This patch series implements the idea discussed in this thread:

https://www.spinics.net/lists/arm-kernel/msg590068.html

The last patch is relative to the pending submission of the Broadcom STB
S2/S3/S5 suspend/resume code that can be found below, and is provided
as an example of how this can be useful.

https://lkml.org/lkml/2017/6/16/737

Florian Fainelli (2):
  PM / suspend: Add platform_suspend_target_state()
  soc: bcm: brcmstb: PM: Implement target_state callback

 drivers/soc/bcm/brcmstb/pm/pm-arm.c | 15 +++++++++++++++
 include/linux/suspend.h             | 12 ++++++++++++
 kernel/power/suspend.c              | 15 +++++++++++++++
 3 files changed, 42 insertions(+)

-- 
2.9.3