clk: samsung: Document binding for Exynos4415 clock controller

This patch adds DT binding documentation for Exynos4415 SoC system
clock controllers.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/exynos4415-clock.txt b/Documentation/devicetree/bindings/clock/exynos4415-clock.txt
new file mode 100644
index 000000000000..847d98bae8cf
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+++ b/Documentation/devicetree/bindings/clock/exynos4415-clock.txt
@@ -0,0 +1,38 @@
+* Samsung Exynos4415 Clock Controller
+
+The Exynos4415 clock controller generates and supplies clock to various
+consumer devices within the Exynos4415 SoC.
+
+Required properties:
+
+- compatible: should be one of the following:
+  - "samsung,exynos4415-cmu" - for the main system clocks controller
+    (CMU_LEFTBUS, CMU_RIGHTBUS, CMU_TOP, CMU_CPU clock domains).
+  - "samsung,exynos4415-cmu-dmc" - for the Exynos4415 SoC DRAM Memory
+    Controller (DMC) domain clock controller.
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume.
+
+All available clocks are defined as preprocessor macros in
+dt-bindings/clock/exynos4415.h header and can be used in device
+tree sources.
+
+Example 1: An example of a clock controller node is listed below.
+
+        cmu: clock-controller@10030000 {
+                compatible = "samsung,exynos4415-cmu";
+                reg = <0x10030000 0x18000>;
+                #clock-cells = <1>;
+        };
+
+        cmu-dmc: clock-controller@105C0000 {
+                compatible = "samsung,exynos4415-cmu-dmc";
+                reg = <0x105C0000 0x3000>;
+                #clock-cells = <1>;
+        };