How to blink LED while board booting

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Published in 2016-11-9 16:31:07 | Show all floors |Read mode

Does anyone know how to blink LED whlie booting with uboot.I could tunr on the LED light with inserting gpio_sunxi.ko module.

But I need blink the LED before LINUX file system.

So does anyone know how to implement it?

Thanks for your help.

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