[PATCH v3 0/4] ARM: stm32mp: implement watchdog/reset handling

Ahmad Fatoum a.fatoum at pengutronix.de
Mon Jun 17 07:34:14 PDT 2019


Originally, I thought about having poller enabled by default if the
watchdog was active at barebox probe time, but I can't find a way
to check if the IWDG is active or not, thus the driver probe doesn't
touch the watchdog hardware anymore.

Changes since v2:
 * Dropped already applied patches from v2
 * reran savedefconfig as prep and added the commit
 * documented BROWNOUT reason in Documentation/
 * removed enabling watchdog by default
 * renamed the file to stm32_wdt.c to stm32_iwdg.c, because there is
   a distinct stm32_wwdg Watchdog as well
 * dropped &iwdg2 { status = "okay"; } because it's now part of the
   upstream device tree

Changes since v1:
 * renamed BOR reset reason to BROWNOUT
 * replaced leading spaces with tabs
 * s/of_clk_get_by_name/clk_get/ in probe
 * moved RCC reset reason bit definitions into stm32_wdt.c
 * removed unnecessary indentation/alignment
 * had failures of reset reason & handler only print a warning
   but not fail the driver probe. All of these by Sascha
 * fixed an instance of stm32mp1 after the subarch was renamed
   to stm32mp, Spotted by Sam
 * Shortened the Kconfig label text for IWDG. Suggested by Roland
 * Dropped low level UART setup. It was incomplete and will be
   included in the first stage supprot patchset instead.

Ahmad Fatoum (4):
  ARM: stm32mp1: rerun savedefconfig on stm32mp_defconfig
  Documentation: reset-reason: document new BROWNOUT reason
  watchdog: add stm32 watchdog and reset driver
  ARM: stm32mp: enable watchdog in oftree and defconfig

 Documentation/user/reset-reason.rst |   4 +
 arch/arm/configs/stm32mp_defconfig  |   6 +-
 arch/arm/dts/stm32mp157c-dk2.dts    |   4 +
 drivers/watchdog/Kconfig            |   8 +
 drivers/watchdog/Makefile           |   1 +
 drivers/watchdog/stm32_iwdg.c       | 298 ++++++++++++++++++++++++++++
 6 files changed, 319 insertions(+), 2 deletions(-)
 create mode 100644 drivers/watchdog/stm32_iwdg.c

-- 
2.20.1




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