On 20-01-07 13:09, Mark Brown wrote: > On Tue, Jan 07, 2020 at 09:36:54AM +0100, Marco Felsch wrote: > > On 19-12-17 12:58, Mark Brown wrote: > > > > This doesn't say anything about how the GPIO input is expected to be > > > controlled, for voltage setting any runtime control would need to be > > > done by the driver and it sounds like that's all that can be controlled. > > > The way this reads I'd expect one use of this to be for fast voltage > > > setting for example (you could even combine that with suspend sequencing > > > using the internal sequencer if you mux back to the sequencer during > > > suspend). > > > The input signal is routed trough the da9062 gpio block to the > > regualtors. You can't set any voltage value using a gpio instead you > > decide which voltage setting is applied. The voltage values for > > runtime/suspend comes from the dt-data. No it's not just a fast > > switching option imagine the system suspend case where the cpu and soc > > voltage can be reduced to a very low value. Older soc's like the imx6 > > signaling this state by a hard wired gpio line because the soc and > > cpu cores don't work properly on such low voltage values. This is > > my use case and I can't use the sequencer. > > My point is that I can't tell any of this from the description. Therefore I want to discuss the dt-binding documentation with you and the others to get this done. Is the above description better to understand the dt-binding? Regards, Marco
