PM / Domains: Add device stop governor function (v4)

Add a function deciding whether or not devices should be stopped in
pm_genpd_runtime_suspend() depending on their PM QoS constraints
and stop/start timing values.  Make it possible to add information
used by this function to device objects.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c
index 6777bb1be059..adf1765e69c6 100644
--- a/arch/arm/mach-shmobile/pm-sh7372.c
+++ b/arch/arm/mach-shmobile/pm-sh7372.c
@@ -169,6 +169,7 @@ static bool sh7372_power_down_forbidden(struct dev_pm_domain *domain)
 
 struct dev_power_governor sh7372_always_on_gov = {
         .power_down_ok = sh7372_power_down_forbidden,
+        .stop_ok = default_stop_ok,
 };
 
 static int sh7372_stop_dev(struct device *dev)
@@ -203,8 +204,9 @@ static int sh7372_start_dev(struct device *dev)
 void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd)
 {
         struct generic_pm_domain *genpd = &sh7372_pd->genpd;
+        struct dev_power_governor *gov = sh7372_pd->gov;
 
-        pm_genpd_init(genpd, sh7372_pd->gov, false);
+        pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
         genpd->dev_ops.stop = sh7372_stop_dev;
         genpd->dev_ops.start = sh7372_start_dev;
         genpd->dev_ops.active_wakeup = pd_active_wakeup;