cpu/saml21: extends exti configuration for saml21 variants

Added a configuration for saml21g18a and fixes the configuration for samr30g18a

cpu/saml21/include/periph_cpu.h

@@ -29,12 +29,45 @@ extern "C" {
 /**
  * @brief   Mapping of pins to EXTI lines, -1 means not EXTI possible
  */
+#if defined(CPU_MODEL_SAML21E18A) || defined(CPU_MODEL_SAML21E18B) || \
+    defined(CPU_MODEL_SAML21E17A) || defined(CPU_MODEL_SAML21E17B) || \
+    defined(CPU_MODEL_SAML21E16A) || defined(CPU_MODEL_SAML21E16B) || \
+    defined(CPU_MODEL_SAML21E15A) || defined(CPU_MODEL_SAML21E15B)
+static const int8_t exti_config[1][32] = {
+    { 0,  1,  2,  3,  4,  5,  6,  7, -1,  9, 10, 11, -1, -1, 14, 15,
+      0,  1,  2,  3, -1, -1,  6,  7, 12, 13, -1, 15, -1, -1, 10, 11},
+};
+#else /* CPU_MODEL_SAML21E */
 static const int8_t exti_config[2][32] = {
+#if defined(CPU_MODEL_SAML21G18A) || defined(CPU_MODEL_SAML21G18B) || \
+    defined(CPU_MODEL_SAML21G17A) || defined(CPU_MODEL_SAML21G17B) || \
+    defined(CPU_MODEL_SAML21G16A) || defined(CPU_MODEL_SAML21G16B)
+    { 0,  1,  2,  3,  4,  5,  6,  7, -1,  9, 10, 11, 12, 13, 14, 15,
+      0,  1,  2,  3,  4,  5,  6,  7, 12, 13, -1, 15, -1, -1, 10, 11},
+    {-1, -1,  2,  3, -1, -1, -1, -1,  8,  9, 10, 11, -1, -1, -1, -1,
+     -1, -1, -1, -1, -1, -1,  6,  7, -1, -1, -1, -1, -1, -1, -1, -1},
+#elif defined(CPU_MODEL_SAML21J18A) || defined(CPU_MODEL_SAML21J18B) || \
+      defined(CPU_MODEL_SAML21J17A) || defined(CPU_MODEL_SAML21J17B) || \
+      defined(CPU_MODEL_SAML21J16A) || defined(CPU_MODEL_SAML21J16B)
     { 0,  1,  2,  3,  4,  5,  6,  7, -1,  9, 10, 11, 12, 13, 14, 15,
       0,  1,  2,  3,  4,  5,  6,  7, 12, 13, -1, 15, -1, -1, 10, 11},
     { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
       0,  1, -1, -1, -1, -1,  6,  7, -1, -1, -1, -1, -1, -1, 14, 15},
+#elif defined(CPU_MODEL_SAMR30G18A)
+    { 0,  1, -1, -1,  4,  5,  6,  7, -1,  9, 10, 11, 12, 13, 14, 15,
+      0,  1,  2,  3,  4, -1,  6,  7, 12, 13, -1, 15,  8, -1, 10, 11},
+    { 0, -1,  2,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15,
+      0,  1, -1, -1, -1, -1,  6,  7, -1, -1, -1, -1, -1, -1, 14, 15},
+#elif defined(CPU_MODEL_SAMR30E18A)
+    {-1, -1, -1, -1, -1, -1,  6,  7, -1,  9, 10, 11, -1, -1, 14, 15,
+      0,  1,  2,  3,  4, -1, -1, -1, 12, 13, -1, 15,  8, -1, 10, 11},
+    { 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15,
+      0,  1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 14, 15},
+#else
+    #error Please define a proper CPU_MODEL.
+#endif
 };
+#endif /* CPU_MODEL_SAML21E */
 
 #define HAVE_ADC_RES_T
 typedef enum {