Commit ce7344a4 by Nicolin Chen Committed by Mark Brown

ASoC: fsl_sai: Make Synchronous and Asynchronous modes exclusive

The previous patch (ASoC: fsl_sai: Add asynchronous mode support) added new Device Tree bindings for Asynchronous and Synchronous modes support. However, these two shall not be present at the same time. So this patch just simply makes them exclusive so as to avoid incorrect Device Tree binding usage. Signed-off-by: 's avatarNicolin Chen <> Signed-off-by: 's avatarMark Brown <>
parent 08fdf65e
......@@ -38,8 +38,7 @@ Note:
default synchronous mode (sync Rx with Tx) will be used, which means both
transimitter and receiver will send and receive data by following clocks
of transimitter.
- fsl,sai-asynchronous will be ignored if fsl,sai-synchronous-rx property is
already present.
- fsl,sai-asynchronous and fsl,sai-synchronous-rx are exclusive.
sai2: sai@40031000 {
......@@ -634,6 +634,13 @@ static int fsl_sai_probe(struct platform_device *pdev)
fsl_sai_dai.symmetric_channels = 1;
fsl_sai_dai.symmetric_samplebits = 1;
if (of_find_property(np, "fsl,sai-synchronous-rx", NULL) &&
of_find_property(np, "fsl,sai-asynchronous", NULL)) {
/* error out if both synchronous and asynchronous are present */
dev_err(&pdev->dev, "invalid binding for synchronous mode\n");
return -EINVAL;
if (of_find_property(np, "fsl,sai-synchronous-rx", NULL)) {
/* Sync Rx with Tx */
sai->synchronous[RX] = false;
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