From 19b0fa11bb1c0c24296c9f670a37c091bd3c815d Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Thu, 31 Aug 2017 11:49:47 +0300 Subject: ASoC: tlv320aic3x: Support for OCMV configuration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In aic3x class of devices Output Common-Mode Voltage can be configured for better analog performance. The OCMV value depends on the Analog and digital domain power supply voltage configuration. The default OCMV of 1.35V gives best performance when AVDD is around 2.7V and DVDD is 1.525V, but for higher AVDD/DVDD higher OCMV setting is recommended. The patch gives an automatic way of guessing the best OCMV which can be overwritten by a DT parameter if needed. Signed-off-by: Peter Ujfalusi Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/sound/tlv320aic3x.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/devicetree/bindings/sound') diff --git a/Documentation/devicetree/bindings/sound/tlv320aic3x.txt b/Documentation/devicetree/bindings/sound/tlv320aic3x.txt index 47a213c411ce..ba5b45c483f5 100644 --- a/Documentation/devicetree/bindings/sound/tlv320aic3x.txt +++ b/Documentation/devicetree/bindings/sound/tlv320aic3x.txt @@ -26,6 +26,11 @@ Optional properties: 3 - MICBIAS output is connected to AVDD, If this node is not mentioned or if the value is incorrect, then MicBias is powered down. +- ai3x-ocmv - Output Common-Mode Voltage selection: + 0 - 1.35V, + 1 - 1.5V, + 2 - 1.65V, + 3 - 1.8V - AVDD-supply, IOVDD-supply, DRVDD-supply, DVDD-supply : power supplies for the device as covered in Documentation/devicetree/bindings/regulator/regulator.txt -- cgit v1.2.1