42 lines
1.2 KiB
Plaintext
Executable file
42 lines
1.2 KiB
Plaintext
Executable file
* Clock bindings for Axis ARTPEC-6 chip
|
|
|
|
The bindings are based on the clock provider binding in
|
|
Documentation/devicetree/bindings/clock/clock-bindings.txt
|
|
|
|
External clocks:
|
|
----------------
|
|
|
|
There are two external inputs to the main clock controller which should be
|
|
provided using the common clock bindings.
|
|
- "sys_refclk": External 50 Mhz oscillator (required)
|
|
- "i2s_refclk": Alternate audio reference clock (optional).
|
|
|
|
Main clock controller
|
|
---------------------
|
|
|
|
Required properties:
|
|
- #clock-cells: Should be <1>
|
|
See dt-bindings/clock/axis,artpec6-clkctrl.h for the list of valid identifiers.
|
|
- compatible: Should be "axis,artpec6-clkctrl"
|
|
- reg: Must contain the base address and length of the system controller
|
|
- clocks: Must contain a phandle entry for each clock in clock-names
|
|
- clock-names: Must include the external oscillator ("sys_refclk"). Optional
|
|
ones are the audio reference clock ("i2s_refclk") and the audio fractional
|
|
dividers ("frac_clk0" and "frac_clk1").
|
|
|
|
Examples:
|
|
|
|
ext_clk: ext_clk {
|
|
#clock-cells = <0>;
|
|
compatible = "fixed-clock";
|
|
clock-frequency = <50000000>;
|
|
};
|
|
|
|
clkctrl: clkctrl@f8000000 {
|
|
#clock-cells = <1>;
|
|
compatible = "axis,artpec6-clkctrl";
|
|
reg = <0xf8000000 0x48>;
|
|
clocks = <&ext_clk>;
|
|
clock-names = "sys_refclk";
|
|
};
|