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How do I power ON the USB port when the board is powered ON on AMD Geode LX(cs5535)?

Question asked by rams8055 on Nov 17, 2016

Hi there,

 

  I have a PC Engines Alix 3d2 board powered by AMD Geode LX (cs5535) processor. There are two USB ports where VCC is switched. Unless the driver gets loaded this ports doesn't get power. I want to make this ports always powered ON. How do I do this? Is there is a specific register/GPIO that I can make it HIGH/LOW to enable?

 

In the data sheet of AMD cs5535 http://support.amd.com/TechDocs/31506_cs5535_databook.pdf , I found a register where I can enable/disable Power switching mode.

 

I did this in my code:

 

prev = inl(0x52100048);

outl(0x52100048, prev | (1 << 9));

 

which did not work. Any help would be appreciated.

 

Thanks,

Ramana Reddy

 

Message was edited by: Ramana Reddy

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