target/linux/ipq806x/patches-4.4/010-6-watchdog-qcom-configure-BARK-time-in-addition-to-BITE-time.patch

   1 From 10073a205df269abcbd9c3fbc690a813827107ef Mon Sep 17 00:00:00 2001
   2 From: Matthew McClintock <mmcclint@codeaurora.org>
   3 Date: Tue, 28 Jun 2016 11:35:21 -0700
   4 Subject: watchdog: qcom: configure BARK time in addition to BITE time
   5
   6 For certain parts and some versions of TZ, TZ will reset the chip
   7 when a BARK is triggered even though it was not configured here. So
   8 by default let's configure this BARK time as well.
   9
  10 Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
  11 Reviewed-by: Guenter Roeck <linux@roeck-us.net>
  12 Signed-off-by: Thomas Pedersen <twp@codeaurora.org>
  13 Signed-off-by: Guenter Roeck <linux@roeck-us.net>
  14 Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
  15 ---
  16  drivers/watchdog/qcom-wdt.c | 5 +++++
  17  1 file changed, 5 insertions(+)
  18
  19 --- a/drivers/watchdog/qcom-wdt.c
  20 +++ b/drivers/watchdog/qcom-wdt.c
  21 @@ -24,6 +24,7 @@ enum wdt_reg {
  22         WDT_RST,
  23         WDT_EN,
  24         WDT_STS,
  25 +       WDT_BARK_TIME,
  26         WDT_BITE_TIME,
  27  };
  28
  29 @@ -31,6 +32,7 @@ static const u32 reg_offset_data_apcs_tm
  30         [WDT_RST] = 0x38,
  31         [WDT_EN] = 0x40,
  32         [WDT_STS] = 0x44,
  33 +       [WDT_BARK_TIME] = 0x4C,
  34         [WDT_BITE_TIME] = 0x5C,
  35  };
  36
  37 @@ -38,6 +40,7 @@ static const u32 reg_offset_data_kpss[]
  38         [WDT_RST] = 0x4,
  39         [WDT_EN] = 0x8,
  40         [WDT_STS] = 0xC,
  41 +       [WDT_BARK_TIME] = 0x10,
  42         [WDT_BITE_TIME] = 0x14,
  43  };
  44
  45 @@ -66,6 +69,7 @@ static int qcom_wdt_start(struct watchdo
  46
  47         writel(0, wdt_addr(wdt, WDT_EN));
  48         writel(1, wdt_addr(wdt, WDT_RST));
  49 +       writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BARK_TIME));
  50         writel(wdd->timeout * wdt->rate, wdt_addr(wdt, WDT_BITE_TIME));
  51         writel(1, wdt_addr(wdt, WDT_EN));
  52         return 0;
  53 @@ -108,6 +112,7 @@ static int qcom_wdt_restart(struct watch
  54
  55         writel(0, wdt_addr(wdt, WDT_EN));
  56         writel(1, wdt_addr(wdt, WDT_RST));
  57 +       writel(timeout, wdt_addr(wdt, WDT_BARK_TIME));
  58         writel(timeout, wdt_addr(wdt, WDT_BITE_TIME));
  59         writel(1, wdt_addr(wdt, WDT_EN));
  60