On Tue, Sep 10, 2013 at 01:39:59PM +0800, Wei Ni wrote: > I think the device need time to wait stable after power on, but it's > difficult to get an exact delay value, and this delay may also relate > with platform design, so how about to add a optional property in the DT > node, such as "power-on-delay-ms" ? This is something you should *really* be able to get from the datasheet for the part - this sort of stuff has to be documented for hardware to be used robustly. It seems entirely possible that you are working around an issue with the regulator driver you are using not correctly providing its ramp time here.
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