#include <dt-bindings/interrupt-controller/irq.h>
 
     gpio@fffff400 {
-            compatible = "atmel,at91rm9200-gpio";
-            reg = <0xfffff400 0x200>;
-            interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
-            #gpio-cells = <2>;
-            gpio-controller;
-            interrupt-controller;
-            #interrupt-cells = <2>;
-            clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+        compatible = "atmel,at91rm9200-gpio";
+        reg = <0xfffff400 0x200>;
+        interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
+        #gpio-cells = <2>;
+        gpio-controller;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+        clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
     };
 ...
 
 examples:
   - |
     spi {
-            #address-cells = <1>;
-            #size-cells = <0>;
-
-            gpio5: gpio5@0 {
-                    compatible = "fairchild,74hc595";
-                    reg = <0>;
-                    gpio-controller;
-                    #gpio-cells = <2>;
-                    registers-number = <4>;
-                    spi-max-frequency = <100000>;
-            };
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio5@0 {
+            compatible = "fairchild,74hc595";
+            reg = <0>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            registers-number = <4>;
+            spi-max-frequency = <100000>;
+        };
     };
 
         reg = <0x80018000 0x2000>;
 
         gpio@0 {
-                compatible = "fsl,imx28-gpio";
-                reg = <0>;
-                interrupts = <127>;
-                gpio-controller;
-                #gpio-cells = <2>;
-                interrupt-controller;
-                #interrupt-cells = <2>;
+            compatible = "fsl,imx28-gpio";
+            reg = <0>;
+            interrupts = <127>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
         };
 
         gpio@1 {
-                compatible = "fsl,imx28-gpio";
-                reg = <1>;
-                interrupts = <126>;
-                gpio-controller;
-                #gpio-cells = <2>;
-                interrupt-controller;
-                #interrupt-cells = <2>;
+            compatible = "fsl,imx28-gpio";
+            reg = <1>;
+            interrupts = <126>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
         };
 
         gpio@2 {
-                compatible = "fsl,imx28-gpio";
-                reg = <2>;
-                interrupts = <125>;
-                gpio-controller;
-                #gpio-cells = <2>;
-                interrupt-controller;
-                #interrupt-cells = <2>;
+            compatible = "fsl,imx28-gpio";
+            reg = <2>;
+            interrupts = <125>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
         };
 
         gpio@3 {
-                compatible = "fsl,imx28-gpio";
-                reg = <3>;
-                interrupts = <124>;
-                gpio-controller;
-                #gpio-cells = <2>;
-                interrupt-controller;
-                #interrupt-cells = <2>;
+            compatible = "fsl,imx28-gpio";
+            reg = <3>;
+            interrupts = <124>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
         };
 
         gpio@4 {
-                compatible = "fsl,imx28-gpio";
-                reg = <4>;
-                interrupts = <123>;
-                gpio-controller;
-                #gpio-cells = <2>;
-                interrupt-controller;
-                #interrupt-cells = <2>;
+            compatible = "fsl,imx28-gpio";
+            reg = <4>;
+            interrupts = <123>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
         };
     };
 
 examples:
   - |
     i2c {
-            #address-cells = <1>;
-            #size-cells = <0>;
-
-            pcf8575: gpio@20 {
-                    compatible = "nxp,pcf8575";
-                    reg = <0x20>;
-                    interrupt-parent = <&irqpin2>;
-                    interrupts = <3 0>;
-                    gpio-controller;
-                    #gpio-cells = <2>;
-                    interrupt-controller;
-                    #interrupt-cells = <2>;
-            };
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio@20 {
+            compatible = "nxp,pcf8575";
+            reg = <0x20>;
+            interrupt-parent = <&irqpin2>;
+            interrupts = <3 0>;
+            gpio-controller;
+            #gpio-cells = <2>;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+        };
     };
 
 
 examples:
   - |
-      gpio@3500 {
+    gpio@3500 {
         compatible = "realtek,rtl8380-gpio", "realtek,otto-gpio";
         reg = <0x3500 0x1c>;
         gpio-controller;
         #interrupt-cells = <2>;
         interrupt-parent = <&rtlintc>;
         interrupts = <23>;
-      };
+    };
   - |
-      gpio@3300 {
+    gpio@3300 {
         compatible = "realtek,rtl9300-gpio", "realtek,otto-gpio";
         reg = <0x3300 0x1c>, <0x3338 0x8>;
         gpio-controller;
         #interrupt-cells = <2>;
         interrupt-parent = <&rtlintc>;
         interrupts = <13>;
-      };
+    };
 
 ...
 
