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From abc9f55079169806bcc31f29ec27f7df11c6184c Mon Sep 17 00:00:00 2001
From: Ram Chandra Jangir <rjangi@codeaurora.org>
Date: Thu, 4 Feb 2016 12:41:56 +0530
Subject: [PATCH 2/2] watchdog: qcom: set WDT_BARK_TIME register offset to one
second less of bite time
Currently WDT_BARK_TIME register offset is not configured with bark
timeout during wdt_start,and it is taking bark timeout's default value.
For some versions of TZ (secure mode) will consider a BARK the same
as BITE and reset the board.
So instead let's just configure the BARK time to be less than a second
of the bite timeout so the board does not reset in this scenario
Change-Id: Ie09850ad7e0470ed721e6924911ca2a81fd9ff8a
Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>
---
drivers/watchdog/qcom-wdt.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index 773dcfa..002274a 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -22,6 +22,7 @@
#define WDT_RST 0x38
#define WDT_EN 0x40
+#define WDT_BARK_TIME 0x4C
#define WDT_BITE_TIME 0x5C
struct qcom_wdt {
@@ -44,6 +45,7 @@ static int qcom_wdt_start(struct watchdog_device *wdd)
writel(0, wdt->base + WDT_EN);
writel(1, wdt->base + WDT_RST);
+ writel((wdd->timeout - 1) * wdt->rate, wdt->base + WDT_BARK_TIME);
writel(wdd->timeout * wdt->rate, wdt->base + WDT_BITE_TIME);
writel(1, wdt->base + WDT_EN);
return 0;
--
2.7.2
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