target/linux/ipq806x/patches-4.4/710-watchdog-qcom-set-WDT_BARK_TIME-register-offset-to-o.patch

   1 From abc9f55079169806bcc31f29ec27f7df11c6184c Mon Sep 17 00:00:00 2001
   2 From: Ram Chandra Jangir <rjangi@codeaurora.org>
   3 Date: Thu, 4 Feb 2016 12:41:56 +0530
   4 Subject: [PATCH 2/2] watchdog: qcom: set WDT_BARK_TIME register offset to one
   5  second less of bite time
   6
   7 Currently WDT_BARK_TIME register offset is not configured with bark
   8 timeout during wdt_start,and it is taking bark timeout's default value.
   9 For some versions of TZ (secure mode) will consider a BARK the same
  10 as BITE and reset the board.
  11
  12 So instead let's just configure the BARK time to be less than a second
  13 of the bite timeout so the board does not reset in this scenario
  14
  15 Change-Id: Ie09850ad7e0470ed721e6924911ca2a81fd9ff8a
  16 Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>
  17 ---
  18  drivers/watchdog/qcom-wdt.c | 2 ++
  19  1 file changed, 2 insertions(+)
  20
  21 diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
  22 index 773dcfa..002274a 100644
  23 --- a/drivers/watchdog/qcom-wdt.c
  24 +++ b/drivers/watchdog/qcom-wdt.c
  25 @@ -22,6 +22,7 @@
  26
  27  #define WDT_RST                0x38
  28  #define WDT_EN         0x40
  29 +#define WDT_BARK_TIME  0x4C
  30  #define WDT_BITE_TIME  0x5C
  31
  32  struct qcom_wdt {
  33 @@ -44,6 +45,7 @@ static int qcom_wdt_start(struct watchdog_device *wdd)
  34
  35         writel(0, wdt->base + WDT_EN);
  36         writel(1, wdt->base + WDT_RST);
  37 +       writel((wdd->timeout - 1) * wdt->rate, wdt->base + WDT_BARK_TIME);
  38         writel(wdd->timeout * wdt->rate, wdt->base + WDT_BITE_TIME);
  39         writel(1, wdt->base + WDT_EN);
  40         return 0;
  41 --
  42 2.7.2
  43