[PATCH v2 00/10] handling all DM watchdogs in watchdog_reset()

Rasmus Villemoes rasmus.villemoes at prevas.dk
Fri May 28 00:00:07 CEST 2021

This series is an attempt at expanding the wdt-uclass provided
watchdog_reset() to handle all DM watchdogs, not just the first
one. As a sort of nice side effect, it turns out that doing that makes
wdt-uclass fit better into the uclass model, in that we now do the
work that was previously done in the ad hoc initr_watchdog for one
device in .pre_probe and .post_probe hooks instead.

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.

It's called v2 merely because the gpio driver and associated test has
been sent before; all but those two patches (8 and 9) are new. As for
the changes in those compared to the first submission, they are mostly
cosmetic - functionally, the only change is that it now requires the
always-running property in DT.

Rasmus Villemoes (10):
  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
  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 +
 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                   |  69 ++++++++
 drivers/watchdog/wdt-uclass.c                 | 154 +++++++++++-------
 include/asm-generic/global_data.h             |   6 -
 test/dm/wdt.c                                 |  90 +++++++++-
 10 files changed, 298 insertions(+), 62 deletions(-)
 create mode 100644 doc/device-tree-bindings/watchdog/gpio-wdt.txt
 create mode 100644 drivers/watchdog/gpio_wdt.c


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