linux-sg2042/Documentation/devicetree/bindings/spi/spi-sc18is602.txt

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NXP SC18IS602/SCIS603
Required properties:
- compatible : Should be one of
"nxp,sc18is602"
"nxp,sc18is602b"
"nxp,sc18is603"
- reg: I2C bus address
Optional properties:
- clock-frequency : external oscillator clock frequency. If not
specified, the SC18IS602 default frequency (7372000) will be used.
The clock-frequency property is relevant and needed only if the chip has an
external oscillator (SC18IS603).
Example:
sc18is603@28 {
compatible = "nxp,sc18is603";
reg = <0x28>;
clock-frequency = <14744000>;
}