2 files changed, 49 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/gpio/gpio-samsung.txt b/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
index 5375625e8cd2..f1e5dfecf55d 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-samsung.txt
@@ -39,3 +39,46 @@ Example:
                 #gpio-cells = <4>;
                 gpio-controller;
         };
+
+
+Samsung S3C24XX GPIO Controller
+
+Required properties:
+- compatible: Compatible property value should be "samsung,s3c24xx-gpio".
+
+- reg: Physical base address of the controller and length of memory mapped
+  region.
+
+- #gpio-cells: Should be 3. The syntax of the gpio specifier used by client nodes
+  should be the following with values derived from the SoC user manual.
+     <[phandle of the gpio controller node]
+      [pin number within the gpio controller]
+      [mux function]
+      [flags and pull up/down]
+
+  Values for gpio specifier:
+  - Pin number: depending on the controller a number from 0 up to 15.
+  - Mux function: Depending on the SoC and the gpio bank the gpio can be set
+                  as input, output or a special function
+  - Flags and Pull Up/Down: the values to use differ for the individual SoCs
+                    example S3C2416/S3C2450:
+                            0 - Pull Up/Down Disabled.
+                            1 - Pull Down Enabled.
+                            2 - Pull Up Enabled.
+          Bit 16 (0x00010000) - Input is active low.
+  Consult the user manual for the correct values of Mux and Pull Up/Down.
+
+- gpio-controller: Specifies that the node is a gpio controller.
+- #address-cells: should be 1.
+- #size-cells: should be 1.
+
+Example:
+
+        gpa: gpio-controller@56000000 {
+                #address-cells = <1>;
+                #size-cells = <1>;
+                compatible = "samsung,s3c24xx-gpio";
+                reg = <0x56000000 0x10>;
+                #gpio-cells = <3>;
+                gpio-controller;
+        };
diff --git a/Documentation/devicetree/bindings/gpio/gpio-twl4030.txt b/Documentation/devicetree/bindings/gpio/gpio-twl4030.txt
index 16695d9cf1e8..66788fda1db3 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-twl4030.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-twl4030.txt
@@ -11,6 +11,11 @@ Required properties:
 - interrupt-controller: Mark the device node as an interrupt controller
   The first cell is the GPIO number.
   The second cell is not used.
+- ti,use-leds : Enables LEDA and LEDB outputs if set
+- ti,debounce : if n-th bit is set, debounces GPIO-n
+- ti,mmc-cd : if n-th bit is set, GPIO-n controls VMMC(n+1)
+- ti,pullups : if n-th bit is set, set a pullup on GPIO-n
+- ti,pulldowns : if n-th bit is set, set a pulldown on GPIO-n
 
 Example:
 
@@ -20,4 +25,5 @@ twl_gpio: gpio {
     gpio-controller;
     #interrupt-cells = <2>;
     interrupt-controller;
+    ti,use-leds;
 };