The Mediatek AFE PCM controller for MT8192 allows two I2S interfaces to share the same clock and act as a single interface with both input and output. Add patterns for these properties in the dt-binding. The property is split into two patterns in order to allow all valid interface pairings. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx> --- The series from v1 of this patch was merged although some changes were still needed in this patch, so the v1 of this patch was reverted [1] and this standalone commit addresses the feedback from v1 and readds the property. [1] https://lore.kernel.org/all/20220509185625.580811-1-nfraprado@xxxxxxxxxxxxx v1: https://lore.kernel.org/all/20220429203039.2207848-2-nfraprado@xxxxxxxxxxxxx/ Changes in v2: - Added "mediatek," prefix to property - Rewrote and added more information to property description - Split into two patterns to validate that output-input pairings are done .../bindings/sound/mt8192-afe-pcm.yaml | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml b/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml index 7a25bc9b8060..2abf43c6c2c3 100644 --- a/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml +++ b/Documentation/devicetree/bindings/sound/mt8192-afe-pcm.yaml @@ -54,6 +54,22 @@ properties: - const: aud_infra_clk - const: aud_infra_26m_clk +patternProperties: + "^mediatek,i2s[13579]-share$": + description: + Each I2S interface has a single data line, input if its index is even or + output if the index is odd. An input and an output I2S interface can be + used together as if they were a single I2S interface with both input and + output data lines by sharing the same clock. This property represents this + pairing. The value should be the name of the interface whose clock is + used, and the property name the other interface that depends on this + clock. + pattern: "^I2S[0268]$" + + "^mediatek,i2s[0268]-share$": + description: Same as above. + pattern: "^I2S[13579]$" + required: - compatible - interrupts -- 2.36.0
