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Tue, 15 Sep 2020 14:06:29 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 08FJ6Tiq102549; Tue, 15 Sep 2020 14:06:29 -0500 From: Dan Murphy To: , , , Subject: [PATCH 4/6] ASoC: tlv320adcx140: Add the config to configure Tx ASI output Date: Tue, 15 Sep 2020 14:06:04 -0500 Message-ID: <20200915190606.1744-4-dmurphy@ti.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200915190606.1744-1-dmurphy@ti.com> References: <20200915190606.1744-1-dmurphy@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Cc: devicetree@vger.kernel.org, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Dan Murphy , camel.guo@axis.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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 --- 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 73d18e8002e4..7fa5c8682c51 100644 --- a/sound/soc/codecs/tlv320adcx140.c +++ b/sound/soc/codecs/tlv320adcx140.c @@ -839,6 +839,7 @@ 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); @@ -930,6 +931,16 @@ 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_ */