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authorGuenter Roeck <groeck@chromium.org>2016-04-04 17:37:46 -0700
committerWim Van Sebroeck <wim@iguana.be>2016-05-14 09:08:01 +0200
commitb6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b (patch)
treead72b98e55b0b1cd6d537b9f3951fc1e48872804 /drivers/watchdog
parent44549e8f5eea4e0a41b487b63e616cb089922b99 (diff)
downloadlinux-b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b.tar.bz2
watchdog: qcom: Report reboot reason
The Qualcom watchdog timer block reports if the system was reset by the watchdog. Pass the information to user space. Reviewed-by: Grant Grundler <grundler@chromium.org> Tested-by: Grant Grundler <grundler@chromium.org> Signed-off-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/qcom-wdt.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index 20563ccb7be0..a043fa4f60e5 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