiddling in /sys/module/ parameter files.

  The module initialisation then needs to handle the parameter not being
  set, by (1) giving an error, (2) probing for a value or (3) using a
  reasonable default.

  What I can't do is just reject a module out of hand because it may
  take a hardware setting in the module parameters. Some important
  modules, some ipmi stuff for instance, both probe for hardware and
  allow hardware to be manually specified; if the driver is aborts with
  any error, you don't get any ipmi hardware.

  Further, trying to do this entirely in the module initialisation code
  doesn't protect against sysfs twiddling.

  [!] Note that in and of itself, this series of patches should have no
      effect on the the size of the kernel or code execution - that is
      left to a patch in the next series to effect. It does mark
      annotated kernel parameters with a KERNEL_PARAM_FL_HWPARAM flag in
      an already existing field"

* tag 'hwparam-20170420' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: (38 commits)
  Annotate hardware config module parameters in sound/pci/
  Annotate hardware config module parameters in sound/oss/
  Annotate hardware config module parameters in sound/isa/
  Annotate hardware config module parameters in sound/drivers/
  Annotate hardware config module parameters in fs/pstore/
  Annotate hardware config module parameters in drivers/watchdog/
  Annotate hardware config module parameters in drivers/video/
  Annotate hardware config module parameters in drivers/tty/
  Annotate hardware config module parameters in drivers/staging/vme/
  Annotate hardware config module parameters in drivers/staging/speakup/
  Annotate hardware config module parameters in drivers/staging/media/
  Annotate hardware config module parameters in drivers/scsi/
  Annotate hardware config module parameters in drivers/pcmcia/
  Annotate hardware config module parameters in drivers/pci/hotplug/
  Annotate hardware config module parameters in drivers/parport/
  Annotate hardware config module parameters in drivers/net/wireless/
  Annotate hardware config module parameters in drivers/net/wan/
  Annotate hardware config module parameters in drivers/net/irda/
  Annotate hardware config module parameters in drivers/net/hamradio/
  Annotate hardware config module parameters in drivers/net/ethernet/
  ...
2017-05-10 19:13:03 -07:00
Laura Abbott
23f19a563b drivers/watchdog/hpwdt.c: use set_memory.h header
set_memory_* functions have moved to set_memory.h.  Switch to this
explicitly.

Link: http://lkml.kernel.org/r/1488920133-27229-10-git-send-email-labbott@redhat.com
Signed-off-by: Laura Abbott <labbott@redhat.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-05-08 17:15:14 -07:00
Kuppuswamy Sathyanarayanan
140c91b26e watchdog: iTCO_wdt: Add PMC specific noreboot update api
In some SoCs, setting noreboot bit needs modification to
PMC GC registers. But not all PMC drivers allow other drivers
to memory map their GC region. This could create mem request
conflict in watchdog driver. So this patch adds facility to allow
PMC drivers to pass noreboot update function to watchdog
drivers via platform data.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2017-04-28 21:51:28 +03:00
Kuppuswamy Sathyanarayanan
f583a884af watchdog: iTCO_wdt: cleanup set/unset no_reboot_bit functions
iTCO_wdt no_reboot_bit set/unset functions has lot of common code between
them. So merging these two functions into a single update function would
remove these unnecessary code duplications. This patch fixes this issue
by creating a no_reboot_bit update function to handle both set/unset
functions.

Also checking for iTCO version every time you make no_reboot_bit set/unset
call is inefficient and makes the code look complex. This can be improved
by performing this check once during device probe and selecting the
appropriate no_reboot_bit update function. This patch fixes this issue
by splitting the update function into multiple helper functions.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2017-04-28 21:51:27 +03:00
David Howells
5d1c93ce21 Annotate hardware config module parameters in drivers/watchdog/
When the kernel is running in secure boot mode, we lock down the kernel to
prevent userspace from modifying the running kernel image.  Whilst this
includes prohibiting access to things like /dev/mem, it must also prevent
access by means of configuring driver modules in such a way as to cause a
device to access or modify the kernel image.

To this end, annotate module_param* statements that refer to hardware
configuration and indicate for future reference what type of parameter they
specify.  The parameter parser in the core sees this information and can
skip such parameters with an error message if the kernel is locked down.
The module initialisation then runs as normal, but just sees whatever the
default values for those parameters is.

