On Wed, Aug 17, 2011 at 3:04 PM, Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > The device driver will know what power supplies and other signals the > device has, and it will know how and when to use them. (...) And I guess there is nothing in the spec claiming that all devices be powered-on when you boot? In that case the devices living on that bus will not respond to discovery messages until they are powered on, will they? Or is there some ingenious self-powered shift register logic doing these responses? Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html