#define PSCI_POWER_STATE_TYPE_STANDBY 0
#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1
+enum psci_affinity_level {
+ PSCI_AFFINITY_LEVEL_0,
+ PSCI_AFFINITY_LEVEL_1,
+ PSCI_AFFINITY_LEVEL_2,
+ PSCI_AFFINITY_LEVEL_3,
+};
+
struct psci_power_state {
u16 id;
u8 type;
{
struct psci_power_state *state = __this_cpu_read(psci_power_state);
+ /* Generic PM suspend without CPUIDLE functionality */
+ if (!state) {
+ struct psci_power_state s = {
+ .affinity_level = PSCI_AFFINITY_LEVEL_3,
+ .type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
+ };
+ return psci_ops.cpu_suspend(s, virt_to_phys(cpu_resume));
+ }
+
return psci_ops.cpu_suspend(state[index - 1],
virt_to_phys(cpu_resume));
}
static int __maybe_unused cpu_psci_cpu_suspend(unsigned long index)
{
- int ret;
struct psci_power_state *state = __this_cpu_read(psci_power_state);
- /*
- * idle state index 0 corresponds to wfi, should never be called
- * from the cpu_suspend operations
- */
- if (WARN_ON_ONCE(!index))
- return -EINVAL;
- if (state[index - 1].type == PSCI_POWER_STATE_TYPE_STANDBY)
- ret = psci_ops.cpu_suspend(state[index - 1], 0);
- else
- ret = cpu_suspend(index, psci_suspend_finisher);
+ if (state) {
+ if (WARN_ON_ONCE(!index))
+ return -EINVAL;
- return ret;
+ /*
+ * If idle state initialization is successfully done,
+ * idle state index 0 corresponds to wfi, should never be
+ * called from the cpu_suspend operations
+ */
+ if (state[index - 1].type == PSCI_POWER_STATE_TYPE_STANDBY)
+ return psci_ops.cpu_suspend(state[index - 1], 0);
+ }
+ return cpu_suspend(index, psci_suspend_finisher);
}
const struct cpu_operations cpu_psci_ops = {