Re: [PATCH/RFC 1/2] PM / wakeup: Add callback for wake-up change notification

[Sergei Shtylyov]

On 03/14/2018 02:26 PM, Geert Uytterhoeven wrote:

> Add a callback to inform a device that his wake-up setting has been

   s/his/its/.

> 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, 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.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
[...]

MBR, Sergei