From 555e9174ef06b7bfc54a3127a8d8fc47d55d04f4 Mon Sep 17 00:00:00 2001 From: Philip Radford Date: Mon, 30 Jun 2025 10:55:41 +0000 Subject: [PATCH] firmware: arm_scmi: Add support for debug counter decrement 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 Signed-off-by: Philip Radford Message-Id: <20250630105544.531723-2-philip.radford@arm.com> Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/common.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index dab758c5fdea3..c6495c4a0e8a4 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -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, -- 2.47.2