[PATCH v2 0/2] watchdog: sama5d4_wdt: Fix WDDIS handling for SAM9X60 and SAMA7G5

Balakrishnan Sambath
2026-03-02T11:33:43Z

The sama5d4_wdt driver hardcodes AT91_WDT_WDDIS (bit 15) for WDDIS
detection, which is incorrect for SAM9X60 and SAMA7G5 that use bit 12
(AT91_SAM9X60_WDDIS). This series fixes the detection by introducing
a per-device wddis_mask and documents the bit position difference in
the header.

Changes in v2:
- Reorder patches: fix first, documentation second
- Drop patch 3/3, not needed with wddis_mask approach
- Keep AT91_SAM9X60_* register names, drop _LEGACY/_MODERN naming
- Limit header changes to WDDIS comments and datasheet references

Balakrishnan Sambath (2):
watchdog: sama5d4_wdt: Fix WDDIS detection on SAM9X60 and SAMA7G5
watchdog: at91sam9_wdt.h: Document WDDIS bit position per SoC family

drivers/watchdog/at91sam9_wdt.h | 6 +++--
drivers/watchdog/sama5d4_wdt.c | 48 +++++++++++++++------------------
2 files changed, 25 insertions(+), 29 deletions(-)

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2.34.1