PM / Domains: Make it possible to assign names to generic PM domains

Add a name member pointer to struct generic_pm_domain and use it in
diagnostic messages regarding the domain power-off and power-on
latencies.  Update the ARM shmobile SH7372 code to assign names to
the PM domains used by it.

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

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 5a8d67d51f0e..ad6ba2e04677 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -209,8 +209,13 @@ int __pm_genpd_poweron(struct generic_pm_domain *genpd)
                         goto err;
 
                 elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
-                if (elapsed_ns > genpd->power_on_latency_ns)
+                if (elapsed_ns > genpd->power_on_latency_ns) {
                         genpd->power_on_latency_ns = elapsed_ns;
+                        if (genpd->name)
+                                pr_warning("%s: Power-on latency exceeded, "
+                                        "new value %lld ns\n", genpd->name,
+                                        elapsed_ns);
+                }
         }
 
         genpd_set_active(genpd);
@@ -428,8 +433,13 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
                 }
 
                 elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
-                if (elapsed_ns > genpd->power_off_latency_ns)
+                if (elapsed_ns > genpd->power_off_latency_ns) {
                         genpd->power_off_latency_ns = elapsed_ns;
+                        if (genpd->name)
+                                pr_warning("%s: Power-off latency exceeded, "
+                                        "new value %lld ns\n", genpd->name,
+                                        elapsed_ns);
+                }
         }
 
         genpd->status = GPD_STATE_POWER_OFF;