> > The sensor driver typically determines this via the presence (or absence) > > of regulator supply entries in the Device Tree. If a supply is not defined, > > it's assumed to be always-on (e.g., provided by the board via fixed rails). > > No, this is broken. The driver should unconditionally request whatever > supplies the device needs. Yes, that’s clear from Laurent’s explanation: "A sensor always needs supplies, regardless of whether or not they're always on. Drivers should get the supplies with regulator_get() (or possibly the bulk API)" Thanks, Mark, for the clarification. Best Regards, Tarang