linux-kernel - [PATCH v2 4/7] dt-bindings: mchp,i2s-mcc: Add property to specify pin pair for TDM

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Message-ID: <20210301170905.835091-5-codrin.ciubotariu@microchip.com>
Date:   Mon, 1 Mar 2021 19:09:02 +0200
From:   Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
To:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
        <perex@...ex.cz>, <tiwai@...e.com>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>,
        "Codrin Ciubotariu" <codrin.ciubotariu@...rochip.com>
Subject: [PATCH v2 4/7] dt-bindings: mchp,i2s-mcc: Add property to specify pin pair for TDM

SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a
single pair of pins for synchronous capture and playback, the controller
needs to be told which of the pair is connected. This can be mentioned
using the new "microchip,tdm-data-pair" property. The property is optional,
needed only if TDM is used, and if it's missing DIN/DOUT 0 pins will be
used by default.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
---

Changes in v2:
- changes are done to mchp-i2s-mcc.txt insted of mchp,i2s-mcc.yaml

 Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt b/Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt
index 2180dbd9ea81..af8fe3e657df 100644
--- a/Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt
+++ b/Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt
@@ -19,7 +19,12 @@ Required properties:
 Optional properties:
 - pinctrl-0:      Should specify pin control groups used for this controller.
 - princtrl-names: Should contain only one value - "default".
-
+- microchip,tdm-data-pair: 8 bit value that represents the DIN/DOUT pair pins
+			   which are used to receive/send TDM data. It is optional
+			   and it is only needed if the controller uses the TDM
+			   mode. Not available for "microchip,sam9x60-i2smcc"
+			   compatible. If it's not present, the default value is 0,
+			   so the DIN/DOUT 0 pins are used.
 
 (1) : Only the peripheral clock is required. The generated clock is optional
       and should be set mostly when Master Mode is required.
-- 
2.27.0