3 files changed, 88 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/i2c/mux.txt b/Documentation/devicetree/bindings/i2c/mux.txt
new file mode 100644
index 000000000000..af84cce5cd7b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/mux.txt
@@ -0,0 +1,60 @@
+Common i2c bus multiplexer/switch properties.
+
+An i2c bus multiplexer/switch will have several child busses that are
+numbered uniquely in a device dependent manner.  The nodes for an i2c bus
+multiplexer/switch will have one child node for each child
+bus.
+
+Required properties:
+- #address-cells = <1>;
+- #size-cells = <0>;
+
+Required properties for child nodes:
+- #address-cells = <1>;
+- #size-cells = <0>;
+- reg : The sub-bus number.
+
+Optional properties for child nodes:
+- Other properties specific to the multiplexer/switch hardware.
+- Child nodes conforming to i2c bus binding
+
+
+Example :
+
+        /*
+           An NXP pca9548 8 channel I2C multiplexer at address 0x70
+           with two NXP pca8574 GPIO expanders attached, one each to
+           ports 3 and 4.
+         */
+
+        mux@70 {
+                compatible = "nxp,pca9548";
+                reg = <0x70>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                i2c@3 {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+                        reg = <3>;
+
+                        gpio1: gpio@38 {
+                                compatible = "nxp,pca8574";
+                                reg = <0x38>;
+                                #gpio-cells = <2>;
+                                gpio-controller;
+                        };
+                };
+                i2c@4 {
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+                        reg = <4>;
+
+                        gpio2: gpio@38 {
+                                compatible = "nxp,pca8574";
+                                reg = <0x38>;
+                                #gpio-cells = <2>;
+                                gpio-controller;
+                        };
+                };
+        };
diff --git a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
index 38832c712919..b6cb5a12c672 100644
--- a/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/samsung-i2c.txt
@@ -6,14 +6,18 @@ Required properties:
   - compatible: value should be either of the following.
       (a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
       (b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
+      (c) "samsung, s3c2440-hdmiphy-i2c", for s3c2440-like i2c used
+          inside HDMIPHY block found on several samsung SoCs
   - reg: physical base address of the controller and length of memory mapped
     region.
   - interrupts: interrupt number to the cpu.
   - samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
-  - gpios: The order of the gpios should be the following: <SDA, SCL>.
-    The gpio specifier depends on the gpio controller.
 
 Optional properties:
+  - gpios: The order of the gpios should be the following: <SDA, SCL>.
+    The gpio specifier depends on the gpio controller. Required in all
+    cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output
+    lines are permanently wired to the respective client
   - samsung,i2c-slave-addr: Slave address in multi-master enviroment. If not
     specified, default value is 0.
   - samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
diff --git a/Documentation/devicetree/bindings/i2c/xiic.txt b/Documentation/devicetree/bindings/i2c/xiic.txt
new file mode 100644
index 000000000000..ceabbe91ae44
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/xiic.txt
@@ -0,0 +1,22 @@
+Xilinx IIC controller:
+
+Required properties:
+- compatible : Must be "xlnx,xps-iic-2.00.a"
+- reg : IIC register location and length
+- interrupts : IIC controller unterrupt
+- #address-cells = <1>
+- #size-cells = <0>
+
+Optional properties:
+- Child nodes conforming to i2c bus binding
+
+Example:
+
+        axi_iic_0: i2c@40800000 {
+                compatible = "xlnx,xps-iic-2.00.a";
+                interrupts = < 1 2 >;
+                reg = < 0x40800000 0x10000 >;
+
+                #size-cells = <0>;
+                #address-cells = <1>;
+        };