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     gpio0: gpio@e0050000 {
-            compatible = "renesas,em-gio";
-            reg = <0xe0050000 0x2c>, <0xe0050040 0x20>;
-            interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
-                         <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
-            gpio-controller;
-            #gpio-cells = <2>;
-            gpio-ranges = <&pfc 0 0 32>;
-            ngpios = <32>;
-            interrupt-controller;
-            #interrupt-cells = <2>;
+        compatible = "renesas,em-gio";
+        reg = <0xe0050000 0x2c>, <0xe0050040 0x20>;
+        interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&pfc 0 0 32>;
+        ngpios = <32>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
     };
 
     #include <dt-bindings/interrupt-controller/arm-gic.h>
     #include <dt-bindings/power/r8a77470-sysc.h>
     gpio3: gpio@e6053000 {
-            compatible = "renesas,gpio-r8a77470", "renesas,rcar-gen2-gpio";
-            reg = <0xe6053000 0x50>;
-            interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
-            clocks = <&cpg CPG_MOD 909>;
-            power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
-            resets = <&cpg 909>;
-            gpio-controller;
-            #gpio-cells = <2>;
-            gpio-ranges = <&pfc 0 96 30>;
-            gpio-reserved-ranges = <17 10>;
-            interrupt-controller;
-            #interrupt-cells = <2>;
+        compatible = "renesas,gpio-r8a77470", "renesas,rcar-gen2-gpio";
+        reg = <0xe6053000 0x50>;
+        interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cpg CPG_MOD 909>;
+        power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
+        resets = <&cpg 909>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&pfc 0 96 30>;
+        gpio-reserved-ranges = <17 10>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
      };
 
 
 examples:
   - |
-      #include <dt-bindings/clock/sifive-fu540-prci.h>
-      gpio@10060000 {
+    #include <dt-bindings/clock/sifive-fu540-prci.h>
+    gpio@10060000 {
         compatible = "sifive,fu540-c000-gpio", "sifive,gpio0";
         interrupt-parent = <&plic>;
         interrupts = <7>, <8>, <9>, <10>, <11>, <12>, <13>, <14>, <15>, <16>,
         #gpio-cells = <2>;
         interrupt-controller;
         #interrupt-cells = <2>;
-      };
+    };
 
 ...
 
 
 examples:
   - |
-      #include <dt-bindings/interrupt-controller/irq.h>
-      #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
 
-      soc {
+    soc {
         #address-cells = <2>;
         #size-cells = <2>;
 
         gpio: gpio@28020000 {
-          compatible = "toshiba,gpio-tmpv7708";
-          reg = <0 0x28020000 0 0x1000>;
-          #gpio-cells = <0x2>;
-          gpio-ranges = <&pmux 0 0 32>;
-          gpio-controller;
-          interrupt-controller;
-          #interrupt-cells = <2>;
-          interrupt-parent = <&gic>;
+            compatible = "toshiba,gpio-tmpv7708";
+            reg = <0 0x28020000 0 0x1000>;
+            #gpio-cells = <0x2>;
+            gpio-ranges = <&pmux 0 0 32>;
+            gpio-controller;
+            interrupt-controller;
+            #interrupt-cells = <2>;
+            interrupt-parent = <&gic>;
         };
-      };
+    };
 ...
 
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
 
-        gpio@a0020000 {
-            compatible = "xlnx,xps-gpio-1.00.a";
-            reg = <0xa0020000 0x10000>;
-            #gpio-cells = <2>;
-            #interrupt-cells = <0x2>;
-            clocks = <&zynqmp_clk 71>;
-            gpio-controller;
-            interrupt-controller;
-            interrupt-names = "ip2intc_irpt";
-            interrupt-parent = <&gic>;
-            interrupts = <0 89 4>;
-            xlnx,all-inputs = <0x0>;
-            xlnx,all-inputs-2 = <0x0>;
-            xlnx,all-outputs = <0x0>;
-            xlnx,all-outputs-2 = <0x0>;
-            xlnx,dout-default = <0x0>;
-            xlnx,dout-default-2 = <0x0>;
-            xlnx,gpio-width = <0x20>;
-            xlnx,gpio2-width = <0x20>;
-            xlnx,interrupt-present = <0x1>;
-            xlnx,is-dual = <0x1>;
-            xlnx,tri-default = <0xFFFFFFFF>;
-            xlnx,tri-default-2 = <0xFFFFFFFF>;
-        };
+    gpio@a0020000 {
+        compatible = "xlnx,xps-gpio-1.00.a";
+        reg = <0xa0020000 0x10000>;
+        #gpio-cells = <2>;
+        #interrupt-cells = <0x2>;
+        clocks = <&zynqmp_clk 71>;
+        gpio-controller;
+        interrupt-controller;
+        interrupt-names = "ip2intc_irpt";
+        interrupt-parent = <&gic>;
+        interrupts = <0 89 4>;
+        xlnx,all-inputs = <0x0>;
+        xlnx,all-inputs-2 = <0x0>;
+        xlnx,all-outputs = <0x0>;
+        xlnx,all-outputs-2 = <0x0>;
+        xlnx,dout-default = <0x0>;
+        xlnx,dout-default-2 = <0x0>;
+        xlnx,gpio-width = <0x20>;
+        xlnx,gpio2-width = <0x20>;
+        xlnx,interrupt-present = <0x1>;
+        xlnx,is-dual = <0x1>;
+        xlnx,tri-default = <0xFFFFFFFF>;
+        xlnx,tri-default-2 = <0xFFFFFFFF>;
+    };
 
 ...