diff --git a/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts b/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
index 40b9405f1a8e..9b9a18bbb20a 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
@@ -32,7 +32,6 @@ &gpio {
 	 * This is based on the unreleased schematic for the Model A+.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -67,21 +66,21 @@ &gpio {
 			  "GPIO27",
 			  "SDA0",
 			  "SCL0",
-			  "NC", /* GPIO30 */
-			  "NC", /* GPIO31 */
+			  "", /* GPIO30 */
+			  "", /* GPIO31 */
 			  "CAM_GPIO1", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
 			  "PWR_LOW_N", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
 			  "USB_LIMIT", /* GPIO38 */
-			  "NC", /* GPIO39 */
+			  "", /* GPIO39 */
 			  "PWM0_OUT", /* GPIO40 */
 			  "CAM_GPIO0", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
-			  "NC", /* GPIO44 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
+			  "", /* GPIO44 */
 			  "PWM1_OUT", /* GPIO45 */
 			  "HDMI_HPD_N",
 			  "STATUS_LED",
diff --git a/arch/arm/boot/dts/bcm2835-rpi-a.dts b/arch/arm/boot/dts/bcm2835-rpi-a.dts
index 11edb581dbaf..f664e4fced93 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-a.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-a.dts
@@ -26,7 +26,6 @@ &gpio {
 	 * RPI00021 sheet 02
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -42,41 +41,41 @@ &gpio {
 			  "SPI_MISO",
 			  "SPI_MOSI",
 			  "SPI_SCLK",
-			  "NC", /* GPIO12 */
-			  "NC", /* GPIO13 */
+			  "", /* GPIO12 */
+			  "", /* GPIO13 */
 			  /* Serial port */
 			  "TXD0",
 			  "RXD0",
 			  "STATUS_LED_N",
 			  "GPIO17",
 			  "GPIO18",
-			  "NC", /* GPIO19 */
-			  "NC", /* GPIO20 */
+			  "", /* GPIO19 */
+			  "", /* GPIO20 */
 			  "GPIO21",
 			  "GPIO22",
 			  "GPIO23",
 			  "GPIO24",
 			  "GPIO25",
-			  "NC", /* GPIO26 */
+			  "", /* GPIO26 */
 			  "CAM_GPIO0",
 			  /* Binary number representing build/revision */
 			  "CONFIG0",
 			  "CONFIG1",
 			  "CONFIG2",
 			  "CONFIG3",
-			  "NC", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
-			  "NC", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
-			  "NC", /* GPIO38 */
-			  "NC", /* GPIO39 */
+			  "", /* GPIO32 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
+			  "", /* GPIO35 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
+			  "", /* GPIO38 */
+			  "", /* GPIO39 */
 			  "PWM0_OUT",
-			  "NC", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
-			  "NC", /* GPIO44 */
+			  "", /* GPIO41 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
+			  "", /* GPIO44 */
 			  "PWM1_OUT",
 			  "HDMI_HPD_P",
 			  "SD_CARD_DET",
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
index 1b435c64bd9c..7b7c363e5ee8 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
@@ -34,7 +34,6 @@ &gpio {
 	 * RPI-BPLUS sheet 1
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -69,20 +68,20 @@ &gpio {
 			  "GPIO27",
 			  "SDA0",
 			  "SCL0",
-			  "NC", /* GPIO30 */
+			  "", /* GPIO30 */
 			  "LAN_RUN", /* GPIO31 */
 			  "CAM_GPIO1", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
 			  "PWR_LOW_N", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
 			  "USB_LIMIT", /* GPIO38 */
-			  "NC", /* GPIO39 */
+			  "", /* GPIO39 */
 			  "PWM0_OUT", /* GPIO40 */
 			  "CAM_GPIO0", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
 			  "ETHCLK", /* GPIO44 */
 			  "PWM1_OUT", /* GPIO45 */
 			  "HDMI_HPD_N",
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
index a23c25c00eea..f5b66d3f4ff3 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts
@@ -27,7 +27,6 @@ &gpio {
 	 * RPI00022 sheet 02
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -43,40 +42,40 @@ &gpio {
 			  "SPI_MISO",
 			  "SPI_MOSI",
 			  "SPI_SCLK",
-			  "NC", /* GPIO12 */
-			  "NC", /* GPIO13 */
+			  "", /* GPIO12 */
+			  "", /* GPIO13 */
 			  /* Serial port */
 			  "TXD0",
 			  "RXD0",
 			  "STATUS_LED_N",
 			  "GPIO17",
 			  "GPIO18",
-			  "NC", /* GPIO19 */
-			  "NC", /* GPIO20 */
+			  "", /* GPIO19 */
+			  "", /* GPIO20 */
 			  "CAM_GPIO",
 			  "GPIO22",
 			  "GPIO23",
 			  "GPIO24",
 			  "GPIO25",
-			  "NC", /* GPIO26 */
+			  "", /* GPIO26 */
 			  "GPIO27",
 			  "GPIO28",
 			  "GPIO29",
 			  "GPIO30",
 			  "GPIO31",
-			  "NC", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
-			  "NC", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
-			  "NC", /* GPIO38 */
-			  "NC", /* GPIO39 */
+			  "", /* GPIO32 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
+			  "", /* GPIO35 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
+			  "", /* GPIO38 */
+			  "", /* GPIO39 */
 			  "PWM0_OUT",
-			  "NC", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
-			  "NC", /* GPIO44 */
+			  "", /* GPIO41 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
+			  "", /* GPIO44 */
 			  "PWM1_OUT",
 			  "HDMI_HPD_P",
 			  "SD_CARD_DET",
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts b/arch/arm/boot/dts/bcm2835-rpi-b.dts
index 25d87212cefd..f589bede2b11 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts
@@ -27,7 +27,6 @@ &gpio {
 	 * RPI00021 sheet 02
