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firmware: arm_scmi: Add support for debug counter decrement

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Introduce a new `scmi_dec_count` helper to complement the existing
`scmi_inc_count`, allowing controlled decrement of SCMI debug counters.

This provides symmetry in debug counter management and enables
accurate tracking of counters that may both increase and decrease,
such as those used for in-flight message tracking.

Only active when CONFIG_ARM_SCMI_DEBUG_COUNTERS is enabled.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Philip Radford <philip.radford@arm.com>
Message-Id: <20250630105544.531723-2-philip.radford@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Philip Radford
2025-06-30 10:55:41 +00:00
committed by Sudeep Holla
parent ad28fc31dd
commit 555e9174ef
1 changed files with 6 additions and 0 deletions
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6
drivers/firmware/arm_scmi/common.h
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@@ -314,6 +314,12 @@ static inline void scmi_inc_count(atomic_t *arr, int stat)
atomic_inc(&arr[stat]);
}
static inline void scmi_dec_count(atomic_t *arr, int stat)
{
if (IS_ENABLED(CONFIG_ARM_SCMI_DEBUG_COUNTERS))
atomic_dec(&arr[stat]);
}
enum scmi_bad_msg {
MSG_UNEXPECTED = -1,
MSG_INVALID = -2,