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-rw-r--r--include/linux/clockchips.h37
1 files changed, 34 insertions, 3 deletions
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index 96c280b2c263..597a1e836f22 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -37,12 +37,15 @@ enum clock_event_mode {
* reached from DETACHED or SHUTDOWN.
* ONESHOT: Device is programmed to generate event only once. Can be reached
* from DETACHED or SHUTDOWN.
+ * ONESHOT_STOPPED: Device was programmed in ONESHOT mode and is temporarily
+ * stopped.
*/
enum clock_event_state {
CLOCK_EVT_STATE_DETACHED,
CLOCK_EVT_STATE_SHUTDOWN,
CLOCK_EVT_STATE_PERIODIC,
CLOCK_EVT_STATE_ONESHOT,
+ CLOCK_EVT_STATE_ONESHOT_STOPPED,
};
/*
@@ -84,12 +87,13 @@ enum clock_event_state {
* @mult: nanosecond to cycles multiplier
* @shift: nanoseconds to cycles divisor (power of two)
* @mode: operating mode, relevant only to ->set_mode(), OBSOLETE
- * @state: current state of the device, assigned by the core code
+ * @state_use_accessors:current state of the device, assigned by the core code
* @features: features
* @retries: number of forced programming retries
* @set_mode: legacy set mode function, only for modes <= CLOCK_EVT_MODE_RESUME.
* @set_state_periodic: switch state to periodic, if !set_mode
* @set_state_oneshot: switch state to oneshot, if !set_mode
+ * @set_state_oneshot_stopped: switch state to oneshot_stopped, if !set_mode
* @set_state_shutdown: switch state to shutdown, if !set_mode
* @tick_resume: resume clkevt device, if !set_mode
* @broadcast: function to broadcast events
@@ -113,7 +117,7 @@ struct clock_event_device {
u32 mult;
u32 shift;
enum clock_event_mode mode;
- enum clock_event_state state;
+ enum clock_event_state state_use_accessors;
unsigned int features;
unsigned long retries;
@@ -121,11 +125,12 @@ struct clock_event_device {
* State transition callback(s): Only one of the two groups should be
* defined:
* - set_mode(), only for modes <= CLOCK_EVT_MODE_RESUME.
- * - set_state_{shutdown|periodic|oneshot}(), tick_resume().
+ * - set_state_{shutdown|periodic|oneshot|oneshot_stopped}(), tick_resume().
*/
void (*set_mode)(enum clock_event_mode mode, struct clock_event_device *);
int (*set_state_periodic)(struct clock_event_device *);
int (*set_state_oneshot)(struct clock_event_device *);
+ int (*set_state_oneshot_stopped)(struct clock_event_device *);
int (*set_state_shutdown)(struct clock_event_device *);
int (*tick_resume)(struct clock_event_device *);
@@ -144,6 +149,32 @@ struct clock_event_device {
struct module *owner;
} ____cacheline_aligned;
+/* Helpers to verify state of a clockevent device */
+static inline bool clockevent_state_detached(struct clock_event_device *dev)
+{
+ return dev->state_use_accessors == CLOCK_EVT_STATE_DETACHED;
+}
+
+static inline bool clockevent_state_shutdown(struct clock_event_device *dev)
+{
+ return dev->state_use_accessors == CLOCK_EVT_STATE_SHUTDOWN;
+}
+
+static inline bool clockevent_state_periodic(struct clock_event_device *dev)
+{
+ return dev->state_use_accessors == CLOCK_EVT_STATE_PERIODIC;
+}
+
+static inline bool clockevent_state_oneshot(struct clock_event_device *dev)
+{
+ return dev->state_use_accessors == CLOCK_EVT_STATE_ONESHOT;
+}
+
+static inline bool clockevent_state_oneshot_stopped(struct clock_event_device *dev)
+{
+ return dev->state_use_accessors == CLOCK_EVT_STATE_ONESHOT_STOPPED;
+}
+
/*
* Calculate a multiplication factor for scaled math, which is used to convert
* nanoseconds based values to clock ticks: