diff options
| -rw-r--r-- | drivers/cpuidle/cpuidle-psci.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c index ee35ac816321..40f378c1dc9f 100644 --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -438,10 +438,29 @@ static struct faux_device_ops psci_cpuidle_ops = { .probe = psci_cpuidle_probe, }; +static bool __init dt_idle_state_present(void) +{ + struct device_node *cpu_node __free(device_node); + struct device_node *state_node __free(device_node); + + cpu_node = of_cpu_device_node_get(cpumask_first(cpu_possible_mask)); + if (!cpu_node) + return false; + + state_node = of_get_cpu_state_node(cpu_node, 0); + if (!state_node) + return false; + + return !!of_match_node(psci_idle_state_match, state_node); +} + static int __init psci_idle_init(void) { struct faux_device *fdev; + if (!dt_idle_state_present()) + return 0; + fdev = faux_device_create("psci-cpuidle", NULL, &psci_cpuidle_ops); if (!fdev) { pr_err("Failed to create psci-cpuidle device\n"); |