The Qualcom watchdog timer block reports if the system was reset by the
watchdog. Pass the information to user space.
Cc: Grant Grundler <grundler@xxxxxxxxxxxx>
Signed-off-by: Guenter Roeck <groeck@xxxxxxxxxxxx>
---
drivers/watchdog/qcom-wdt.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index 20563cc..a043fa4 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -21,6 +21,7 @@
#define WDT_RST 0x38
#define WDT_EN 0x40
+#define WDT_STS 0x44
#define WDT_BITE_TIME 0x5C
struct qcom_wdt {
@@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wdt_ops = {
static const struct watchdog_info qcom_wdt_info = {
.options = WDIOF_KEEPALIVEPING
| WDIOF_MAGICCLOSE
- | WDIOF_SETTIMEOUT,
+ | WDIOF_SETTIMEOUT
+ | WDIOF_CARDRESET,
.identity = KBUILD_MODNAME,
};
@@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platform_device *pdev)
wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
wdt->wdd.parent = &pdev->dev;
+ if (readl(wdt->base + WDT_STS) & 1)
+ wdt->wdd.bootstatus = WDIOF_CARDRESET;
+
/*
* If 'timeout-sec' unspecified in devicetree, assume a 30 second
* default, unless the max timeout is less than 30 seconds, then use
--
2.8.0.rc3.226.g39d4020
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