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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>;
};
};
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