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And the LED on below 7045 is on as well...

But why was it needed to set MIO7 direction to out, if this pin is Output only? Well it is not usable as input, but Linux driver system does not know that it is output only and it listed with direction input initially.

Zedboard OOB Design

The SD Card images delivered with zedboard (and available as OOB SD Card images) include a kernel 3.09 with GPIO-LEDS enabled on MIO7 with default trigger set to MMC (SD Card) activity. Writing none to LED trigger would allow direct programmatic control over MIO7 LED on zedboard (labelled LD9!). 

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