From 42d5031d3ee858bc14df704439eefdbf38b8f628 Mon Sep 17 00:00:00 2001 From: Dan Murphy Date: Tue, 15 Sep 2020 14:06:04 -0500 Subject: [PATCH] ASoC: tlv320adcx140: Add the config to configure Tx ASI output Add code to allow the ASI Tx output to be placed into High-z mode during unused ASI cycles. This allows for other devices that may be on the bus to drive the ASI out. By default the 320adcx140 sends 0's for unused cycles. Signed-off-by: Dan Murphy Link: https://lore.kernel.org/r/20200915190606.1744-4-dmurphy@ti.com Signed-off-by: Mark Brown --- sound/soc/codecs/tlv320adcx140.c | 11 +++++++++++ sound/soc/codecs/tlv320adcx140.h | 1 + 2 files changed, 12 insertions(+) diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c index cf5cbe314f7e..28dbd7d5e149 100644 --- a/sound/soc/codecs/tlv320adcx140.c +++ b/sound/soc/codecs/tlv320adcx140.c @@ -876,6 +876,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component) u32 gpi_input_val = 0; int i; int ret; + bool tx_high_z; ret = device_property_read_u32(adcx140->dev, "ti,mic-bias-source", &bias_source); @@ -967,6 +968,16 @@ static int adcx140_codec_probe(struct snd_soc_component *component) if (ret) dev_err(adcx140->dev, "setting MIC bias failed %d\n", ret); + tx_high_z = device_property_read_bool(adcx140->dev, "ti,asi-tx-drive"); + if (tx_high_z) { + ret = regmap_update_bits(adcx140->regmap, ADCX140_ASI_CFG0, + ADCX140_TX_FILL, ADCX140_TX_FILL); + if (ret) { + dev_err(adcx140->dev, "Setting Tx drive failed %d\n", ret); + goto out; + } + } + adcx140_pwr_ctrl(adcx140, true); out: return ret; diff --git a/sound/soc/codecs/tlv320adcx140.h b/sound/soc/codecs/tlv320adcx140.h index 94c6d1fd2977..107bd7927d9c 100644 --- a/sound/soc/codecs/tlv320adcx140.h +++ b/sound/soc/codecs/tlv320adcx140.h @@ -146,5 +146,6 @@ #define ADCX140_GPO_CFG_MAX 4 #define ADCX140_GPO_DRV_MAX 5 +#define ADCX140_TX_FILL BIT(0) #endif /* _TLV320ADCX140_ */