[PATCH v6 0/3] Add support for WDIOF_CARDRESET on TI AM65x

[huaqian.li at siemens.com]

From: Li Hua Qian <huaqian.li at siemens.com>

The watchdog hardware of TI AM65X platform does not support
WDIOF_CARDRESET feature, add a reserved memory to save the watchdog
reset cause, to know if the board reboot is due to a watchdog reset.

Signed-off-by: Li Hua Qian <huaqian.li at siemens.com>
---
Changes in v6:
- Integrate example with the existing binding.
- Link to v5:
  https://lore.kernel.org/linux-watchdog/20230717064124.1315746-1-huaqian.li@siemens.com

Changes in v5:
- Corret the `Reviewed-by` info.
- Link to v4:
  https://lore.kernel.org/linux-watchdog/20230717040723.1306374-1-huaqian.li@siemens.com

Changes in v4:
- Fix the coding style.
- Add usage note for the reserved memory.
- Link to v3:
  https://lore.kernel.org/linux-watchdog/20230713095127.1230109-1-huaqian.li@siemens.com

Changes in v3:
- Add memory-region back for the reserved memory, and remove reserved
  memory from the watchdog IO address space.
- Add changelog.
- Link to v2:
  https://lore.kernel.org/linux-watchdog/20230711091713.1113010-1-huaqian.li@siemens.com

Changes in v2:
- Remove memory-region and memory-size properties, and bind the reserved
  memory to watchdog IO address space.
- Remove the unnecessary rti_wdt_ioctl.
- Fix the mail list
- Link to v1:
  https://lore.kernel.org/all/3137d87e56ef75ba0b8a923d407b2fecace6ccbd.camel@siemens.com
  v1 had a wrong mail list at the beginning, and the mail thread was
  messed up.

Li Hua Qian (3):
  dt-bindings: watchdog: ti,rti-wdt: Add support for WDIOF_CARDRESET
  arm64: dts: ti: Add reserved memory for watchdog
  watchdog:rit_wdt: Add support for WDIOF_CARDRESET

 .../bindings/watchdog/ti,rti-wdt.yaml         | 28 ++++++++++-
 .../boot/dts/ti/k3-am65-iot2050-common.dtsi   | 10 ++++
 drivers/watchdog/rti_wdt.c                    | 48 +++++++++++++++++++
 3 files changed, 85 insertions(+), 1 deletion(-)

-- 
2.34.1