Re: [PATCH] watchdog: qcom: Report reboot reason

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On 05/03/2016 06:36 PM, Grant Grundler wrote:
Ping? Did this change get accepted?


Hi Grant,

Should be. It is in my watchdog-next branch. I plan to send
a pull request to Wim early next week.

Guenter

cheers,
grant

On Tue, Apr 5, 2016 at 12:07 PM, Grant Grundler <grundler@xxxxxxxxxxxx> wrote:
On Mon, Apr 4, 2016 at 5:37 PM, Guenter Roeck <groeck@xxxxxxxxxxxx> wrote:
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>

Reviewed-by: Grant Grundler <grundler@xxxxxxxxxxxx>
Tested-by: Grant Grundler <grundler@xxxxxxxxxxxx>

Thanks Guenter! :)

FTR, this landed in the chromeos-3.14 (and chromeos-3.18 shortly)
branches and will be included in a future update for TP-Link Onhub
devices.

cheers,
grant

---
  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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