First, sorry for the huge delay. On Wednesday, March 14, 2018 12:26:24 PM CEST Geert Uytterhoeven wrote: > Add a callback to inform a device that his wake-up setting has been > changed. This allows a device to synchronize device configuration with > an external user action. > > E.g. on systems using a Rohm BD9571MWV PMIC and a toggle accessory power > switch, the system suspend procedure is: > 1. Configure PMIC for DDR backup mode, which changes the role of the > accessory power switch from a power to a wake-up switch, > 2. Switch accessory power switch off, to prepare for system suspend, > 3. Suspend system. > > Hence step 1 cannot be done in the PMIC's suspend callback, I don't quite understand this, so can you please explain? What can't it be done from ->prepare() or even from a suspend notifier? > but it can be done in the new callback, in response to the user writing "enabled" > to the PMIC's wakeup virtual file in sysfs.
