@@ -15,19 +15,36 @@ Required Properties:
- "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.
-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 {
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.
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> --- .../devicetree/bindings/clock/hi6220-clock.txt | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)