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* Hisilicon Hi6220 Clock Controller
Clock control registers reside in different Hi6220 system controllers,
please refer the following document to know more about the binding rules
for these system controllers:
Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
Required Properties:
- compatible: the compatible should be one of the following strings to
indicate the clock controller functionality.
- "hisilicon,hi6220-aoctrl"
- "hisilicon,hi6220-sysctrl"
- "hisilicon,hi6220-mediactrl"
- "hisilicon,hi6220-pmctrl"
- "hisilicon,hi6220-stub-clk"
- reg: physical base address of the controller and length of memory mapped
region.
- #clock-cells: should be 1.
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 {
compatible = "hisilicon,hi6220-sysctrl", "syscon";
reg = <0x0 0xf7030000 0x0 0x2000>;
#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
to specify the clock which they consume.
All these identifier could be found in <dt-bindings/clock/hi6220-clock.h>.
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