diff --git a/.github/workflows/build_arm.yml b/.github/workflows/build_arm.yml
index 3abfd50a8..8a3181440 100644
--- a/.github/workflows/build_arm.yml
+++ b/.github/workflows/build_arm.yml
@@ -48,9 +48,8 @@ jobs:
         - 'stm32f0 stm32f1'
         - 'stm32f4'
         - 'stm32f7'
-        - 'stm32g4 stm32wb'
-        - 'stm32h7'
-        - 'stm32l0 stm32l4'
+        - 'stm32g4 stm32h7'
+        - 'stm32l0 stm32l4 stm32u5 stm32wb'
         - 'tm4c123 xmc4000'
     steps:
     - name: Setup Python
diff --git a/examples/rules.mk b/examples/rules.mk
index 59cf4fd1f..b85837c16 100644
--- a/examples/rules.mk
+++ b/examples/rules.mk
@@ -66,6 +66,10 @@ ifeq ($(NO_LTO),1)
 CFLAGS := $(filter-out -flto,$(CFLAGS))
 endif
 
+ifneq ($(CFLAGS_SKIP),)
+CFLAGS := $(filter-out $(CFLAGS_SKIP),$(CFLAGS))
+endif
+
 LDFLAGS += $(CFLAGS) -Wl,-Map=$@.map -Wl,-cref -Wl,-gc-sections
 
 ifdef LD_FILE
diff --git a/hw/bsp/samd11/family.mk b/hw/bsp/samd11/family.mk
index dc6678b30..a2a5268aa 100644
--- a/hw/bsp/samd11/family.mk
+++ b/hw/bsp/samd11/family.mk
@@ -9,10 +9,15 @@ CFLAGS += \
   -nostdlib -nostartfiles \
   -DCONF_DFLL_OVERWRITE_CALIBRATION=0 \
   -DOSC32K_OVERWRITE_CALIBRATION=0 \
+  -DCFG_EXAMPLE_MSC_READONLY \
+  -DCFG_EXAMPLE_VIDEO_READONLY \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD11
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
diff --git a/hw/bsp/samd21/family.mk b/hw/bsp/samd21/family.mk
index 6d02d7fa6..30eccacb2 100644
--- a/hw/bsp/samd21/family.mk
+++ b/hw/bsp/samd21/family.mk
@@ -13,7 +13,10 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD21
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
diff --git a/hw/bsp/samd51/family.mk b/hw/bsp/samd51/family.mk
index 3ecc5aa66..657e33438 100644
--- a/hw/bsp/samd51/family.mk
+++ b/hw/bsp/samd51/family.mk
@@ -13,8 +13,8 @@ CFLAGS += \
   -nostdlib -nostartfiles \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD51
 
-# suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \
diff --git a/hw/bsp/same5x/family.mk b/hw/bsp/same5x/family.mk
index 7f8692c97..df1af4a9d 100644
--- a/hw/bsp/same5x/family.mk
+++ b/hw/bsp/same5x/family.mk
@@ -13,8 +13,8 @@ CFLAGS += \
   -nostdlib -nostartfiles \
   -DCFG_TUSB_MCU=OPT_MCU_SAME5X
 
-# suppress warning caused by vendor mcu driver
-#CFLAGS += -Wno-error=cast-qual
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 SRC_C += \
   src/portable/microchip/samd/dcd_samd.c \
diff --git a/hw/bsp/same70_qmtech/board.mk b/hw/bsp/same70_qmtech/board.mk
index 1dcb8bfcd..ad5af2020 100644
--- a/hw/bsp/same70_qmtech/board.mk
+++ b/hw/bsp/same70_qmtech/board.mk
@@ -11,7 +11,10 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAMX7X
 
 # suppress following warnings from mcu driver
-CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 ASF_DIR = hw/mcu/microchip/same70
 
diff --git a/hw/bsp/same70_xplained/board.mk b/hw/bsp/same70_xplained/board.mk
index 95c4aaaa2..769d03e21 100644
--- a/hw/bsp/same70_xplained/board.mk
+++ b/hw/bsp/same70_xplained/board.mk
@@ -11,7 +11,10 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAMX7X
 
 # suppress following warnings from mcu driver
-CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 ASF_DIR = hw/mcu/microchip/same70
 
diff --git a/hw/bsp/samg55xplained/board.mk b/hw/bsp/samg55xplained/board.mk
index 7cc9487fd..ed0d59772 100644
--- a/hw/bsp/samg55xplained/board.mk
+++ b/hw/bsp/samg55xplained/board.mk
@@ -12,7 +12,10 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAMG
 
 # suppress following warnings from mcu driver
-CFLAGS += -Wno-error=undef -Wno-error=cast-qual -Wno-error=null-dereference -Wno-error=redundant-decls
+CFLAGS += -Wno-error=undef -Wno-error=null-dereference -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 ASF_DIR = hw/mcu/microchip/samg55
 
diff --git a/hw/bsp/saml2x/family.mk b/hw/bsp/saml2x/family.mk
index 6022158de..91c2cfa61 100644
--- a/hw/bsp/saml2x/family.mk
+++ b/hw/bsp/saml2x/family.mk
@@ -14,7 +14,10 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAML22
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
+CFLAGS += -Wno-error=redundant-decls
+
+# SAM driver is flooded with -Wcast-qual which slow down complication significantly
+CFLAGS_SKIP += -Wcast-qual
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \