[PATCH 1/2] dt-bindings: i2c: Add Tegra20 I2C target controller

[Marc Dietrich <marvin24@gmx.de>]

Tegra20 SoCs supports 3 instances of an I2C target controller. They share
ressouces with the I2C controller instances and are introduced here via an
additional compatible.

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
---
 .../bindings/i2c/nvidia,tegra20-i2c.yaml      | 27 ++++++++++++++++---
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
index 51241c1293e3..2d7ee8e8750d 100644
--- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml
@@ -13,11 +13,15 @@ title: NVIDIA Tegra I2C controller driver
 properties:
   compatible:
     oneOf:
-      - description: Tegra20 has 4 generic I2C controller. This can support
-          master and slave mode of I2C communication. The i2c-tegra driver
-          only support master mode of I2C communication. Driver of I2C
-          controller is only compatible with "nvidia,tegra20-i2c".
+      - description: Tegra20 has 3 instances of a generic I2C controller.
+          It supports controller and target mode of I2C communication.
+          The i2c-tegra driver only supports master mode of I2C communication.
+          Driver of I2C controller is only compatible with "nvidia,tegra20-i2c".
         const: nvidia,tegra20-i2c
+      - description: The i2c-tegra-target driver supports the target mode of
+          the generic Tegra20 I2C controller. Driver of the I2C target
+          controller is only compatible with "nvidia,tegra20-i2c-target".
+        const: nvidia,tegra20-i2c-target
       - description: Tegra20 has specific I2C controller called as DVC I2C
           controller. This only support master mode of I2C communication.
           Register interface/offset and interrupts handling are different than
@@ -222,3 +226,18 @@ examples:
         #address-cells = <1>;
         #size-cells = <0>;
     };
+
+  - |
+    i2c@7000c500 {
+        compatible = "nvidia,tegra20-i2c-target";
+        reg = <0x7000c500 0x100>;
+        interrupts = <0 92 0x04>;
+        clocks = <&tegra_car 67>, <&tegra_car 124>;
+        clock-names = "div-clk", "fast-clk";
+        clock-frequency = <80000>;
+        resets = <&tegra_car 67>;
+        reset-names = "i2c";
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
-- 
2.55.0