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authorLeo Yan <leo.yan@linaro.org>2015-08-04 10:27:27 +0300
committerMichael Turquette <mturquette@baylibre.com>2015-08-25 02:49:10 +0300
commit832446e8aaaeaf9365da18f95f01a42e6da27279 (patch)
treeda685b387de462dc2394f60a7ac80a5b5ff699e0
parent7e2a51e0cf75028888e5c670b3a3963e1716bdff (diff)
downloadlinux-832446e8aaaeaf9365da18f95f01a42e6da27279.tar.xz
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>
-rw-r--r--Documentation/devicetree/bindings/clock/hi6220-clock.txt19
1 files changed, 18 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/clock/hi6220-clock.txt b/Documentation/devicetree/bindings/clock/hi6220-clock.txt
index 259e30af9597..e4d5feaebc29 100644
--- a/Documentation/devicetree/bindings/clock/hi6220-clock.txt
+++ b/Documentation/devicetree/bindings/clock/hi6220-clock.txt
@@ -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.