STM32F767ZI - I2C FastModePlus not properly enabled 2/2

Warning: sometimes I2C_FASTMODEPLUS_I2Cx is defined,
even if not supported by some chip within the family

Author: ABOSTM

targets/TARGET_STM/i2c_api.c

@@ -381,25 +381,33 @@ void i2c_frequency(i2c_t *obj, int hz)
 
     // Enable the Fast Mode Plus capability
     if (hz == 1000000) {
-#if defined(I2C1_BASE) && defined (I2C_FASTMODEPLUS_I2C1)
+#if defined(I2C1_BASE) && defined(I2C_FASTMODEPLUS_I2C1)  // sometimes I2C_FASTMODEPLUS_I2Cx is define even if not supported by the chip
+#if defined(SYSCFG_CFGR1_I2C_FMP_I2C1) || defined(SYSCFG_CFGR1_I2C1_FMP) || defined(SYSCFG_PMC_I2C1_FMP) || defined(SYSCFG_PMCR_I2C1_FMP) || defined(SYSCFG_CFGR2_I2C1_FMP)
         if (obj_s->i2c == I2C_1) {
             HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C1);
         }
 #endif
-#if defined(I2C2_BASE) && defined (I2C_FASTMODEPLUS_I2C2)
+#endif
+#if defined(I2C2_BASE) && defined(I2C_FASTMODEPLUS_I2C2)  // sometimes I2C_FASTMODEPLUS_I2Cx is define even if not supported by the chip
+#if defined(SYSCFG_CFGR1_I2C_FMP_I2C2) || defined(SYSCFG_CFGR1_I2C2_FMP) || defined(SYSCFG_PMC_I2C2_FMP) || defined(SYSCFG_PMCR_I2C2_FMP) || defined(SYSCFG_CFGR2_I2C2_FMP)
         if (obj_s->i2c == I2C_2) {
             HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C2);
         }
 #endif
-#if defined(I2C3_BASE) && defined (I2C_FASTMODEPLUS_I2C3)
+#endif
+#if defined(I2C3_BASE) && defined (I2C_FASTMODEPLUS_I2C3)  // sometimes I2C_FASTMODEPLUS_I2Cx is define even if not supported by the chip
+#if defined(SYSCFG_CFGR1_I2C_FMP_I2C3) || defined(SYSCFG_CFGR1_I2C3_FMP) || defined(SYSCFG_PMC_I2C3_FMP) || defined(SYSCFG_PMCR_I2C3_FMP) || defined(SYSCFG_CFGR2_I2C3_FMP)
         if (obj_s->i2c == I2C_3) {
             HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C3);
         }
 #endif
-#if defined(I2C4_BASE) && defined (I2C_FASTMODEPLUS_I2C4)
+#endif
+#if defined(I2C4_BASE) && defined (I2C_FASTMODEPLUS_I2C4)  // sometimes I2C_FASTMODEPLUS_I2Cx is define even if not supported by the chip
+#if defined(SYSCFG_CFGR1_I2C_FMP_I2C4) || defined(SYSCFG_CFGR1_I2C4_FMP) || defined(SYSCFG_PMC_I2C4_FMP) || defined(SYSCFG_PMCR_I2C4_FMP) || defined(SYSCFG_CFGR2_I2C4_FMP)
         if (obj_s->i2c == I2C_4) {
             HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C4);
         }
+#endif
 #endif
     }
 #endif //I2C_IP_VERSION_V2