diff --git a/arch/arm/src/cxd56xx/cxd56_gnss.c b/arch/arm/src/cxd56xx/cxd56_gnss.c
index 8325b89aa0b..13c739abaed 100644
--- a/arch/arm/src/cxd56xx/cxd56_gnss.c
+++ b/arch/arm/src/cxd56xx/cxd56_gnss.c
@@ -389,6 +389,11 @@ static struct pm_cpu_freqlock_s g_lv_lock =
   PM_CPUFREQLOCK_INIT(PM_CPUFREQLOCK_TAG('G', 'T', 0),
                       PM_CPUFREQLOCK_FLAG_LV);
 
+/* Lock to prohibit clock change in gnss open */
+
+static struct pm_cpu_freqlock_s g_hold_lock =
+  PM_CPUFREQLOCK_INIT(0, PM_CPUFREQLOCK_FLAG_HOLD);
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -2632,7 +2637,16 @@ static int cxd56_gnss_open(FAR struct file *filep)
 
       nxsem_set_protocol(&priv->syncsem, SEM_PRIO_NONE);
 
+      /* Prohibit the clock change during loading image */
+
+      up_pm_acquire_freqlock(&g_hold_lock);
+
       ret = fw_pm_loadimage(CXD56_GNSS_GPS_CPUID, CXD56_GNSS_FWNAME);
+
+      /* Allow the clock change after loading image */
+
+      up_pm_release_freqlock(&g_hold_lock);
+
       if (ret < 0)
         {
           goto _err1;