u-boot.git/drivers/watchdog, branch v2020.01

watchdog: imx: Use immediate reset bits for expire_now

2019-11-03T16:04:16+00:00

The expire_now function was previously setting the watchdog timeout to
minimum and waiting for the watchdog to expire. However, this watchdog
also has bits to trigger immediate reset. Use those instead, like the
Linux imx2_wdt driver does.

Signed-off-by: Robert Hancock

watchdog: imx: Add DT ext-reset handling

2019-11-03T16:04:16+00:00

The Linux imx2_wdt driver uses a fsl,ext-reset-output boolean in the
device tree to specify whether the board design should use the external
reset instead of the internal reset. Use this boolean to determine which
mode to use rather than using external reset unconditionally.

For the legacy non-DM mode, the external reset is always used in order
to maintain the previous behavior.

Signed-off-by: Robert Hancock

watchdog: move WATCHDOG_TIMEOUT_MSECS to Kconfig

2019-10-08T05:46:38+00:00

move WATCHDOG_TIMEOUT_MSECS to Kconfig and fix
all board defconfigs.

Signed-off-by: Heiko Schocher 
Reviewed-by: Stefan Roese 
Acked-by: Lukasz Majewski 
Acked-by: Martyn Welch 
Signed-off-by: Stefan Roese

watchdog: omap_wdt: Fix WDT target reset when booted from emmc

2019-09-19T16:54:29+00:00

AM335X based beaglebone black target gets reset by DM converted watchdog
if booted from emmc around 60sec. Fixed this by moving driver's private struct
variable initialization at different places in the driver to driver's probe.
Tested on Beaglebone Black.

Cc: Grygorii Strashko 
Fixes: 7659ea32 ("watchdog: omap_wdt: Convert watchdog driver to use DT and DM")
Reported-by: Sam Protsenko 
Signed-off-by: Suniel Mahesh 
Acked-by: Grygorii Strashko 
Reviewed-by: Sam Protsenko

watchdog: sp805_wdt: add expire_now method

2019-09-12T10:45:42+00:00

Add sp805_wdt_expire_now function.
expire_now method is required by U_BOOT_DRIVER.

Signed-off-by: Thomas Schaefer 
Signed-off-by: Zhao Qiang 
Reviewed-by: Priyanka Jain

watchdog: omap_wdt: Disable DM watchdog support in SPL

2019-08-12T17:27:55+00:00

This patch disables DM watchdog support for SPL builds and uses
the legacy omap watchdog driver on TI AM335x chipsets.

The following build error is reported if DM watchdog support was
enabled in SPL:

  CC      spl/drivers/usb/gadget/rndis.o
  LD      spl/drivers/usb/gadget/built-in.o
  LD      spl/drivers/usb/musb-new/built-in.o
  LD      spl/drivers/built-in.o
  LD      spl/u-boot-spl
arm-linux-ld.bfd: u-boot-spl section .u_boot_list will not fit in region .sram
arm-linux-ld.bfd: region .sram overflowed by 440 bytes
make[1]: *** [spl/u-boot-spl] Error 1
make: *** [spl/u-boot-spl] Error 2

Adjusted WATCHDOG_RESET macro accordingly. Earlier it was pointing
to hw_watchdog_reset. Since CONFIG_WATCHDOG replaces CONFIG_HW_WATCHDOG,
now WATCHDOG_RESET macro points to watchdog_reset. This watchdog_reset
is not defined anywhere for am33xx/omap2 and needs to be defined. Fixed
this by simply calling hw_watchdog_reset in watchdog_reset.

Built and tested on AM335x device (BeagleboneBlack), compile tested for
all other AM33xx/omap2 based boards.

Signed-off-by: Suniel Mahesh 
[trini: Fix watchdog.h logic]
Signed-off-by: Tom Rini

watchdog: omap_wdt: Convert watchdog driver to use DT and DM

2019-08-12T11:25:22+00:00

This patch adds device tree and driver model watchdog support,
converts the legacy omap watchdog driver to driver model for
TI AM335x chipsets. The following compile warning is removed:

===================== WARNING ======================
This board does not use CONFIG_WDT (DM watchdog support).
Please update the board to use CONFIG_WDT before the
v2019.10 release.
Failure to update by the deadline may result in board removal.
See doc/driver-model/MIGRATION.txt for more info.
====================================================

CONFIG_HW_WATCHDOG is no more a default option for AM33XX devices
after DT/DM conversion, adjusted kconfig accordingly.

DM watchdog support is enabled by default in SPL. The SPL image
doesn't fit into SRAM because of size constraints and build breaks
with an overflow. For this reason DM watchdog support should be
disabled in SPL, driver code should be adjusted accordingly to serve
this purpose.
Built and tested on AM335x device (BeagleboneBlack), compile tested
for all other AM33xx based boards.

Signed-off-by: Suniel Mahesh

watchdog: mtk_wdt: Cosmetic cleanup of latest changes

2019-08-05T09:50:11+00:00

This patch cleans up some coding style related issues in the mtk_wtd
driver to make this driver comply again with the U-Boot coding style
standards.

The only minimal functional change is that the timeout parameter is now
passed in (u64) instead of (unsigned int) from mtk_wdt_start() to
mtk_wdt_set_timeout(), preserving the original value.

Signed-off-by: Stefan Roese 
Cc: Shannon Barber 
Cc: Ryder Lee 
Cc: Matthias Brugger 
Cc: Frank Wunderlich 
Reviewed-by: Matthias Brugger

watchdog: bcm2835_wdt: Remove unused BCM283x watchdog driver and its references

2019-08-05T09:50:06+00:00

The BCM2835/2836 watchdog is not used in mainline U-Boot at all. This
patch removes the driver and its references (CONFIG_BCM2835_WDT)
completely.

Signed-off-by: Stefan Roese 
Cc: Paolo Pisati

watchdog: imx: Add DM support

2019-07-19T18:14:50+00:00

Add DM and DT probing support to iMX watchdog driver. This should
allow boards to move over to this driver, enable SYSRESET_WATCHDOG
to handle cpu_reset() if required.

Signed-off-by: Marek Vasut 
Cc: Peng Fan 
Cc: Stefano Babic 
Tested-by: Heiko Schocher