diff --git a/bsps/arm/stm32u5/console/console.c b/bsps/arm/stm32u5/console/console.c
index 791ceba76a..ec22bcacba 100644
--- a/bsps/arm/stm32u5/console/console.c
+++ b/bsps/arm/stm32u5/console/console.c
@@ -168,6 +168,8 @@ static bool stm32u5_uart_first_open(
   rtems_libio_open_close_args_t *args
 )
 {
+  (void) args;
+
   stm32u5_uart_context *ctx;
   UART_HandleTypeDef   *uart;
 #ifdef BSP_CONSOLE_USE_INTERRUPTS
@@ -210,6 +212,8 @@ static void stm32u5_uart_last_close(
   rtems_libio_open_close_args_t *args
 )
 {
+  (void) args;
+
 #ifdef BSP_CONSOLE_USE_INTERRUPTS
   stm32u5_uart_context *ctx;
 
@@ -220,6 +224,9 @@ static void stm32u5_uart_last_close(
     stm32u5_uart_interrupt,
     tty
   );
+#else
+  (void) tty;
+  (void) base;
 #endif
 }
 
@@ -272,6 +279,10 @@ rtems_status_code console_initialize(
   void                     *arg
 )
 {
+  (void) major;
+  (void) minor;
+  (void) arg;
+
   size_t i;
 
   rtems_termios_initialize();
diff --git a/bsps/arm/stm32u5/start/stm32u5-config-rtc.c b/bsps/arm/stm32u5/start/stm32u5-config-rtc.c
index c74ae3c279..c771c7dd0d 100644
--- a/bsps/arm/stm32u5/start/stm32u5-config-rtc.c
+++ b/bsps/arm/stm32u5/start/stm32u5-config-rtc.c
@@ -66,6 +66,8 @@ static void stm32u5_rtc_get_time( rtems_time_of_day *tod )
 
 static void stm32u5_rtc_device_initialize( int minor )
 {
+  (void) minor;
+
   hrtc.Instance            = RTC;
   hrtc.Init.HourFormat     = RTC_HOURFORMAT_24;
   hrtc.Init.AsynchPrediv   = 127;
@@ -83,6 +85,8 @@ static void stm32u5_rtc_device_initialize( int minor )
 
 static int stm32u5_rtc_device_get_time( int minor, rtems_time_of_day *tod )
 {
+  (void) minor;
+
   stm32u5_rtc_get_time( tod );
 
   return 0;
@@ -93,6 +97,8 @@ static int stm32u5_rtc_device_set_time(
   const rtems_time_of_day *tod
 )
 {
+  (void) minor;
+
   sTime.Hours   = (uint8_t) tod->hour;
   sTime.Minutes = (uint8_t) tod->minute;
   sTime.Seconds = (uint8_t) tod->second;
@@ -113,6 +119,8 @@ static int stm32u5_rtc_device_set_time(
 
 static bool stm32u5_rtc_device_probe( int minor )
 {
+  (void) minor;
+
   return true;
 }
 
@@ -131,6 +139,8 @@ rtc_tbl RTC_Table[] = {
 
 void BSP_START_TEXT_SECTION HAL_RTC_MspInit( RTC_HandleTypeDef *hrtc )
 {
+  (void) hrtc;
+
   /* Enable peripheral clocks and battery backup. */
   __HAL_RCC_PWR_CLK_ENABLE();
   HAL_PWR_EnableBkUpAccess();
diff --git a/bsps/arm/stm32u5/start/stm32u5-hal-sdmmc.c b/bsps/arm/stm32u5/start/stm32u5-hal-sdmmc.c
index 5469b34f1b..33b704a14f 100644
--- a/bsps/arm/stm32u5/start/stm32u5-hal-sdmmc.c
+++ b/bsps/arm/stm32u5/start/stm32u5-hal-sdmmc.c
@@ -74,6 +74,8 @@ static const stm32u5_gpio_config gpiod_af12 = {
 
