On Tue, May 7, 2024 at 4:48 PM Johan Hovold <johan+linaro@xxxxxxxxxx> wrote: > When the power supply is shared with other peripherals the reset line > can be wired in such a way that it can remain deasserted regardless of > whether the supply is on or not. > > This is important as it can be used to avoid holding the controller in > reset for extended periods of time when it remains powered, something > which can lead to increased power consumption. Leaving reset deasserted > also avoids leaking current through the reset circuitry pull-up > resistors. > > Add a new 'no-reset-on-power-off' devicetree property which can be used > by the OS to determine when reset needs to be asserted on power down. > > Note that this property can also be used when the supply cannot be > turned off by the OS at all. > > Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx> Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Yours, Linus Walleij
