diff --git a/include/sound/tlv320aic32x4.h b/include/sound/tlv320aic32x4.h index c009f70b40293a70fa4b54afeb8fb4b879cac449..24e5d991f148be2d8b16cc309e1af7dca5f5f14b 100644 --- a/include/sound/tlv320aic32x4.h +++ b/include/sound/tlv320aic32x4.h @@ -26,6 +26,7 @@ struct aic32x4_pdata { u32 power_cfg; u32 micpga_routing; bool swapdacs; + int rstn_gpio; }; #endif diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c index f230292ba96bbfc0c5cf7c7264dd4435de3d7590..e39e08d5d8e42429b8b2cb27bf1b08104a65454f 100644 --- a/sound/soc/codecs/tlv320aic32x4.c +++ b/sound/soc/codecs/tlv320aic32x4.c @@ -28,6 +28,7 @@ #include #include #include +#include #include #include #include @@ -65,6 +66,7 @@ struct aic32x4_priv { u32 power_cfg; u32 micpga_routing; bool swapdacs; + int rstn_gpio; }; /* 0dB min, 1dB steps */ @@ -627,10 +629,20 @@ static int aic32x4_probe(struct snd_soc_codec *codec) { struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec); u32 tmp_reg; + int ret; codec->hw_write = (hw_write_t) i2c_master_send; codec->control_data = aic32x4->control_data; + if (aic32x4->rstn_gpio >= 0) { + ret = devm_gpio_request_one(codec->dev, aic32x4->rstn_gpio, + GPIOF_OUT_INIT_LOW, "tlv320aic32x4 rstn"); + if (ret != 0) + return ret; + ndelay(10); + gpio_set_value(aic32x4->rstn_gpio, 1); + } + snd_soc_write(codec, AIC32X4_RESET, 0x01); /* Power platform configuration */ @@ -675,6 +687,16 @@ static int aic32x4_probe(struct snd_soc_codec *codec) ARRAY_SIZE(aic32x4_snd_controls)); aic32x4_add_widgets(codec); + /* + * Workaround: for an unknown reason, the ADC needs to be powered up + * and down for the first capture to work properly. It seems related to + * a HW BUG or some kind of behavior not documented in the datasheet. + */ + tmp_reg = snd_soc_read(codec, AIC32X4_ADCSETUP); + snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg | + AIC32X4_LADC_EN | AIC32X4_RADC_EN); + snd_soc_write(codec, AIC32X4_ADCSETUP, tmp_reg); + return 0; } @@ -713,10 +735,12 @@ static __devinit int aic32x4_i2c_probe(struct i2c_client *i2c, aic32x4->power_cfg = pdata->power_cfg; aic32x4->swapdacs = pdata->swapdacs; aic32x4->micpga_routing = pdata->micpga_routing; + aic32x4->rstn_gpio = pdata->rstn_gpio; } else { aic32x4->power_cfg = 0; aic32x4->swapdacs = false; aic32x4->micpga_routing = 0; + aic32x4->rstn_gpio = -1; } ret = snd_soc_register_codec(&i2c->dev, diff --git a/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h index aae2b2440398aaac19a62eac62b6e7788e41035c..35774223fd91f2a03c4ce4ed56c45df3f3ff2a3d 100644 --- a/sound/soc/codecs/tlv320aic32x4.h +++ b/sound/soc/codecs/tlv320aic32x4.h @@ -94,6 +94,9 @@ #define AIC32X4_WORD_LEN_24BITS 0x02 #define AIC32X4_WORD_LEN_32BITS 0x03 +#define AIC32X4_LADC_EN (1 << 7) +#define AIC32X4_RADC_EN (1 << 6) + #define AIC32X4_I2S_MODE 0x00 #define AIC32X4_DSP_MODE 0x01 #define AIC32X4_RIGHT_JUSTIFIED_MODE 0x02