 void HAL_SD_MspInit( SD_HandleTypeDef *hsd )
 {
+  (void) hsd;
+
   /* Set PD7 to LOW to enable power to SD Card. */
   GPIO_InitTypeDef GPIO_InitStruct = { 0 };
   __HAL_RCC_GPIOD_CLK_ENABLE();
diff --git a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_pwr.c b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_pwr.c
index a7a6fbda3e..14f494d939 100644
--- a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_pwr.c
+++ b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_pwr.c
@@ -933,6 +933,10 @@ HAL_StatusTypeDef HAL_PWR_GetConfigAttributes(uint32_t Item, uint32_t *pAttribut
     attributes = ((PWR->PRIVCFGR & PWR_PRIVCFGR_NSPRIV) == 0U) ? PWR_NSEC_NPRIV : PWR_NSEC_PRIV;
   }
 #else
+#ifdef __rtems__
+  (void) Item;
+#endif
+
   /* Get Non-Secure privileges attribute */
   attributes = ((PWR->PRIVCFGR & PWR_PRIVCFGR_NSPRIV) == 0U) ? PWR_NSEC_NPRIV : PWR_NSEC_PRIV;
 #endif /* __ARM_FEATURE_CMSE */
diff --git a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_rcc.c b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_rcc.c
index 64f56f6aee..104ff2ef13 100644
--- a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_rcc.c
+++ b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_hal_rcc.c
@@ -1666,6 +1666,10 @@ HAL_StatusTypeDef HAL_RCC_ClockConfig(const RCC_ClkInitTypeDef   *const pRCC_Clk
   */
 void HAL_RCC_MCOConfig(uint32_t RCC_MCOx, uint32_t RCC_MCOSource, uint32_t RCC_MCODiv)
 {
+#ifdef __rtems__
+  (void) RCC_MCOx;
+#endif
+
   GPIO_InitTypeDef gpio_initstruct;
   /* Check the parameters */
   assert_param(IS_RCC_MCO(RCC_MCOx));
@@ -2108,6 +2112,10 @@ void HAL_RCC_ConfigAttributes(uint32_t Item, uint32_t Attributes)
       CLEAR_BIT(RCC->PRIVCFGR, RCC_PRIVCFGR_NSPRIV);
       break;
 #else
+#ifdef __rtems__
+  (void) Item;
+#endif
+
     /* Non-secure Privilege attribute */
     case RCC_NSEC_PRIV:
       SET_BIT(RCC->PRIVCFGR, RCC_PRIVCFGR_NSPRIV);
@@ -2162,6 +2170,10 @@ HAL_StatusTypeDef HAL_RCC_GetConfigAttributes(uint32_t Item, uint32_t *pAttribut
     attributes = ((RCC->PRIVCFGR & RCC_PRIVCFGR_NSPRIV) == 0U) ? RCC_NSEC_NPRIV : RCC_NSEC_PRIV;
   }
 #else
+#ifdef __rtems__
+  (void) Item;
+#endif
+
   /* Get Non-Secure privileges attribute */
   attributes = ((RCC->PRIVCFGR & RCC_PRIVCFGR_NSPRIV) == 0U) ? RCC_NSEC_NPRIV : RCC_NSEC_PRIV;
 #endif /* __ARM_FEATURE_CMSE */
diff --git a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_ll_dac.c b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_ll_dac.c
index 7f633d19eb..399407dd2f 100644
--- a/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_ll_dac.c
+++ b/contrib/bsps/arm/stm32u5/stm32u5xx-hal-driver/Src/stm32u5xx_ll_dac.c
@@ -146,6 +146,10 @@
   */
 ErrorStatus LL_DAC_DeInit(const DAC_TypeDef *DACx)
 {
+#ifdef __rtems__
+  (void) DACx;
+#endif
+
   /* Check the parameters */
   assert_param(IS_DAC_ALL_INSTANCE(DACx));