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[v6,00/12] handling all DM watchdogs in watchdog_reset()

Message ID 20210819095706.3585923-1-rasmus.villemoes@prevas.dk
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Series handling all DM watchdogs in watchdog_reset() | expand

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Rasmus Villemoes Aug. 19, 2021, 9:56 a.m. UTC 
This series is an attempt at expanding the wdt-uclass provided
watchdog_reset() to handle all DM watchdogs, not just the first
one. Some of the ad hoc work done for the first DM watchdog in
initr_watchdog() is now moved to a .pre_probe hook so it is
automatically done for all devices.

It also includes a patch adding a driver for a gpio-petted watchdog
device (and a sandbox test of that) - it is included here because that
also gives a relatively easy way to have more than one (kind of)
watchdog device in the sandbox, which is then used at the end to test
that watchdog_reset() behaves as expected.

v2: https://lore.kernel.org/u-boot/20210527220017.1266765-1-rasmus.villemoes@prevas.dk/

v3: https://lore.kernel.org/u-boot/20210702124510.124401-1-rasmus.villemoes@prevas.dk/

v4: https://lore.kernel.org/u-boot/20210802150016.588750-1-rasmus.villemoes@prevas.dk/

v5: https://lore.kernel.org/u-boot/20210811124800.2593226-1-rasmus.villemoes@prevas.dk/

Changes in v6: Make wdt_stop_all() return the first error encountered
(if any), yet still visit all watchdog devices.

Rasmus Villemoes (12):
  watchdog: wdt-uclass.c: use wdt_start() in wdt_expire_now()
  watchdog: wdt-uclass.c: introduce struct wdt_priv
  watchdog: wdt-uclass.c: neaten UCLASS_DRIVER definition
  watchdog: wdt-uclass.c: refactor initr_watchdog()
  watchdog: wdt-uclass.c: keep track of each device's running state
  sandbox: disable CONFIG_WATCHDOG_AUTOSTART
  watchdog: wdt-uclass.c: add wdt_stop_all() helper
  board: x530: switch to wdt_stop_all()
  watchdog: wdt-uclass.c: handle all DM watchdogs in watchdog_reset()
  watchdog: add gpio watchdog driver
  sandbox: add test of wdt_gpio driver
  sandbox: add test of wdt-uclass' watchdog_reset()

 arch/sandbox/dts/test.dts                     |   8 +
 board/alliedtelesis/x530/x530.c               |   5 +-
 configs/sandbox64_defconfig                   |   2 +
 configs/sandbox_defconfig                     |   2 +
 .../watchdog/gpio-wdt.txt                     |  19 ++
 drivers/watchdog/Kconfig                      |   9 +
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/gpio_wdt.c                   |  68 +++++++
 drivers/watchdog/wdt-uclass.c                 | 192 +++++++++++++-----
 include/asm-generic/global_data.h             |   6 -
 include/wdt.h                                 |   8 +
 test/dm/wdt.c                                 |  90 +++++++-
 12 files changed, 349 insertions(+), 61 deletions(-)
 create mode 100644 doc/device-tree-bindings/watchdog/gpio-wdt.txt
 create mode 100644 drivers/watchdog/gpio_wdt.c