target/linux/ipq806x/patches-4.4/010-4-watchdog-qcom-Report-reboot-reason.patch

   1 From b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b Mon Sep 17 00:00:00 2001
   2 From: Guenter Roeck <groeck@chromium.org>
   3 Date: Mon, 4 Apr 2016 17:37:46 -0700
   4 Subject: watchdog: qcom: Report reboot reason
   5
   6 The Qualcom watchdog timer block reports if the system was reset by the
   7 watchdog. Pass the information to user space.
   8
   9 Reviewed-by: Grant Grundler <grundler@chromium.org>
  10 Tested-by: Grant Grundler <grundler@chromium.org>
  11 Signed-off-by: Guenter Roeck <groeck@chromium.org>
  12 Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
  13 ---
  14  drivers/watchdog/qcom-wdt.c | 7 ++++++-
  15  1 file changed, 6 insertions(+), 1 deletion(-)
  16
  17 --- a/drivers/watchdog/qcom-wdt.c
  18 +++ b/drivers/watchdog/qcom-wdt.c
  19 @@ -21,6 +21,7 @@
  20
  21  #define WDT_RST                0x38
  22  #define WDT_EN         0x40
  23 +#define WDT_STS                0x44
  24  #define WDT_BITE_TIME  0x5C
  25
  26  struct qcom_wdt {
  27 @@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wd
  28  static const struct watchdog_info qcom_wdt_info = {
  29         .options        = WDIOF_KEEPALIVEPING
  30                         | WDIOF_MAGICCLOSE
  31 -                       | WDIOF_SETTIMEOUT,
  32 +                       | WDIOF_SETTIMEOUT
  33 +                       | WDIOF_CARDRESET,
  34         .identity       = KBUILD_MODNAME,
  35  };
  36
  37 @@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platfor
  38         wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
  39         wdt->wdd.parent = &pdev->dev;
  40
  41 +       if (readl(wdt->base + WDT_STS) & 1)
  42 +               wdt->wdd.bootstatus = WDIOF_CARDRESET;
  43 +
  44         /*
  45          * If 'timeout-sec' unspecified in devicetree, assume a 30 second
  46          * default, unless the max timeout is less than 30 seconds, then use