60 lines
1.5 KiB
Plaintext
60 lines
1.5 KiB
Plaintext
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Devicetree bindings for Maxim MAX9485 Programmable Audio Clock Generator
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This device exposes 4 clocks in total:
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- MAX9485_MCLKOUT: A gated, buffered output of the input clock of 27 MHz
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- MAX9485_CLKOUT: A PLL that can be configured to 16 different discrete
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frequencies
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- MAX9485_CLKOUT[1,2]: Two gated outputs for MAX9485_CLKOUT
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MAX9485_CLKOUT[1,2] are children of MAX9485_CLKOUT which upchain all rate set
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requests.
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Required properties:
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- compatible: "maxim,max9485"
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- clocks: Input clock, must provice 27.000 MHz
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- clock-names: Must be set to "xclk"
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- #clock-cells: From common clock binding; shall be set to 1
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Optional properties:
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- reset-gpios: GPIO descriptor connected to the #RESET input pin
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- vdd-supply: A regulator node for Vdd
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- clock-output-names: Name of output clocks, as defined in common clock
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bindings
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If not explicitly set, the output names are "mclkout", "clkout", "clkout1"
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and "clkout2".
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Clocks are defined as preprocessor macros in the dt-binding header.
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Example:
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#include <dt-bindings/clock/maxim,max9485.h>
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xo-27mhz: xo-27mhz {
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compatible = "fixed-clock";
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#clock-cells = <0>;
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clock-frequency = <27000000>;
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};
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&i2c0 {
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max9485: audio-clock@63 {
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reg = <0x63>;
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compatible = "maxim,max9485";
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clock-names = "xclk";
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clocks = <&xo-27mhz>;
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reset-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
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vdd-supply = <&3v3-reg>;
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#clock-cells = <1>;
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};
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};
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// Clock consumer node
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foo@0 {
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compatible = "bar,foo";
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/* ... */
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clock-names = "foo-input-clk";
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clocks = <&max9485 MAX9485_CLKOUT1>;
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};
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