diff --git a/Makefile b/Makefile
index 67eeac7..1b4e1a7 100644
--- a/Makefile
+++ b/Makefile
@@ -36,7 +36,7 @@ C_FLAGS += -fpic
 
 C_FLAGS += -O0 -g -Wall -Wextra -Werror
 CPP_FLAGS += $(addprefix -I, $(INCLUDES))
-CHECK_FLAGS = --enable=all --template=gcc --error-exitcode=1 --suppress=missingIncludeSystem
+CHECK_FLAGS = --enable=all --template=gcc --error-exitcode=1 --suppress=missingIncludeSystem --inline-suppr $(C_SRCS)
 
 C_SRCS = $(wildcard $(SRC_DIR)/*.c)
 C_OBJS = $(patsubst $(SRC_DIR)%,$(OBJ_DIR)%,$(patsubst %.c,%.o,$(C_SRCS)))
diff --git a/src/gpio.c b/src/gpio.c
index 238a81d..4659398 100644
--- a/src/gpio.c
+++ b/src/gpio.c
@@ -32,6 +32,7 @@ static int ftdi_open(const struct gpio *gpio)
     return EXIT_SUCCESS;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_open(const struct gpio *gpio)
 {
     int res;
@@ -72,6 +73,7 @@ int gpio_open(const struct gpio *gpio)
     return EXIT_SUCCESS;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_close(const struct gpio *gpio)
 {
     if(NULL == gpio) {
@@ -90,6 +92,7 @@ int gpio_close(const struct gpio *gpio)
     return EXIT_SUCCESS;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_read(const struct gpio *gpio, unsigned int *value)
 {
     if(NULL == gpio || NULL == value) {
@@ -134,6 +137,7 @@ int gpio_write(const struct gpio *gpio, unsigned int value)
     return EXIT_SUCCESS;
 }
 
+// cppcheck-suppress unusedFunction
 int gpio_toggle(const struct gpio *gpio)
 {
     int res;