- 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”;
};
