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| − | __TOC__
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| − | = Starting Watchdog Timer =
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| − | '''Preparation:''' <br>Remember to (" setenv wdt_timeout <seconds> ") before testing if you want board to reboot sooner. Otherwise, it will reboot after 1min due to the setting in the Device Tree.
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| − | '''Testing Phase:''' <br> '''Case 1:''' (which user replaces the wrong kernel Image or wrong dtb)
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| − | In this case, we are going to use 1 random kernel Image, and 1 device tree ( .dtb ) for our board.
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| − | For example: R-car M3 kernel Image + r8a774e1-hihope-rzg2h-ex.dtb.
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| − | Expected result: Board will stop at (" Starting kernel ..... ") due to the wrong kernel Image file. Board will reboot after the specified time which is set by user.
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| − | '''Case 2:''' (when loading a driver, kernel panic occurs because of loading driver fail and board stops booting)
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| − | In this case, we will add a panic() function into one function of a driver such as probe() to create kernel panic, but make sure that you have included kernel.h to use this function.
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| − | For example: In the GPIO driver
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| − | <pre>
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| − | #include <linux/kernel.h>
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| − | static int gpio_rcar_probe(struct platform_device *pdev)
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| − | {
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| − | struct gpio_rcar_priv *p;
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| − | struct resource *io, *irq;
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| − | struct gpio_chip *gpio_chip;
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| − | .......
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| − | panic("GPIO driver, Kernel panic\n");
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| − | .......
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| − | }
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| − | </pre>
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| − | Expected result: When loading GPIO driver, kernel panic occurs and board stops booting. Board will reboot after the specified time which is set by user.
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