Commit b6ef36d2 authored by Guenter Roeck's avatar Guenter Roeck Committed by Wim Van Sebroeck

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: default avatarGrant Grundler <grundler@chromium.org>
Tested-by: default avatarGrant Grundler <grundler@chromium.org>
Signed-off-by: default avatarGuenter Roeck <groeck@chromium.org>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 44549e8f
...@@ -21,6 +21,7 @@ ...@@ -21,6 +21,7 @@
#define WDT_RST 0x38 #define WDT_RST 0x38
#define WDT_EN 0x40 #define WDT_EN 0x40
#define WDT_STS 0x44
#define WDT_BITE_TIME 0x5C #define WDT_BITE_TIME 0x5C
struct qcom_wdt { struct qcom_wdt {
...@@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wdt_ops = { ...@@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wdt_ops = {
static const struct watchdog_info qcom_wdt_info = { static const struct watchdog_info qcom_wdt_info = {
.options = WDIOF_KEEPALIVEPING .options = WDIOF_KEEPALIVEPING
| WDIOF_MAGICCLOSE | WDIOF_MAGICCLOSE
| WDIOF_SETTIMEOUT, | WDIOF_SETTIMEOUT
| WDIOF_CARDRESET,
.identity = KBUILD_MODNAME, .identity = KBUILD_MODNAME,
}; };
...@@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platform_device *pdev) ...@@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platform_device *pdev)
wdt->wdd.max_timeout = 0x10000000U / wdt->rate; wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
wdt->wdd.parent = &pdev->dev; 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 * If 'timeout-sec' unspecified in devicetree, assume a 30 second
* default, unless the max timeout is less than 30 seconds, then use * default, unless the max timeout is less than 30 seconds, then use
......
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