On May 5, 2014, at 4:32 PM, Austin, Brian brian.austin@cirrus.com wrote:
On May 5, 2014, at 4:18 PM, Kumar Gala galak@codeaurora.org wrote:
On May 5, 2014, at 3:09 PM, Brian Austin brian.austin@cirrus.com wrote:
This patch adds binding documentation for the Cirrus Logic CS42L56 Low Power Stereo I2C CODEC
Signed-off-by: Brian Austin brian.austin@cirrus.com
.../devicetree/bindings/sound/cs42l56.txt | 63 ++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/cs42l56.txt
diff --git a/Documentation/devicetree/bindings/sound/cs42l56.txt b/Documentation/devicetree/bindings/sound/cs42l56.txt new file mode 100644 index 0000000..9ae074f --- /dev/null +++ b/Documentation/devicetree/bindings/sound/cs42l56.txt @@ -0,0 +1,63 @@ +CS42L52 audio CODEC
+Required properties:
- compatible : "cirrus,cs42l56"
- reg : the I2C address of the device for I2C
- VA-supply, VCP-supply, VLDO-supply : power supplies for the device,
- as covered in Documentation/devicetree/bindings/regulator/regulator.txt.
+Optional properties:
- cirrus,gpio-nreset : GPIO controller's phandle and the number
- of the GPIO used to reset the codec.
- cirrus,chgfreq-divisor : Values used to set the Charge Pump Frequency.
- Allowable values of 0x00 through 0x0F. These are raw values written to the
- register, not the actual frequency. The frequency is determined by the following.
- Frequency = MCLK / 4 * (N+2)
- N = chgfreq_val
- MCLK = Where MCLK is the frequency of the mclk signal after the MCLKDIV2 circuit.
- cirrus,ain1a-ref-cfg, ain1b-ref-cfg : boolean, If present, AIN1A or AIN1B are configured
- as a pseudo-differential input referenced to AIN1REF/AIN3A.
What happens if a DT had both bools?
That would not cause any issues, but you can only tie the ref to one of the inputs
- cirrus,ain2a-ref-cfg, ain2b-ref-cfg : boolean, If present, AIN2A or AIN2B are configured
- as a pseudo-differential input referenced to AIN2REF/AIN3B.
- cirrus,micbias-lvl: Set the output voltage level on the MICBIAS Pin.
- 0 = 0.5 x VA
- 1 = 0.6 x VA
- 2 = 0.7 x VA
- 3 = 0.8 x VA
- 4 = 0.83 x VA
- 5 = 0.91 x VA
- cirrus,adaptive-pwr-cfg : Configures how the power to the Headphone and Lineout
- Amplifiers adapt to the output signal levels.
- 0 = Adapt to Volume Mode. Voltage level determined by the sum of the relevant volume settings.
- 1 = Fixed - Headphone and Line Amp supply = + or - VCP/2.
- 2 = Fixed - Headphone and Line Amp supply = + or - VCP.
- 3 = Adapted to Signal; Voltage level is dynamically determined by the output signal.
- cirrus,hpf-left-freq, hpf-right-freq : Sets the corner frequency (-3dB point) for the internal High-Pass
- Filter.
- 0 = 1.8Hz
- 1 = 119Hz
- 2 = 236Hz
- 3 = 464Hz
Add a include/dt-bindings for all the various enums
Could you explain more please?
Thanks
I understand now thanks