These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / clock / amlogic,meson8b-clkc.txt

diff --git a/kernel/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt b/kernel/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt
new file mode 100644 (file)
index 0000000..2b7b3fa
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt
@@ -0,0 +1,40 @@
+* Amlogic Meson8b Clock and Reset Unit
+
+The Amlogic Meson8b clock controller generates and supplies clock to various
+controllers within the SoC.
+
+Required Properties:
+
+- compatible: should be "amlogic,meson8b-clkc"
+- reg: it must be composed by two tuples:
+       0) physical base address of the xtal register and length of memory
+          mapped region.
+       1) physical base address of the clock controller and length of memory
+          mapped region.
+
+- #clock-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes can use this identifier
+to specify the clock which they consume. All available clocks are defined as
+preprocessor macros in the dt-bindings/clock/meson8b-clkc.h header and can be
+used in device tree sources.
+
+Example: Clock controller node:
+
+       clkc: clock-controller@c1104000 {
+               #clock-cells = <1>;
+               compatible = "amlogic,meson8b-clkc";
+               reg = <0xc1108000 0x4>, <0xc1104000 0x460>;
+       };
+
+
+Example: UART controller node that consumes the clock generated by the clock
+  controller:
+
+       uart_AO: serial@c81004c0 {
+               compatible = "amlogic,meson-uart";
+               reg = <0xc81004c0 0x14>;
+               interrupts = <0 90 1>;
+               clocks = <&clkc CLKID_CLK81>;
+               status = "disabled";
+       };