diff --git a/cpu/stm32_common/include/periph_cpu_common.h b/cpu/stm32_common/include/periph_cpu_common.h
index 6737f6cf2c..c3168e3312 100644
--- a/cpu/stm32_common/include/periph_cpu_common.h
+++ b/cpu/stm32_common/include/periph_cpu_common.h
@@ -84,6 +84,10 @@ typedef uint32_t gpio_t;
  * @brief   Available MUX values for configuring a pin's alternate function
  */
 typedef enum {
+#ifdef CPU_FAM_STM32F1
+    GPIO_AF_OUT_PP = 0xb,   /**< alternate function output - push-pull */
+    GPIO_AF_OUT_OD = 0xf,   /**< alternate function output - open-drain */
+#else
     GPIO_AF0 = 0,           /**< use alternate function 0 */
     GPIO_AF1,               /**< use alternate function 1 */
     GPIO_AF2,               /**< use alternate function 2 */
@@ -102,6 +106,7 @@ typedef enum {
     GPIO_AF14,              /**< use alternate function 14 */
     GPIO_AF15               /**< use alternate function 15 */
 #endif
+#endif
 } gpio_af_t;
 
 /**
@@ -152,6 +157,14 @@ void periph_clk_en(bus_t bus, uint32_t mask);
  */
 void periph_clk_dis(bus_t bus, uint32_t mask);
 
+/**
+ * @brief   Configure the alternate function for the given pin
+ *
+ * @param[in] pin       pin to configure
+ * @param[in] af        alternate function to use
+ */
+void gpio_init_af(gpio_t pin, gpio_af_t af);
+
 /**
  * @brief   Configure the given pin to be used as ADC input
  *
diff --git a/cpu/stm32f0/include/periph_cpu.h b/cpu/stm32f0/include/periph_cpu.h
index a0e64eb9aa..a76b262074 100644
--- a/cpu/stm32f0/include/periph_cpu.h
+++ b/cpu/stm32f0/include/periph_cpu.h
@@ -65,7 +65,7 @@ typedef enum {
 #endif /* ndef DOXYGEN */
 
 /**
- * @brief   Available ports on the STM32F4 family
+ * @brief   Available ports on the STM32F0 family
  */
 enum {
     PORT_A = 0,             /**< port A */
@@ -108,16 +108,6 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
-/**
- * @brief   Configure the alternate function for the given pin
- *
- * @note    This is meant for internal use in STM32F4 peripheral drivers only
- *
- * @param[in] pin       pin to configure
- * @param[in] af        alternate function to use
- */
-void gpio_init_af(gpio_t pin, gpio_af_t af);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpu/stm32f1/include/periph_cpu.h b/cpu/stm32f1/include/periph_cpu.h
index 4ebe15fd98..518733bd5a 100644
--- a/cpu/stm32f1/include/periph_cpu.h
+++ b/cpu/stm32f1/include/periph_cpu.h
@@ -106,17 +106,6 @@ enum {
     PORT_G = 6,             /**< port G */
 };
 
-/**
- * @brief   Define alternate function modes
- *
- * On this CPU, only the output pins have alternate function modes. The input
- * pins have to be configured using the default gpio_init() function.
- */
-typedef enum {
-    GPIO_AF_OUT_PP = 0xb,   /**< alternate function output - push-pull */
-    GPIO_AF_OUT_OD = 0xf,   /**< alternate function output - open-drain */
-} gpio_af_out_t;
-
 /**
  * @brief   ADC channel configuration data
  */
@@ -146,16 +135,6 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
-/**
- * @brief   Configure the alternate function for the given pin
- *
- * @note    This is meant for internal use in STM32F1 peripheral drivers only
- *
- * @param[in] pin       pin to configure
- * @param[in] af        alternate function to use
- */
-void gpio_init_af(gpio_t pin, gpio_af_out_t af);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpu/stm32f1/periph/gpio.c b/cpu/stm32f1/periph/gpio.c
index f7670120a4..ccd03b2646 100644
--- a/cpu/stm32f1/periph/gpio.c
+++ b/cpu/stm32f1/periph/gpio.c
@@ -134,7 +134,7 @@ int gpio_init_int(gpio_t pin, gpio_mode_t mode, gpio_flank_t flank,
     return 0;
 }
 
-void gpio_init_af(gpio_t pin, gpio_af_out_t af)
+void gpio_init_af(gpio_t pin, gpio_af_t af)
 {
     int pin_num = _pin_num(pin);
     GPIO_TypeDef *port = _port(pin);
diff --git a/cpu/stm32f2/include/periph_cpu.h b/cpu/stm32f2/include/periph_cpu.h
index 2c15dce26d..ca3d155a65 100644
--- a/cpu/stm32f2/include/periph_cpu.h
+++ b/cpu/stm32f2/include/periph_cpu.h
@@ -127,16 +127,6 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
-/**
- * @brief   Configure the alternate function for the given pin
- *
- * @note    This is meant for internal use in STM32F2 peripheral drivers only
- *
- * @param[in] pin       pin to configure
- * @param[in] af        alternate function to use
- */
-void gpio_init_af(gpio_t pin, gpio_af_t af);
-
 /**
  * @brief   Configure the given pin to be used as ADC input
  *
diff --git a/cpu/stm32f4/include/periph_cpu.h b/cpu/stm32f4/include/periph_cpu.h
index c010d32cbb..70cbbafb49 100644
--- a/cpu/stm32f4/include/periph_cpu.h
+++ b/cpu/stm32f4/include/periph_cpu.h
@@ -136,16 +136,6 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
-/**
- * @brief   Configure the alternate function for the given pin
- *
- * @note    This is meant for internal use in STM32F4 peripheral drivers only
- *
- * @param[in] pin       pin to configure
- * @param[in] af        alternate function to use
- */
-void gpio_init_af(gpio_t pin, gpio_af_t af);
-
 /**
  * @brief   Power on the DMA device the given stream belongs to
  *
diff --git a/cpu/stm32l1/include/periph_cpu.h b/cpu/stm32l1/include/periph_cpu.h
index 37bbeb9c0f..1ffd93850d 100644
--- a/cpu/stm32l1/include/periph_cpu.h
+++ b/cpu/stm32l1/include/periph_cpu.h
@@ -76,16 +76,6 @@ typedef struct {
     uint8_t chan;           /**< DAC device used for this line */
 } dac_conf_t;
 
-/**
- * @brief   Configure the alternate function for the given pin
- *
- * @note    This is meant for internal use in STM32L1 peripheral drivers only
- *
- * @param[in] pin       pin to configure
- * @param[in] af        alternate function to use
- */
-void gpio_init_af(gpio_t pin, gpio_af_t af);
-
 /**
  * @brief   I2C configuration data structure
  */