Note that we do still need to do the module initialisation because some
drivers have viable defaults set in case parameters aren't specified and
some drivers support automatic configuration (e.g. PNP or PCI) in addition
to manually coded parameters.

This patch annotates drivers in drivers/watchdog/.

Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
cc: Wim Van Sebroeck <wim@iguana.be>
cc: Zwane Mwaikambo <zwanem@gmail.com>
cc: linux-watchdog@vger.kernel.org
2017-04-20 12:02:32 +01:00
Arnd Bergmann
9ad82f117f watchdog: retu: restore MFD dependency
The retu watchdog calls into the respective mfd driver, but fails to
link if that is diabled:

drivers/watchdog/built-in.o: In function `retu_wdt_set_timeout':
ziirave_wdt.c:(.text+0x8c88): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8c88): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
drivers/watchdog/built-in.o: In function `retu_wdt_start':
ziirave_wdt.c:(.text+0x8cc8): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8cc8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'

This restores the dependency as it was before

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
9297b652bd watchdog: db8500: add back prmcu dependency
When the db8500 watchdog is enabled without the PRCMU, we get a lot of
warnings about duplicate or missing helper functions:

In file included from drivers/watchdog/ux500_wdt.c:21:0:
include/linux/mfd/dbx500-prcmu.h:422:19: error: redefinition of 'prcmu_abb_read'
 static inline int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)

This restores the dependency as it was.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
3736d4eb6a watchdog: kempld: fix gcc-4.3 build
gcc-4.3 can't decide whether the constant value in
kempld_prescaler[PRESCALER_21] is built-time constant or
not, and gets confused by the logic in do_div():

drivers/watchdog/kempld_wdt.o: In function `kempld_wdt_set_stage_timeout':
kempld_wdt.c:(.text.kempld_wdt_set_stage_timeout+0x130): undefined reference to `__aeabi_uldivmod'

This adds a call to ACCESS_ONCE() to force it to not consider
it to be constant, and leaves the more efficient normal case
in place for modern compilers, using an #ifdef to annotate
why we do this hack.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Niklas Cassel
8d5755b3f7 watchdog: softdog: fire watchdog even if softirqs do not get to run
Checking for timer expiration is done from the softirq TIMER_SOFTIRQ.

Since commit 4cd13c21b2 ("softirq: Let ksoftirqd do its job"),
pending softirqs are no longer always handled immediately, instead,
if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING,
the handling of the softirqs are deferred, and are instead supposed
to be handled by ksoftirqd, when ksoftirqd gets scheduled.

If a user space process with a real-time policy starts to misbehave
by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING,
what will happen is that all softirqs will get deferred, while ksoftirqd,
which is supposed to handle the deferred softirqs, will never get to run.

To make sure that the watchdog is able to fire even when we do not get
to run softirqs, replace the timers with hrtimers.

Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
ed4a9eca66 watchdog: kempld: revert to full dependency
The kempld watchdog driver requires the respective MFD driver:

drivers/watchdog/built-in.o: In function `kempld_wdt_probe':
kempld_wdt.c:(.text+0x5c78): undefined reference to `kempld_get_mutex'
kempld_wdt.c:(.text+0x5c84): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5c8e): undefined reference to `kempld_release_mutex'
kempld_wdt.c:(.text+0x5d1c): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5d2c): undefined reference to `kempld_write8'

This adds the Kconfig dependency back.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
2672b7e01a watchdog: bcm2835: add CONFIG_OF dependency
Without CONFIG_OF, the driver fails to link:

drivers/watchdog/built-in.o: In function `bcm2835_power_off':
bcm2835_wdt.c:(.text+0x1946): undefined reference to `of_find_device_by_node'

This adds a new dependency, to allow the COMPILE_TEST check to succeed.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
3eafee9564 watchdog: sp805: add back AMBA dependency
The driver fails to link if ARM_AMBA is disabled:

drivers/watchdog/sp805_wdt.o: In function `sp805_wdt_driver_init':
sp805_wdt.c:(.init.text+0x4): undefined reference to `amba_driver_register'

