Store a pointer in the cpuidle_state structure to the Device Tree node
from which that state originated, if such a node exists.
This will allow plaform-specific components to extract extra idle state
information without duplicating the logic that finds the idle state
nodes.
---
drivers/cpuidle/dt_idle_states.c | 3 +++
include/linux/cpuidle.h | 18 ++++++++++--------
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/cpuidle/dt_idle_states.c b/drivers/cpuidle/dt_idle_states.c
index a5c111b..61a70ec 100644
--- a/drivers/cpuidle/dt_idle_states.c
+++ b/drivers/cpuidle/dt_idle_states.c
@@ -88,6 +88,9 @@ static int init_state_node(struct cpuidle_state *idle_state,
*/
strncpy(idle_state->name, state_node->name, CPUIDLE_NAME_LEN - 1);
strncpy(idle_state->desc, desc, CPUIDLE_DESC_LEN - 1);
+
+ idle_state->of_node = state_node;
+
return 0;
}
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 8435577..d4ea1e4 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -14,6 +14,7 @@
#include <linux/percpu.h>
#include <linux/list.h>
#include <linux/hrtimer.h>
+#include <linux/of.h>
#define CPUIDLE_STATE_MAX 10
#define CPUIDLE_NAME_LEN 16
@@ -36,14 +37,15 @@ struct cpuidle_state_usage {
};
struct cpuidle_state {
- char name[CPUIDLE_NAME_LEN];
- char desc[CPUIDLE_DESC_LEN];
-
- unsigned int flags;
- unsigned int exit_latency; /* in US */
- int power_usage; /* in mW */
- unsigned int target_residency; /* in US */
- bool disabled; /* disabled on all CPUs */
+ char name[CPUIDLE_NAME_LEN];
+ char desc[CPUIDLE_DESC_LEN];
+
+ unsigned int flags;
+ unsigned int exit_latency; /* in US */
+ int power_usage; /* in mW */
+ unsigned int target_residency; /* in US */
+ bool disabled; /* disabled on all CPUs */
+ struct device_node *of_node;
int (*enter) (struct cpuidle_device *dev,
struct cpuidle_driver *drv,
--
2.9.3
--
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