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ASoC: mchp, i2s-mcc: Add property to specify pin pair for TDM

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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@microchip.com>
Link: https://lore.kernel.org/r/20210301170905.835091-5-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Codrin Ciubotariu
2021-03-01 19:09:02 +02:00
committed by Mark Brown
parent 153bb1feef
commit ead2a3e43f
1 changed files with 6 additions and 1 deletions
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7
Documentation/devicetree/bindings/sound/mchp-i2s-mcc.txt
View File

@@ -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.