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nxp: sai: add support for passing TX/RX data line through DTS

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Some SAI instances are mutliline, meaning they can have multiple
TX/RX data lines (channels). Depending on the board, the index
of the TX/RX data lines that are connected to the consumer
(e.g: the codec) may not always be 0. This commit fixes this
issue by adding support for passing the index of the used
TX/RX data lines through the DTS.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
This commit is contained in:
Laurentiu Mihalcea 2024-03-15 13:31:11 +02:00 • committed by Carles Cufí
commit 0ff402657b
3 changed files with 64 additions and 7 deletions
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25
dts/bindings/dai/nxp,dai-sai.yaml
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@ -84,3 +84,28 @@ properties:
If this property is not specified, the receiver will be set to ASYNC.
If one side is SYNC then the other MUST be ASYNC. Failing to meet this
condition will result in a failed BUILD_ASSERT().
tx-dataline:
type: int
description: |
Use this property to specify which transmission data line the SAI should
use. To find out which transmission line you should use you can:
1) Check the TRM and see if your SAI instance is multiline. If not then
you're going to use transmission line 0.
2) If your SAI is multiline then you need to check the datasheet and see
the index of the transmission line that's connected to your consumer
(e.g: the codec).
The indexing of the data line starts at 0. If this property is not specified
then the index of the transmission data line will be 0.
Please note that "channel" and "data line" are synnonyms in this context.
rx-dataline:
type: int
description: |
Use this property to specify which receive transmission data line the SAI should
use. To find out which receive line you should use you can:
1) Check the TRM and see if your SAI instance is multiline. If not then
you're going to use receive line 0.
2) If your SAI is multiline then you need to check the datasheet and see
the index of the receive line that's connected to your consumer (e.g: the codec).
The indexing of the data line starts at 0. If this property is not specified
then the index of the receive data line will be 0.
Please note that "channel" and "data line" are synnonyms in this context.