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diff --git a/Documentation/devicetree/bindings/clock/silabs,si5324.txt b/Documentation/devicetree/bindings/clock/silabs,si5324.txt new file mode 100644 index 000000000000..642af113aa6e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/silabs,si5324.txt @@ -0,0 +1,78 @@ +Binding for Silicon Labs si5324, si5328 and si5319 programmable +I2C clock generator. + +Reference +This binding uses the common clock binding[1]. +The si5324 is programmable i2c low-bandwidth, jitter-attenuating, precision +clock multiplier with up to 2 output clocks. The internal structure can be +found in [2]. +The internal pin structure of si5328 and si5319 can be found in [3]. + +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt +[2] Si5324 Data Sheet + http://www.silabs.com/Support%20Documents/TechnicalDocs/Si5324.pdf +[3] Si53xx Reference Manual + http://www.silabs.com/Support%20Documents/TechnicalDocs/ + Si53xxReferenceManual.pdf + +==I2C device node== + +Required properties: +- compatible: should be one of + "silabs,si5324" + "silabs,si5319" + "silabs,si5328" +- reg: i2c device address. +- #clock-cells: from common clock binding; shall be set to 1. +- clocks: from common clock binding; list of parent clock + handles, clock name should be one of + "xtal" + "clkin1" + "clkin2" +- #address-cells: shall be set to 1. +- #size-cells: shall be set to 0. + +Optional properties: +- silabs,pll-source: pair of (number, source) for each pll. Allows + to overwrite clock source of pll. + +==Child nodes== + +Each of the clock outputs can be overwritten individually by +using a child node to the I2C device node. If a child node for a clock +output is not set, the eeprom configuration is not overwritten. + +Required child node properties: +- reg: number of clock output. +- clock-frequency: default output frequency at power on + +Optional child node properties: +- silabs,drive-strength: output drive strength in mA, shall be one of {2,4,6,8}. + +Example: +Following example describes the ZCU102 board with hdmi design which +uses si5319 as clock generator. XTAL is hard-wired on the board to act +as input clock with a frequency of 114.285MHz. + +refhdmi: refhdmi { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <114285000>; +}; + +/* Si5319 i2c clock generator */ +si5319: clock-generator@68 { + status = "okay"; + compatible = "silabs,si5319"; + reg = <0x68>; + #address-cells = <1>; + #size-cells = <0>; + #clock-cells = <1>; + clocks = <&refhdmi>; + clock-names = "xtal"; + + clk0 { + reg = <0>; + clock-frequency = <27000000>; + }; +}; |