linux-toradex.git/drivers/watchdog, branch v4.20

watchdog: ts4800: release syscon device node in ts4800_wdt_probe()

2018-10-22T08:16:28+00:00

Put syscon device node when it is not needed anymore.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: armada_37xx_wdt: use do_div for u64 division

2018-10-13T13:19:43+00:00

When the driver is built on 32 bit architectures during compile test,
the linker complains about "__udivdi3" being undefined. We have to use
do_div macro instead of the division operator when dividing u64 value.

Signed-off-by: Marek Behún 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: Add support for Armada 37xx CPU watchdog

2018-10-13T13:19:39+00:00

This adds support for the CPU watchdog found on Marvell Armada 37xx
SoCs.

There are 4 counters which can be set as CPU watchdog counters.
This driver uses the second counter (ID 1, counting from 0) as watchdog
counter, and first counter (ID 0) to implement pinging on the second
counter without the need to disable it.

Since counters IDs 2 and 3 are enabled already before even U-Boot
starts, this driver does not use them at all, for example by adding a
device tree property for counter selection.

Signed-off-by: Marek Behún 
Reviewed-by: Guenter Roeck 
Tested-by: Miquel Raynal 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: mpc8xxx: provide boot status

2018-10-13T13:19:38+00:00

mpc8xxx watchdog driver supports the following platforms:
- mpc8xx
- mpc83xx
- mpc86xx

Those three platforms have a 32 bits register which provides the
reason of the last boot, including whether it was caused by the
watchdog.

mpc8xx: Register RSR, bit SWRS (bit 3)
mpc83xx: Register RSR, bit SWRS (bit 28)
mpc86xx: Register RSTRSCR, bit WDT_RR (bit 11)

This patch maps the register as defined in the device tree and updates
wdt.bootstatus based on the value of the watchdog related bit. Then
the information can be retrieved via the WDIOC_GETBOOTSTATUS ioctl.

Hereunder is an example of devicetree for mpc8xx,
the Reset Status Register being at offset 0x288:

		WDT: watchdog@0 {
			compatible = "fsl,mpc823-wdt";
			reg = <0x0 0x10 0x288 0x4>;
		};

On the mpc83xx, RSR is at offset 0x910
On the mpc86xx, RSTRSCR is at offset 0xe0094

Suggested-by: Radu Rendec 
Tested-by: Christophe Leroy  # On mpc885
Signed-off-by: Christophe Leroy 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: rza_wdt: Support longer timeouts

2018-10-02T11:32:29+00:00

The RZ/A2 watchdog timer extends the clock source options in order to
allow for longer timeouts.

Signed-off-by: Chris Brandt 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: hpwdt: Disable PreTimeout when Timeout is smaller

2018-10-02T11:32:28+00:00

During module install, disable pretimeout if the requested timeout
value is not greater than the minimal pretimeout value that is
supported by hardware.

This makes the module load handling of pretimeout consistent
with the ioctl handling of pretimeout.

Signed-off-by: Jerry Hoemann 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: w83627hf_wdt: Support NCT6796D, NCT6797D, NCT6798D

2018-10-02T11:32:28+00:00

The watchdog controller on NCT6796D, NCT6797D, and NCT6798D is compatible
with the wtachdog controller on other Nuvoton chips.

Signed-off-by: Guenter Roeck 
Reviewed-by: Wim Van Sebroeck 
Signed-off-by: Wim Van Sebroeck

watchdog: mpc8xxx: use dev_xxxx() instead of pr_xxxx()

2018-10-02T11:32:28+00:00

mpc8xxx watchdog driver is a platform device drivers, it is
therefore possible to use dev_xxx() messaging rather than pr_xxx()

Signed-off-by: Christophe Leroy 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: lantiq: add get_timeleft callback

2018-10-02T11:32:27+00:00

This callback will provide the current time left.

Signed-off-by: Hauke Mehrtens 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck

watchdog: lantiq: Convert to watchdog_device

2018-10-02T11:32:26+00:00

Instead of doing the ioctl handling manually just use register a
watchdog_device and let the watchdog framework do the ioctl handling.

This also removes the ltq_wdt_bootstatus_set typedef and replaces it
with a structure providing the chip specific functions pointer.
The watchdog_init_timeout() function is now used and the initial timeout
can be provided in device tree.
If the watchdog was already activated it will not be stopped any more,
but the settings from the driver will be used and the watchdog subsystem
will take care.

Signed-off-by: Hauke Mehrtens 
Reviewed-by: Guenter Roeck 
Signed-off-by: Guenter Roeck 
Signed-off-by: Wim Van Sebroeck