From 20ce37ffbafcd76775c7011fea4d017de4669d0a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonny=20Sv=C3=A4rd?= <jonny.svaerd@arm.com>
Date: Fri, 17 Dec 2021 17:00:57 +0100
Subject: Add func to get nbr of PMU event counters

Small bugfix to a print in driver

Change-Id: I277a441a9f65c647c338b92af5a908176929102c
---
 include/pmu_ethosu.h | 6 ++++++
 src/ethosu_device.h  | 1 +
 src/ethosu_driver.c  | 2 +-
 src/ethosu_pmu.c     | 5 +++++
 4 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/pmu_ethosu.h b/include/pmu_ethosu.h
index 0c1475d..1a9bfd8 100644
--- a/include/pmu_ethosu.h
+++ b/include/pmu_ethosu.h
@@ -153,6 +153,12 @@ void ETHOSU_PMU_Disable(struct ethosu_driver *drv);
  */
 void ETHOSU_PMU_Set_EVTYPER(struct ethosu_driver *drv, uint32_t num, enum ethosu_pmu_event_type type);
 
+/**
+ * \brief   Get number of PMU event counters
+ * \return                Number of event counters
+ */
+uint32_t ETHOSU_PMU_Get_NumEventCounters(void);
+
 /**
  * \brief   Get event to count for PMU eventer counter
  * \param [in]    num     Event counter (0-ETHOSU_PMU_NCOUNTERS) to configure
diff --git a/src/ethosu_device.h b/src/ethosu_device.h
index 2f41d5c..cc9ea8b 100644
--- a/src/ethosu_device.h
+++ b/src/ethosu_device.h
@@ -35,6 +35,7 @@ extern "C" {
  * Defines
  ******************************************************************************/
 
+// NOTE: Deprecated
 #ifndef ETHOSU_PMU_NCOUNTERS
 #define ETHOSU_PMU_NCOUNTERS 4
 #endif
diff --git a/src/ethosu_driver.c b/src/ethosu_driver.c
index 522f3e8..fedb2a1 100644
--- a/src/ethosu_driver.c
+++ b/src/ethosu_driver.c
@@ -285,7 +285,7 @@ static struct ethosu_driver *ethosu_find_and_reserve_driver(void)
         drv = drv->next;
     }
 
-    LOG_DEBUG("No NPU driver handle available.", drv);
+    LOG_WARN("No NPU driver handle available.");
 
     return NULL;
 }
diff --git a/src/ethosu_pmu.c b/src/ethosu_pmu.c
index 647f3b0..e11636a 100644
--- a/src/ethosu_pmu.c
+++ b/src/ethosu_pmu.c
@@ -101,6 +101,11 @@ void ETHOSU_PMU_Disable(struct ethosu_driver *drv)
     set_clock_and_power_request(drv, ETHOSU_PMU_REQUEST, ETHOSU_CLOCK_Q_ENABLE, ETHOSU_POWER_Q_ENABLE);
 }
 
+uint32_t ETHOSU_PMU_Get_NumEventCounters(void)
+{
+    return NPU_REG_PMEVCNTR_ARRLEN;
+}
+
 void ETHOSU_PMU_Set_EVTYPER(struct ethosu_driver *drv, uint32_t num, enum ethosu_pmu_event_type type)
 {
     assert(num < ETHOSU_PMU_NCOUNTERS);
-- 
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