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- Cirrus Logic CS4271 DT bindings
- This driver supports both the I2C and the SPI bus.
- Required properties:
- - compatible: "cirrus,cs4271"
- For required properties on SPI, please consult
- Documentation/devicetree/bindings/spi/spi-bus.txt
- Required properties on I2C:
- - reg: the i2c address
- Optional properties:
- - reset-gpio: a GPIO spec to define which pin is connected to the chip's
- !RESET pin
- - cirrus,amuteb-eq-bmutec: When given, the Codec's AMUTEB=BMUTEC flag
- is enabled.
- - cirrus,enable-soft-reset:
- The CS4271 requires its LRCLK and MCLK to be stable before its RESET
- line is de-asserted. That also means that clocks cannot be changed
- without putting the chip back into hardware reset, which also requires
- a complete re-initialization of all registers.
- One (undocumented) workaround is to assert and de-assert the PDN bit
- in the MODE2 register. This workaround can be enabled with this DT
- property.
- Note that this is not needed in case the clocks are stable
- throughout the entire runtime of the codec.
- - vd-supply: Digital power
- - vl-supply: Logic power
- - va-supply: Analog Power
- Examples:
- codec_i2c: cs4271@10 {
- compatible = "cirrus,cs4271";
- reg = <0x10>;
- reset-gpio = <&gpio 23 0>;
- vd-supply = <&vdd_3v3_reg>;
- vl-supply = <&vdd_3v3_reg>;
- va-supply = <&vdd_3v3_reg>;
- };
- codec_spi: cs4271@0 {
- compatible = "cirrus,cs4271";
- reg = <0x0>;
- reset-gpio = <&gpio 23 0>;
- spi-max-frequency = <6000000>;
- };
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