46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
From b6ef36d2c1e391adc1fe1b2dd2a0f887a9f3052b Mon Sep 17 00:00:00 2001
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From: Guenter Roeck <groeck@chromium.org>
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Date: Mon, 4 Apr 2016 17:37:46 -0700
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Subject: watchdog: qcom: Report reboot reason
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The Qualcom watchdog timer block reports if the system was reset by the
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watchdog. Pass the information to user space.
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Reviewed-by: Grant Grundler <grundler@chromium.org>
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Tested-by: Grant Grundler <grundler@chromium.org>
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Signed-off-by: Guenter Roeck <groeck@chromium.org>
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Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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---
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drivers/watchdog/qcom-wdt.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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--- a/drivers/watchdog/qcom-wdt.c
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+++ b/drivers/watchdog/qcom-wdt.c
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@@ -21,6 +21,7 @@
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#define WDT_RST 0x38
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#define WDT_EN 0x40
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+#define WDT_STS 0x44
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#define WDT_BITE_TIME 0x5C
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struct qcom_wdt {
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@@ -108,7 +109,8 @@ static const struct watchdog_ops qcom_wd
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static const struct watchdog_info qcom_wdt_info = {
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.options = WDIOF_KEEPALIVEPING
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| WDIOF_MAGICCLOSE
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- | WDIOF_SETTIMEOUT,
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+ | WDIOF_SETTIMEOUT
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+ | WDIOF_CARDRESET,
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.identity = KBUILD_MODNAME,
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};
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@@ -171,6 +173,9 @@ static int qcom_wdt_probe(struct platfor
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wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
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wdt->wdd.parent = &pdev->dev;
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+ if (readl(wdt->base + WDT_STS) & 1)
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+ wdt->wdd.bootstatus = WDIOF_CARDRESET;
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+
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/*
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* If 'timeout-sec' unspecified in devicetree, assume a 30 second
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* default, unless the max timeout is less than 30 seconds, then use
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