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hw/ptimer: Add "continuous trigger" policy

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Currently, periodic timer that has load = delta = 0 performs trigger
on timer reload and stops, printing a "period zero" error message.
Introduce new policy that makes periodic timer to continuously trigger
with a period interval in case of load = 0.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Message-id: 632b23dd11055d9bd5e338d66b38fac0bd51462e.1475421224.git.digetx@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Dmitry Osipenko 2016-10-24 16:26:51 +01:00 • committed by Peter Maydell
parent 293130aa91
commit ef0a9984aa
2 changed files with 31 additions and 3 deletions
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4
include/hw/ptimer.h
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@ -39,6 +39,10 @@
* around. */
#define PTIMER_POLICY_WRAP_AFTER_ONE_PERIOD (1 << 0)
/* Running periodic timer that has counter = limit = 0 would continuously
* re-trigger every period. */
#define PTIMER_POLICY_CONTINUOUS_TRIGGER (1 << 1)
/* ptimer.c */
typedef struct ptimer_state ptimer_state;
typedef void (*ptimer_cb)(void *opaque);