[PATCH v2 1/2] watchdog: orion_wdt: load the pretimeout counter on Armada 370/XP start

[Igor Velkov via B4 Relay]

From: Igor Velkov <iav at iav.lv>

armada370_start() enables TIMER1 for the pretimeout but, unlike
armada375_start(), does not load its counter, so TIMER1 runs down from
whatever value it holds and the pretimeout can fire early. Of the boards
that use armada370_start(), only Armada XP and 98DX3236 describe the
pretimeout interrupt in their device tree.

Load TIMER1 on start the same way armada375_start() does.

Fixes: 7a6b3d8a432d ("watchdog: orion_wdt: support pretimeout on Armada-XP")
Link: https://sashiko.dev/#/patchset/20261012-orion-wdt-suspend-v1-1-1676cb79e29e@iav.lv?part=1
Assisted-by: LLM
Signed-off-by: Igor Velkov <iav at iav.lv>
---
 drivers/watchdog/orion_wdt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index 5d56e93f0406..ef64e3730001 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -232,6 +232,9 @@ static int armada370_start(struct watchdog_device *wdt_dev)
 	/* Set watchdog duration */
 	writel(dev->clk_rate * wdt_dev->timeout,
 	       dev->reg + dev->data->wdt_counter_offset);
+	if (dev->wdt.info->options & WDIOF_PRETIMEOUT)
+		writel(dev->clk_rate * (wdt_dev->timeout - wdt_dev->pretimeout),
+		       dev->reg + TIMER1_VAL_OFF);
 
 	/* Clear the watchdog expiration bit */
 	atomic_io_modify(dev->reg + TIMER_A370_STATUS, WDT_A370_EXPIRED, 0);

-- 
2.43.0