hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Leo Yan 2015-08-04 15:27:27 +08:00 committed by Michael Turquette
parent 7e2a51e0cf
commit 832446e8aa
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Documentation/devicetree/bindings/clock/hi6220-clock.txt
View File

@ -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.