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -43,40 +42,40 @@ &gpio {
 			  "SPI_MISO",
 			  "SPI_MOSI",
 			  "SPI_SCLK",
-			  "NC", /* GPIO12 */
-			  "NC", /* GPIO13 */
+			  "", /* GPIO12 */
+			  "", /* GPIO13 */
 			  /* Serial port */
 			  "TXD0",
 			  "RXD0",
 			  "STATUS_LED_N",
 			  "GPIO17",
 			  "GPIO18",
-			  "NC", /* GPIO19 */
-			  "NC", /* GPIO20 */
+			  "", /* GPIO19 */
+			  "", /* GPIO20 */
 			  "CAM_GPIO0",
 			  "GPIO22",
 			  "GPIO23",
 			  "GPIO24",
 			  "GPIO25",
-			  "NC", /* GPIO26 */
+			  "", /* GPIO26 */
 			  "GPIO27",
 			  "GPIO28",
 			  "GPIO29",
 			  "GPIO30",
 			  "GPIO31",
-			  "NC", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
-			  "NC", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
-			  "NC", /* GPIO38 */
-			  "NC", /* GPIO39 */
+			  "", /* GPIO32 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
+			  "", /* GPIO35 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
+			  "", /* GPIO38 */
+			  "", /* GPIO39 */
 			  "PWM0_OUT",
-			  "NC", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
-			  "NC", /* GPIO44 */
+			  "", /* GPIO41 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
+			  "", /* GPIO44 */
 			  "PWM1_OUT",
 			  "HDMI_HPD_P",
 			  "SD_CARD_DET",
diff --git a/arch/arm/boot/dts/bcm2835-rpi-cm1-io1.dts b/arch/arm/boot/dts/bcm2835-rpi-cm1-io1.dts
index a75c882e6575..87958a96c3e0 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-cm1-io1.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-cm1-io1.dts
@@ -13,7 +13,6 @@ &gpio {
 	 * This is based on the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts b/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
index 8b043ab62dc8..596bb1ef994e 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
@@ -39,7 +39,6 @@ &gpio {
 	 * This is based on the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -88,7 +87,7 @@ &gpio {
 			  "SD1_DATA3",
 			  "CAM_GPIO1", /* GPIO40 */
 			  "WL_ON", /* GPIO41 */
-			  "NC", /* GPIO42 */
+			  "", /* GPIO42 */
 			  "WIFI_CLK", /* GPIO43 */
 			  "CAM_GPIO0", /* GPIO44 */
 			  "BT_ON", /* GPIO45 */
diff --git a/arch/arm/boot/dts/bcm2835-rpi-zero.dts b/arch/arm/boot/dts/bcm2835-rpi-zero.dts
index 6f9b3a908f28..a65c2bca69ea 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-zero.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-zero.dts
@@ -29,7 +29,6 @@ &gpio {
 	 * This is based on the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
@@ -64,22 +63,22 @@ &gpio {
 			  "GPIO27",
 			  "SDA0",
 			  "SCL0",
-			  "NC", /* GPIO30 */
-			  "NC", /* GPIO31 */
+			  "", /* GPIO30 */
+			  "", /* GPIO31 */
 			  "CAM_GPIO1", /* GPIO32 */
-			  "NC", /* GPIO33 */
-			  "NC", /* GPIO34 */
-			  "NC", /* GPIO35 */
-			  "NC", /* GPIO36 */
-			  "NC", /* GPIO37 */
-			  "NC", /* GPIO38 */
-			  "NC", /* GPIO39 */
-			  "NC", /* GPIO40 */
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
+			  "", /* GPIO35 */
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
+			  "", /* GPIO38 */
+			  "", /* GPIO39 */
+			  "", /* GPIO40 */
 			  "CAM_GPIO0", /* GPIO41 */
-			  "NC", /* GPIO42 */
-			  "NC", /* GPIO43 */
-			  "NC", /* GPIO44 */
-			  "NC", /* GPIO45 */
+			  "", /* GPIO42 */
+			  "", /* GPIO43 */
+			  "", /* GPIO44 */
+			  "", /* GPIO45 */
 			  "HDMI_HPD_N",
 			  "STATUS_LED_N",
 			  /* Used by SD Card */
diff --git a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
index d8af8eeac7b6..c824a2cea02e 100644
--- a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+++ b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
@@ -34,7 +34,6 @@ &gpio {
 	 * the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
index d73daf5bff1d..f7222a28903e 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
@@ -55,7 +55,6 @@ &gpio {
 	 * This is mostly based on the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
index c263f5b48b96..fd4ac6f2d077 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
@@ -61,7 +61,6 @@ &gpio {
 	 * the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
index 42b5383b55d8..00ea439d601d 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
@@ -54,7 +54,6 @@ &gpio {
 	 * the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts b/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts
index 3dfce4312dfc..cf84e69fced8 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts
@@ -13,7 +13,6 @@ &gpio {
 	 * This is based on the official GPU firmware DT blob.
 	 *
 	 * Legend:
-	 * "NC" = not connected (no rail from the SoC)
 	 * "FOO" = GPIO line named "FOO" on the schematic
 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
 	 */
diff --git a/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
index 828a20561b96..f57b4ca145dd 100644
--- a/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
+++ b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
@@ -41,12 +41,12 @@ expgpio: gpio {
 		#gpio-cells = <2>;
 		gpio-line-names = "HDMI_HPD_N",
 				  "EMMC_EN_N",
-				  "NC",
-				  "NC",
-				  "NC",
-				  "NC",
-				  "NC",
-				  "NC";
+				  "",
+				  "",
+				  "",
+				  "",
+				  "",
+				  "";
 		status = "okay";
 	};
 };
