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The property used to specify a GPIO intended for reset is "reset-gpios", but this binding uses "gpio-reset". It is not compatible with newer methods used to fetch GPIO pins and to prevent the spread of this error to other bindings let's rename to be more standard. We also standardize the pin as active-low, different device trees have marked the GPIO different ways, luckily the driver currently uses the low-level GPIO set function which does not respect the active-low flag, but future changes may change this. This is an active-low reset, mark it as such. Lastly, add an example of use for this property. [Rewrote the title & first paragraph of the commit message for clarity -- broonie] Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Mark Brown <broonie@kernel.org>
73 lines
2.3 KiB
Plaintext
73 lines
2.3 KiB
Plaintext
Texas Instruments - tlv320aic31xx Codec module
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The tlv320aic31xx serial control bus communicates through I2C protocols
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Required properties:
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- compatible - "string" - One of:
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"ti,tlv320aic310x" - Generic TLV320AIC31xx with mono speaker amp
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"ti,tlv320aic311x" - Generic TLV320AIC31xx with stereo speaker amp
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"ti,tlv320aic3100" - TLV320AIC3100 (mono speaker amp, no MiniDSP)
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"ti,tlv320aic3110" - TLV320AIC3110 (stereo speaker amp, no MiniDSP)
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"ti,tlv320aic3120" - TLV320AIC3120 (mono speaker amp, MiniDSP)
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"ti,tlv320aic3111" - TLV320AIC3111 (stereo speaker amp, MiniDSP)
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"ti,tlv320dac3100" - TLV320DAC3100 (no ADC, mono speaker amp, no MiniDSP)
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"ti,tlv320dac3101" - TLV320DAC3101 (no ADC, stereo speaker amp, no MiniDSP)
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- reg - <int> - I2C slave address
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- HPVDD-supply, SPRVDD-supply, SPLVDD-supply, AVDD-supply, IOVDD-supply,
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DVDD-supply : power supplies for the device as covered in
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Documentation/devicetree/bindings/regulator/regulator.txt
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Optional properties:
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- reset-gpios - GPIO specification for the active low RESET input.
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- ai31xx-micbias-vg - MicBias Voltage setting
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1 or MICBIAS_2_0V - MICBIAS output is powered to 2.0V
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2 or MICBIAS_2_5V - MICBIAS output is powered to 2.5V
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3 or MICBIAS_AVDD - MICBIAS output is connected to AVDD
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If this node is not mentioned or if the value is unknown, then
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micbias is set to 2.0V.
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Deprecated properties:
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- gpio-reset - gpio pin number used for codec reset
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CODEC output pins:
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* HPL
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* HPR
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* SPL, devices with stereo speaker amp
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* SPR, devices with stereo speaker amp
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* SPK, devices with mono speaker amp
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* MICBIAS
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CODEC input pins:
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* MIC1LP, devices with ADC
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* MIC1RP, devices with ADC
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* MIC1LM, devices with ADC
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* AIN1, devices without ADC
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* AIN2, devices without ADC
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The pins can be used in referring sound node's audio-routing property.
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Example:
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/sound/tlv320aic31xx-micbias.h>
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tlv320aic31xx: tlv320aic31xx@18 {
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compatible = "ti,tlv320aic311x";
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reg = <0x18>;
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ai31xx-micbias-vg = <MICBIAS_OFF>;
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reset-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
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HPVDD-supply = <®ulator>;
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SPRVDD-supply = <®ulator>;
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SPLVDD-supply = <®ulator>;
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AVDD-supply = <®ulator>;
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IOVDD-supply = <®ulator>;
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DVDD-supply = <®ulator>;
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};
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