Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / clock / exynos4-clock.txt

diff --git a/kernel/Documentation/devicetree/bindings/clock/exynos4-clock.txt b/kernel/Documentation/devicetree/bindings/clock/exynos4-clock.txt
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+* Samsung Exynos4 Clock Controller
+
+The Exynos4 clock controller generates and supplies clock to various controllers
+within the Exynos4 SoC. The clock binding described here is applicable to all
+SoC's in the Exynos4 family.
+
+Required Properties:
+
+- compatible: should be one of the following.
+  - "samsung,exynos4210-clock" - controller compatible with Exynos4210 SoC.
+  - "samsung,exynos4412-clock" - controller compatible with Exynos4412 SoC.
+
+- 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/exynos4.h header and can be used in device
+tree sources.
+
+Example 1: An example of a clock controller node is listed below.
+
+       clock: clock-controller@0x10030000 {
+               compatible = "samsung,exynos4210-clock";
+               reg = <0x10030000 0x20000>;
+               #clock-cells = <1>;
+       };
+
+Example 2: UART controller node that consumes the clock generated by the clock
+          controller. Refer to the standard clock bindings for information
+          about 'clocks' and 'clock-names' property.
+
+       serial@13820000 {
+               compatible = "samsung,exynos4210-uart";
+               reg = <0x13820000 0x100>;
+               interrupts = <0 54 0>;
+               clocks = <&clock CLK_UART2>, <&clock CLK_SCLK_UART2>;
+               clock-names = "uart", "clk_uart_baud0";
+       };