| Brian Austin | 3bb4061 | 2014-05-05 15:09:09 -0500 | [diff] [blame] | 1 | CS42L52 audio CODEC |
| 2 | |
| 3 | Required properties: |
| 4 | |
| 5 | - compatible : "cirrus,cs42l56" |
| 6 | |
| 7 | - reg : the I2C address of the device for I2C |
| 8 | |
| 9 | - VA-supply, VCP-supply, VLDO-supply : power supplies for the device, |
| 10 | as covered in Documentation/devicetree/bindings/regulator/regulator.txt. |
| 11 | |
| 12 | Optional properties: |
| 13 | |
| 14 | - cirrus,gpio-nreset : GPIO controller's phandle and the number |
| 15 | of the GPIO used to reset the codec. |
| 16 | |
| 17 | - cirrus,chgfreq-divisor : Values used to set the Charge Pump Frequency. |
| 18 | Allowable values of 0x00 through 0x0F. These are raw values written to the |
| 19 | register, not the actual frequency. The frequency is determined by the following. |
| 20 | Frequency = MCLK / 4 * (N+2) |
| 21 | N = chgfreq_val |
| 22 | MCLK = Where MCLK is the frequency of the mclk signal after the MCLKDIV2 circuit. |
| 23 | |
| 24 | - cirrus,ain1a-ref-cfg, ain1b-ref-cfg : boolean, If present, AIN1A or AIN1B are configured |
| 25 | as a pseudo-differential input referenced to AIN1REF/AIN3A. |
| 26 | |
| 27 | - cirrus,ain2a-ref-cfg, ain2b-ref-cfg : boolean, If present, AIN2A or AIN2B are configured |
| 28 | as a pseudo-differential input referenced to AIN2REF/AIN3B. |
| 29 | |
| 30 | - cirrus,micbias-lvl: Set the output voltage level on the MICBIAS Pin. |
| 31 | 0 = 0.5 x VA |
| 32 | 1 = 0.6 x VA |
| 33 | 2 = 0.7 x VA |
| 34 | 3 = 0.8 x VA |
| 35 | 4 = 0.83 x VA |
| 36 | 5 = 0.91 x VA |
| 37 | |
| 38 | - cirrus,adaptive-pwr-cfg : Configures how the power to the Headphone and Lineout |
| 39 | Amplifiers adapt to the output signal levels. |
| 40 | 0 = Adapt to Volume Mode. Voltage level determined by the sum of the relevant volume settings. |
| 41 | 1 = Fixed - Headphone and Line Amp supply = + or - VCP/2. |
| 42 | 2 = Fixed - Headphone and Line Amp supply = + or - VCP. |
| 43 | 3 = Adapted to Signal; Voltage level is dynamically determined by the output signal. |
| 44 | |
| 45 | - cirrus,hpf-left-freq, hpf-right-freq : Sets the corner frequency (-3dB point) for the internal High-Pass |
| 46 | Filter. |
| 47 | 0 = 1.8Hz |
| 48 | 1 = 119Hz |
| 49 | 2 = 236Hz |
| 50 | 3 = 464Hz |
| 51 | |
| 52 | |
| 53 | Example: |
| 54 | |
| 55 | codec: codec@4b { |
| 56 | compatible = "cirrus,cs42l56"; |
| 57 | reg = <0x4b>; |
| 58 | gpio-reset = <&gpio 10 0>; |
| 59 | cirrus,chgfreq-divisor = <0x05>; |
| 60 | cirrus.ain1_ref_cfg; |
| 61 | cirrus,micbias-lvl = <5>; |
| 62 | VA-supply = <®_audio>; |
| 63 | }; |