The Exynos4415 clocks are statically listed and registered using the Samsung specific common clock helper functions. Both device tree based clock lookup and clkdev based clock lookups are supported. Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Cc: Tomasz Figa <tomasz.figa@xxxxxxxxx> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- .../devicetree/bindings/clock/exynos4415-clock.txt | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/exynos4415-clock.txt diff --git a/Documentation/devicetree/bindings/clock/exynos4415-clock.txt b/Documentation/devicetree/bindings/clock/exynos4415-clock.txt new file mode 100644 index 0000000..8aa4f4f --- /dev/null +++ b/Documentation/devicetree/bindings/clock/exynos4415-clock.txt @@ -0,0 +1,49 @@ +* Samsung Exynos4415 Clock Controller + +The Exynos4415 clock controller generates and supplies clock to various +controllers within the Exynos4415 SoC. + +Required Properties: + +- compatible: should be one of the following. + - "samsung,exynos4415-cmu" - controller compatible with Exynos4415 SoC. + - "samsung,exynos4415-cmu-dmc" - controller compatible with + Exynos4415 SoC for Dynamic Memory Controller domain. + +- 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>; + }; + +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_0: serial@13800000 { + compatible = "samsung,exynos4210-uart"; + reg = <0x13800000 0x100>; + interrupts = <0 109 0>; + clocks = <&cmu CLK_UART0>, <&cmu CLK_SCLK_UART0>; + clock-names = "uart", "clk_uart_baud0"; + }; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html