Specify the alternative function to be configured for the specified
           pins. Functions are only valid for gpio pins.
         enum: [ gpio, cci_i2c0, blsp_uim1, blsp_uim2, blsp_uim3, blsp_uim5,
-                blsp_i2c1, blsp_i2c2, blsp_i2c3, blsp_i2c5, blsp_spi1,
+                blsp_i2c1, blsp_i2c2, blsp_i2c3, blsp_i2c4, blsp_i2c5, blsp_spi1,
                 blsp_spi2, blsp_spi3, blsp_spi5, blsp_uart1, blsp_uart2,
-                blsp_uart3, blsp_uart5, cam_mclk0, cam_mclk1, wlan ]
+                blsp_uart3, blsp_uart4, blsp_uart5, cam_mclk0, cam_mclk1, sdc3,
+                wlan ]
 
       bias-pull-down: true
-
       bias-pull-up: true
-
       bias-disable: true
       drive-strength: true
-
+      input-enable: true
       output-high: true
-
       output-low: true
 
     required: