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path: root/drivers/firmware/psci/psci.c
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Diffstat (limited to 'drivers/firmware/psci/psci.c')
-rw-r--r--drivers/firmware/psci/psci.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index b3b6c15e7b36..2937d44b5df4 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -97,7 +97,7 @@ static inline bool psci_has_ext_power_state(void)
PSCI_1_0_FEATURES_CPU_SUSPEND_PF_MASK;
}
-static inline bool psci_has_osi_support(void)
+bool psci_has_osi_support(void)
{
return psci_cpu_suspend_feature & PSCI_1_0_OS_INITIATED;
}
@@ -162,6 +162,15 @@ static u32 psci_get_version(void)
return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
}
+int psci_set_osi_mode(void)
+{
+ int err;
+
+ err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE,
+ PSCI_1_0_SUSPEND_MODE_OSI, 0, 0);
+ return psci_to_linux_errno(err);
+}
+
static int psci_cpu_suspend(u32 state, unsigned long entry_point)
{
int err;
@@ -544,9 +553,14 @@ static int __init psci_1_0_init(struct device_node *np)
if (err)
return err;
- if (psci_has_osi_support())
+ if (psci_has_osi_support()) {
pr_info("OSI mode supported.\n");
+ /* Default to PC mode. */
+ invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE,
+ PSCI_1_0_SUSPEND_MODE_PC, 0, 0);
+ }
+
return 0;
}