diff options
| author | Guenter Roeck <groeck@chromium.org> | 2016-04-05 02:37:46 +0200 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2016-05-14 09:08:01 +0200 |
| commit | b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b (patch) | |
| tree | ad72b98e55b0b1cd6d537b9f3951fc1e48872804 /drivers/watchdog/qcom-wdt.c | |
| parent | Linux 4.6-rc7 (diff) | |
| download | linux-b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b.tar.xz linux-b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b.zip | |
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/qcom-wdt.c')
| -rw-r--r-- | drivers/watchdog/qcom-wdt.c | 7 |
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 |