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@@ -16,6 +16,12 @@ DECLARE_GLOBAL_DATA_PTR;
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#define WATCHDOG_TIMEOUT_SECS (CONFIG_WATCHDOG_TIMEOUT_MSECS / 1000)
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+/*
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+ * Reset every 1000ms, or however often is required as indicated by a
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+ * hw_margin_ms property.
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+ */
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+static ulong reset_period = 1000;
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+
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int initr_watchdog(void)
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{
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u32 timeout = WATCHDOG_TIMEOUT_SECS;
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@@ -37,6 +43,9 @@ int initr_watchdog(void)
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if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)) {
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timeout = dev_read_u32_default(gd->watchdog_dev, "timeout-sec",
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WATCHDOG_TIMEOUT_SECS);
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+ reset_period = dev_read_u32_default(gd->watchdog_dev,
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+ "hw_margin_ms",
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+ 4 * reset_period) / 4;
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}
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wdt_start(gd->watchdog_dev, timeout * 1000, 0);
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@@ -118,7 +127,7 @@ void watchdog_reset(void)
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/* Do not reset the watchdog too often */
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now = get_timer(0);
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if (time_after(now, next_reset)) {
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- next_reset = now + 1000; /* reset every 1000ms */
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+ next_reset = now + reset_period;
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wdt_reset(gd->watchdog_dev);
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}
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}
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