@@ -67,12 +67,16 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
/*
* Allow power off when OSI has been successfully enabled.
- * PREEMPT_RT is not yet ready to enter domain idle states.
+ * On a PREEMPT_RT based configuration the domain idle states are
+ * supported, but only during system-wide suspend.
*/
- if (use_osi && !IS_ENABLED(CONFIG_PREEMPT_RT))
+ if (use_osi) {
pd->power_off = psci_pd_power_off;
- else
+ if (IS_ENABLED(CONFIG_PREEMPT_RT))
+ pd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;
+ } else {
pd->flags |= GENPD_FLAG_ALWAYS_ON;
+ }
/* Use governor for CPU PM domains if it has some states to manage. */
pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
The domain-idle-states are currently disabled on a PREEMPT_RT based configuration for the cpuidle-psci-domain. To enable them to be used for system-wide suspend and in particular during s2idle, let's set the GENPD_FLAG_RPM_ALWAYS_ON instead of GENPD_FLAG_ALWAYS_ON for the corresponding genpd provider. In this way, the runtime PM path remains disabled in genpd for its attached devices, while powering-on/off the PM domain during system-wide suspend becomes allowed. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/cpuidle/cpuidle-psci-domain.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)