[RFC,6/7] cpuidle-arm: Add arm64 wake helper for cpu_poke op
diff mbox series

Message ID 1553692845-20983-7-git-send-email-abel.vesa@nxp.com
State RFC
Headers show
Series
  • cpuidle: Add poking mechanism to support non-IPI wakeup
Related show

Commit Message

Abel Vesa March 27, 2019, 1:21 p.m. UTC
When the arm_poke_idle_state gets called, the poking
cpu_ops of the current core gets called, passing on the
the index of the core to be poked.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
---
 arch/arm64/include/asm/cpuidle.h | 6 ++++++
 arch/arm64/kernel/cpuidle.c      | 8 ++++++++
 drivers/cpuidle/cpuidle-arm.c    | 2 +-
 3 files changed, 15 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/arch/arm64/include/asm/cpuidle.h b/arch/arm64/include/asm/cpuidle.h
index 3c5ddb4..e637d4d 100644
--- a/arch/arm64/include/asm/cpuidle.h
+++ b/arch/arm64/include/asm/cpuidle.h
@@ -7,6 +7,7 @@ 
 #ifdef CONFIG_CPU_IDLE
 extern int arm_cpuidle_init(unsigned int cpu);
 extern int arm_cpuidle_suspend(int index);
+extern int arm_cpuidle_wake(int index);
 #else
 static inline int arm_cpuidle_init(unsigned int cpu)
 {
@@ -17,5 +18,10 @@  static inline int arm_cpuidle_suspend(int index)
 {
 	return -EOPNOTSUPP;
 }
+
+static inline int arm_cpuidle_wake(int index)
+{
+	return -EOPNOTSUPP;
+}
 #endif
 #endif
diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c
index f2d1381..af00955 100644
--- a/arch/arm64/kernel/cpuidle.c
+++ b/arch/arm64/kernel/cpuidle.c
@@ -43,6 +43,14 @@  int arm_cpuidle_suspend(int index)
 	return cpu_ops[cpu]->cpu_suspend(index);
 }
 
+int arm_cpuidle_wake(int index)
+{
+	int cpu = smp_processor_id();
+
+	return cpu_ops[cpu]->cpu_poke(index);
+}
+
+
 #ifdef CONFIG_ACPI
 
 #include <acpi/processor.h>
diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c
index 76ee7ac..d5d3eef 100644
--- a/drivers/cpuidle/cpuidle-arm.c
+++ b/drivers/cpuidle/cpuidle-arm.c
@@ -48,7 +48,7 @@  static int arm_enter_idle_state(struct cpuidle_device *dev,
 static int arm_poke_idle_state(struct cpuidle_device *dev,
 				struct cpuidle_driver *drv, int cpu)
 {
-	return 0;
+	return arm_cpuidle_wake(cpu);
 }
 
 static struct cpuidle_driver arm_idle_driver __initdata = {