projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f04b1e76 TN |
1 | STA32X audio CODEC |
| 2 | ||
| 3 | The driver for this device only supports I2C. | |
| 4 | ||
| 5 | Required properties: | |
| 6 | ||
| 7 | - compatible: "st,sta32x" | |
| 8 | - reg: the I2C address of the device for I2C | |
| 9 | - reset-gpios: a GPIO spec for the reset pin. If specified, it will be | |
| 10 | deasserted before communication to the codec starts. | |
| 11 | ||
| 12 | - power-down-gpios: a GPIO spec for the power down pin. If specified, | |
| 13 | it will be deasserted before communication to the codec | |
| 14 | starts. | |
| 15 | ||
| 16 | - Vdda-supply: regulator spec, providing 3.3V | |
| 17 | - Vdd3-supply: regulator spec, providing 3.3V | |
| 18 | - Vcc-supply: regulator spec, providing 5V - 26V | |
| 19 | ||
| 20 | Optional properties: | |
| 21 | ||
| 22 | - st,output-conf: number, Selects the output configuration: | |
| 23 | 0: 2-channel (full-bridge) power, 2-channel data-out | |
| 24 | 1: 2 (half-bridge). 1 (full-bridge) on-board power | |
| 25 | 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX | |
| 26 | 3: 1 Channel Mono-Parallel | |
| 27 | If parameter is missing, mode 0 will be enabled. | |
| 28 | This property has to be specified as '/bits/ 8' value. | |
| 29 | ||
| 30 | - st,ch1-output-mapping: Channel 1 output mapping | |
| 31 | - st,ch2-output-mapping: Channel 2 output mapping | |
| 32 | - st,ch3-output-mapping: Channel 3 output mapping | |
| 33 | 0: Channel 1 | |
| 34 | 1: Channel 2 | |
| 35 | 2: Channel 3 | |
| 36 | If parameter is missing, channel 1 is chosen. | |
| 37 | This properties have to be specified as '/bits/ 8' values. | |
| 38 | ||
| 39 | - st,thermal-warning-recover: | |
| 40 | If present, thermal warning recovery is enabled. | |
| 41 | ||
| 42 | - st,thermal-warning-adjustment: | |
| 43 | If present, thermal warning adjustment is enabled. | |
| 44 | ||
| 45 | - st,fault-detect-recovery: | |
| 46 | If present, then fault recovery will be enabled. | |
| 47 | ||
| 48 | - st,drop-compensation-ns: number | |
| 49 | Only required for "st,ffx-power-output-mode" == | |
| 50 | "variable-drop-compensation". | |
| 51 | Specifies the drop compensation in nanoseconds. | |
| 52 | The value must be in the range of 0..300, and only | |
| 53 | multiples of 20 are allowed. Default is 140ns. | |
| 54 | ||
| 55 | - st,max-power-use-mpcc: | |
| 56 | If present, then MPCC bits are used for MPC coefficients, | |
| 57 | otherwise standard MPC coefficients are used. | |
| 58 | ||
| 59 | - st,max-power-corr: | |
| 60 | If present, power bridge correction for THD reduction near maximum | |
| 61 | power output is enabled. | |
| 62 | ||
| 63 | - st,am-reduction-mode: | |
| 64 | If present, FFX mode runs in AM reduction mode, otherwise normal | |
| 65 | FFX mode is used. | |
| 66 | ||
| 67 | - st,odd-pwm-speed-mode: | |
| 68 | If present, PWM speed mode run on odd speed mode (341.3 kHz) on all | |
| 69 | channels. If not present, normal PWM spped mode (384 kHz) will be used. | |
| 70 | ||
| 71 | - st,invalid-input-detect-mute: | |
| 72 | If present, automatic invalid input detect mute is enabled. | |
| 73 | ||
| 74 | Example: | |
| 75 | ||
| 76 | codec: sta32x@38 { | |
| 77 | compatible = "st,sta32x"; | |
| 78 | reg = <0x1c>; | |
| 79 | reset-gpios = <&gpio1 19 0>; | |
| 80 | power-down-gpios = <&gpio1 16 0>; | |
| 81 | st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel | |
| 82 | // (full-bridge) power, | |
| 83 | // 2-channel data-out | |
| 84 | st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1 | |
| 85 | st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1 | |
| 86 | st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1 | |
| 87 | st,max-power-correction; // enables power bridge | |
| 88 | // correction for THD reduction | |
| 89 | // near maximum power output | |
| 90 | st,invalid-input-detect-mute; // mute if no valid digital | |
| 91 | // audio signal is provided. | |
| 92 | }; |