linux-kernel - [PATCH 1/2] bindings: sound: davinci-mcasp: Add support for optional auxclk-fs-ratio

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Date:   Tue, 11 Jun 2019 15:29:40 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     <broonie@...nel.org>, <lgirdwood@...il.com>
CC:     <alsa-devel@...a-project.org>, <misael.lopez@...com>,
        <jsarha@...com>, <devicetree@...r.kernel.org>,
        <robh+dt@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] bindings: sound: davinci-mcasp: Add support for optional auxclk-fs-ratio

When McASP is bus master it's reference clock (AUXCLK) might not be a
static clock, but running at a specific FS ratio.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
---
 .../devicetree/bindings/sound/davinci-mcasp-audio.txt          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
index a58f79f5345c..c483dcec01f8 100644
--- a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -44,6 +44,9 @@ Optional properties:
   		 please refer to pinctrl-bindings.txt
 - fck_parent : Should contain a valid clock name which will be used as parent
 	       for the McASP fck
+- auxclk-fs-ratio: When McASP is bus master indicates the ratio between AUCLK
+		   and FS rate if applicable:
+		   AUCLK rate = auxclk-fs-ratio * FS rate
 
 Optional GPIO support:
 If any McASP pin need to be used as GPIO then the McASP node must have:
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
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