On 20-01-07 13:09, Mark Brown wrote:

On Tue, Jan 07, 2020 at 09:36:54AM +0100, Marco Felsch wrote:

quoted

On 19-12-17 12:58, Mark Brown wrote:

quoted

quoted

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).

quoted

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