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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>
This commit is contained in:
Guenter Roeck 2016-04-04 17:37:46 -07:00 committed by Wim Van Sebroeck
parent 44549e8f5e
commit b6ef36d2c1
1 changed files with 6 additions and 1 deletions
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7
drivers/watchdog/qcom-wdt.c
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@ -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