BSP optional I2C pull up

Author: adamkaliszan

bsp/esp_bsp_generic/Kconfig

@@ -20,6 +20,11 @@ menu "Board Support Package (generic)"
                 range -1 ENV_GPIO_OUT_RANGE_MAX
                 help
                     The GPIO pin for I2C SDA.
+            config BSP_I2C_GPIO_PULLUP
+                bool "I2C GPIO PULL UP"
+                default n
+                help
+                    Enable I2C bus pull up.
         endmenu
         config BSP_I2C_NUM
             int "I2C peripheral index"

bsp/esp_bsp_generic/include/bsp/esp_bsp_generic.h

@@ -50,6 +50,8 @@
 /* I2C */
 #define BSP_I2C_SCL         (CONFIG_BSP_I2C_GPIO_SCL)
 #define BSP_I2C_SDA         (CONFIG_BSP_I2C_GPIO_SDA)
+#define BSP_I2C_PULLUP      (CONFIG_BSP_I2C_GPIO_PULLUP)
+
 
 /* SD card */
 #define BSP_SD_CMD          (CONFIG_BSP_SD_CMD)

bsp/esp_bsp_generic/src/esp_bsp_generic.c

@@ -324,6 +324,7 @@ 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,
+        .flags.enable_internal_pullup = BSP_I2C_PULLUP,
     };
     BSP_ERROR_CHECK_RETURN_ERR(i2c_new_master_bus(&i2c_config, &i2c_handle));