On Mon, Aug 22, 2016 at 07:52:05PM +0200, Rask Ingemann Lambertsen wrote: > On Mon, Aug 22, 2016 at 05:29:07PM +0100, Mark Brown wrote: > > This seems like you have buggy constraints, constraints which allow > > voltages that can't physically be satisfied don't make obvious sense. > No, it's for cases like this (see the cubietruck4 or a80-optimus dts > patches): > reg_bldo4: bldo4 { > regulator-min-microvolt = <1080000>; > regulator-max-microvolt = <1320000>; > regulator-name = "vcc12-hsic"; > }; > The regulator can do 1100000 uV, 1200000 uV and 1300000 uV, all of which > are within the constraints, so obviously the constraints can be satisfied, > yet the regulator core fails do so with a message like this: Sure, but the constraints also say that you can do 1.32V which the system is not physically capable of delivering. That's not a good sign for the constraints, it suggests that at least the capabilities of the regulator have not been taken into consideration when setting up the constraints.
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