1STA32X audio CODEC 2 3The driver for this device only supports I2C. 4 5Required 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 20Optional properties: 21 22 - clocks, clock-names: Clock specifier for XTI input clock. 23 If specified, the clock will be enabled when the codec is probed, 24 and disabled when it is removed. The 'clock-names' must be set to 'xti'. 25 26 - st,output-conf: number, Selects the output configuration: 27 0: 2-channel (full-bridge) power, 2-channel data-out 28 1: 2 (half-bridge). 1 (full-bridge) on-board power 29 2: 2 Channel (Full-Bridge) Power, 1 Channel FFX 30 3: 1 Channel Mono-Parallel 31 If parameter is missing, mode 0 will be enabled. 32 This property has to be specified as '/bits/ 8' value. 33 34 - st,ch1-output-mapping: Channel 1 output mapping 35 - st,ch2-output-mapping: Channel 2 output mapping 36 - st,ch3-output-mapping: Channel 3 output mapping 37 0: Channel 1 38 1: Channel 2 39 2: Channel 3 40 If parameter is missing, channel 1 is chosen. 41 This properties have to be specified as '/bits/ 8' values. 42 43 - st,thermal-warning-recover: 44 If present, thermal warning recovery is enabled. 45 46 - st,fault-detect-recovery: 47 If present, fault detect recovery is enabled. 48 49 - st,thermal-warning-adjustment: 50 If present, thermal warning adjustment is enabled. 51 52 - st,fault-detect-recovery: 53 If present, then fault recovery will be enabled. 54 55 - st,drop-compensation-ns: number 56 Only required for "st,ffx-power-output-mode" == 57 "variable-drop-compensation". 58 Specifies the drop compensation in nanoseconds. 59 The value must be in the range of 0..300, and only 60 multiples of 20 are allowed. Default is 140ns. 61 62 - st,max-power-use-mpcc: 63 If present, then MPCC bits are used for MPC coefficients, 64 otherwise standard MPC coefficients are used. 65 66 - st,max-power-corr: 67 If present, power bridge correction for THD reduction near maximum 68 power output is enabled. 69 70 - st,am-reduction-mode: 71 If present, FFX mode runs in AM reduction mode, otherwise normal 72 FFX mode is used. 73 74 - st,odd-pwm-speed-mode: 75 If present, PWM speed mode run on odd speed mode (341.3 kHz) on all 76 channels. If not present, normal PWM spped mode (384 kHz) will be used. 77 78 - st,invalid-input-detect-mute: 79 If present, automatic invalid input detect mute is enabled. 80 81Example: 82 83codec: sta32x@38 { 84 compatible = "st,sta32x"; 85 reg = <0x1c>; 86 clocks = <&clock>; 87 clock-names = "xti"; 88 reset-gpios = <&gpio1 19 0>; 89 power-down-gpios = <&gpio1 16 0>; 90 st,output-conf = /bits/ 8 <0x3>; // set output to 2-channel 91 // (full-bridge) power, 92 // 2-channel data-out 93 st,ch1-output-mapping = /bits/ 8 <0>; // set channel 1 output ch 1 94 st,ch2-output-mapping = /bits/ 8 <0>; // set channel 2 output ch 1 95 st,ch3-output-mapping = /bits/ 8 <0>; // set channel 3 output ch 1 96 st,max-power-correction; // enables power bridge 97 // correction for THD reduction 98 // near maximum power output 99 st,invalid-input-detect-mute; // mute if no valid digital 100 // audio signal is provided. 101}; 102