Re: [U-Boot] Support for reading GPIO's in boot scripts?

Dear Charles Krinke,

In message AANLkTind=t82J4w1N+sp8vnFwiF2nXQsgrNFsgfKXjvN@mail.gmail.com you wrote:

Let me add my $.02. I have a request to be able to boot a USB drive. So, reading a GPIO pin and making a decision in a script is a desirable thing. Certainly a 'MD 0x12345678' can read a pin but then making a decision in an environment string chain would help. Can we do this?

Sure we can do this. It's as trivial as for example

setexpr tmpvar *12345678.l "&" 00010000 if itest ${tmpvar} != 0; then do something ; fi

Best regards,

Wolfgang Denk