BSP optional I2C pull up

Author: adamkaliszan

bsp/esp_bsp_generic/Kconfig

@@ -20,8 +20,14 @@ menu "Board Support Package (generic)"
                 range -1 ENV_GPIO_OUT_RANGE_MAX
                 help
                     The GPIO pin for I2C SDA.
+            config BSP_I2C_PULLUP
+                bool "I2C GPIO PULL UP"
+                default n
+                help
+                    Enable I2C bus pull up.            
         endmenu
-        config BSP_I2C_NUM
+
+    config BSP_I2C_NUM
             int "I2C peripheral index"
             default 1
             range 0 1

bsp/esp_bsp_generic/src/esp_bsp_generic.c

@@ -324,6 +324,9 @@ esp_err_t bsp_i2c_init(void)
         .sda_io_num = BSP_I2C_SDA,
         .scl_io_num = BSP_I2C_SCL,
         .clk_source = I2C_CLK_SRC_DEFAULT,
+#ifdef CONFIG_BSP_I2C_GPIO_PULLUP
+        .flags.enable_internal_pullup = 1,
+#endif
     };
     BSP_ERROR_CHECK_RETURN_ERR(i2c_new_master_bus(&i2c_config, &i2c_handle));