It seems that the COMPILE_TEST was added in the wrong place, as there
is no architecture dependency, but a bus dependency. This moves
the dependency accordingly.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
6fb303a81a watchdog: menf21bmc: add I2C dependency
This driver fails to link when CONFIG_I2C is disabled or a loadable module while
the watchdog is built-in:

drivers/watchdog/built-in.o: In function `menf21bmc_wdt_shutdown':
menf21bmc_wdt.c:(.text+0x9b44): undefined reference to `i2c_smbus_write_word_data'
menf21bmc_wdt.c:(.text+0x9b44): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `i2c_smbus_write_word_data'

This adds a Kconfig dependency for it, to enforce a valid configuration.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
0369fdf2e1 watchdog: geode: restore hard CS5535_MFGPT dependency
Wtihout CONFIG_CS5535_MFGPT, the driver does not link right:

drivers/watchdog/built-in.o: In function `geodewdt_probe':
geodewdt.c:(.init.text+0xca3): undefined reference to `cs5535_mfgpt_alloc_timer'
geodewdt.c:(.init.text+0xcd4): undefined reference to `cs5535_mfgpt_write'
geodewdt.c:(.init.text+0xcef): undefined reference to `cs5535_mfgpt_toggle_event'

This adds back the dependency on this base driver.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Arnd Bergmann
d0e32fba85 watchdog: wm831x watchdog really needs mfd
The wm831x watchdog driver can now be built without the wm831x mfd
driver, which results in a link error:

(.text+0x1a95c): undefined reference to `wm831x_set_bits'
(.text+0x1a95c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_set_bits'
(.text+0x1a968): undefined reference to `wm831x_reg_lock'
(.text+0x1a968): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_lock'
(.text+0x1a9dc): undefined reference to `wm831x_reg_unlock'
(.text+0x1a9dc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_unlock'

This adds back the dependency that was removed. We can still build test
this driver on all architectures by enabling the MFD driver for it first.

Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-03-01 06:15:10 -08:00
Masahiro Yamada
8ab102d60a scripts/spelling.txt: add "partiton" pattern and fix typo instances
Fix typos and add the following to the scripts/spelling.txt:

  partiton||partition

Link: http://lkml.kernel.org/r/1481573103-11329-7-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-27 18:43:46 -08:00
Krzysztof Kozlowski
e3a60ead2c watchdog: s3c2410: Add prefix to local function
Functions marked static inline might not be inlined so a driver-specific
prefix for function name helps when looking through call backtrace.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-02-24 14:00:23 -08:00
Krzysztof Kozlowski
53eac48d5c watchdog: s3c2410: Select MFD_SYSCON on all Exynos platforms
Syscon is used not only on Exynos5 SoCs but also on Exynos3250,
Exynos4412 and ARMv8 versions (Exynos5433, Exynos7).

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-02-24 14:00:23 -08:00
Krzysztof Kozlowski
456f53d652 watchdog: s3c2410: Use dev_dbg instead of pr_info
Replace the 'debug' module parameter and pr_info() with proper device
dynamic debug calls because this is the preferred and flexible way of
enabling debugging printks.

Also remove some obvious debug printks.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-02-24 14:00:23 -08:00
Krzysztof Kozlowski
0b445549ea watchdog: s3c2410: Fix infinite interrupt in soft mode
In soft (no-reboot) mode, the driver self-pings watchdog upon expiration
of an interrupt.  However the interrupt itself was not cleared thus on
first hit, the system enters infinite interrupt handling loop.

On Odroid U3 (Exynos4412), when booted with s3c2410_wdt.soft_noboot=1
argument the console is flooded:
	# killall -9 watchdog
	[   60.523760] s3c2410-wdt 10060000.watchdog: watchdog timer expired (irq)
	[   60.536744] s3c2410-wdt 10060000.watchdog: watchdog timer expired (irq)

Fix this by writing something to the WTCLRINT register to clear the
interrupt.  The register WTCLRINT however appeared in S3C6410 so a new
watchdog quirk and flavor are needed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-02-24 14:00:23 -08:00
Krzysztof Kozlowski
4f21195d42 watchdog: s3c2410: Remove confusing CONFIG prefix from local defines
The CONFIG prefix from defines in the s3c2410_wdt.c might suggest that
these constants come from Kconfig.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2017-02-24 14:00:23 -08:00