Commit 832446e8 authored by Leo Yan's avatar Leo Yan Committed by Michael Turquette
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dt-bindings: clk: Hi6220: Document stub clock driver 



Document the new compatible for stub clock driver which is used for CPU
and DDR's dynamic frequency scaling.

Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent 7e2a51e0

Documentation/devicetree/bindings/clock/hi6220-clock.txt

+18 −1
Original line number Original line Diff line number Diff line
@@ -15,19 +15,36 @@ Required Properties: 
	- "hisilicon,hi6220-sysctrl"

	- "hisilicon,hi6220-sysctrl"

	- "hisilicon,hi6220-mediactrl"

	- "hisilicon,hi6220-mediactrl"

	- "hisilicon,hi6220-pmctrl"

	- "hisilicon,hi6220-pmctrl"

	- "hisilicon,hi6220-stub-clk"





- reg: physical base address of the controller and length of memory mapped

- reg: physical base address of the controller and length of memory mapped

  region.

  region.





- #clock-cells: should be 1.

- #clock-cells: should be 1.





For example:

Optional Properties:



- hisilicon,hi6220-clk-sram: phandle to the syscon managing the SoC internal sram;

  the driver need use the sram to pass parameters for frequency change.



- mboxes: use the label reference for the mailbox as the first parameter, the

  second parameter is the channel number.



Example 1:

	sys_ctrl: sys_ctrl@f7030000 {

	sys_ctrl: sys_ctrl@f7030000 {

		compatible = "hisilicon,hi6220-sysctrl", "syscon";

		compatible = "hisilicon,hi6220-sysctrl", "syscon";

		reg = <0x0 0xf7030000 0x0 0x2000>;

		reg = <0x0 0xf7030000 0x0 0x2000>;

		#clock-cells = <1>;

		#clock-cells = <1>;

	};

	};





Example 2:

	stub_clock: stub_clock {

		compatible = "hisilicon,hi6220-stub-clk";

		hisilicon,hi6220-clk-sram = <&sram>;

		#clock-cells = <1>;

		mboxes = <&mailbox 1>;

	};



Each clock is assigned an identifier and client nodes use this identifier

Each clock is assigned an identifier and client nodes use this identifier

to specify the clock which they consume.

to specify the clock which they consume.