[PATCH 3/4] powerpc: pm: add EPU FSM configuration for deep sleep
scottwood at freescale.com
Tue Aug 4 07:22:51 AEST 2015
On Mon, 2015-08-03 at 20:01 +0800, Chenhui Zhao wrote:
> On Sat, Aug 1, 2015 at 8:41 AM, Scott Wood <scottwood at freescale.com>
> > On Fri, 2015-07-31 at 20:53 +0800, Chenhui Zhao wrote:
> > > In the last stage of deep sleep, software will trigger a Finite
> > > State Machine (FSM) to control the hardware precedure, such as
> > > board isolation, killing PLLs, removing power, and so on.
> > >
> > > When the system is waked up by an interrupt, the FSM controls the
> > > hardware to complete the early resume precedure.
> > >
> > > This patch configure the EPU FSM preparing for deep sleep.
> > >
> > > Signed-off-by: Chenhui Zhao <chenhui.zhao at freescale.com>
> > > ---
> > > arch/powerpc/platforms/85xx/Makefile | 2 +-
> > > arch/powerpc/platforms/85xx/sleep_fsm.c | 256
> > > ++++++++++++++++++++++++++++++++
> > > arch/powerpc/platforms/85xx/sleep_fsm.h | 104 +++++++++++++
> > > 3 files changed, 361 insertions(+), 1 deletion(-)
> > > create mode 100644 arch/powerpc/platforms/85xx/sleep_fsm.c
> > > create mode 100644 arch/powerpc/platforms/85xx/sleep_fsm.h
> > When I asked why this was in drivers/platform, you said it was to
> > share
> > with LS1, and that the values used were the same -- so why did you
> > move it to
> > arch/powerpc?
> There are some changes. LS1 will use PSCI (Power State Coordination
> Interface) to implement deep sleep. So these code just used by PowerPC.
Then remove the comment about the values being usable on ls1021.
More information about the Linuxppc-dev