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[v2,1/2] dt-bindings: ASoC: Add Spreadtrum multi-channel data transfer support

Message ID fd223d1dcf5be1f83863e881fa3db931b5c84601.1555917711.git.baolin.wang@linaro.org
State Accepted
Commit c634d3ffc6b2c3b15ea79ffe0a761ce08b4da71a
Headers show
Series [v2,1/2] dt-bindings: ASoC: Add Spreadtrum multi-channel data transfer support | expand

Commit Message

(Exiting) Baolin Wang April 23, 2019, 2:26 a.m. UTC 
On Spreadtrum platform, the audio subsystem will use the multi-channel
data transfer controller to transfer sound stream between audio subsystem
and other AP/CP subsystem.

It can support 10 DAC channel and 10 ADC channel, and each channel has
512 bytes depth data fifo. Moreover each channel can be used DMA mode
or interrupt mode to transfer data.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>

---
Changes from v1:
 - Move the documentation into sound/.
---
 .../devicetree/bindings/sound/sprd-mcdt.txt        |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/sprd-mcdt.txt

-- 
1.7.9.5
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Patch

diff --git a/Documentation/devicetree/bindings/sound/sprd-mcdt.txt b/Documentation/devicetree/bindings/sound/sprd-mcdt.txt
new file mode 100644
index 0000000..274ba0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sprd-mcdt.txt
@@ -0,0 +1,19 @@ 
+Spreadtrum Multi-Channel Data Transfer Binding
+
+The Multi-channel data transfer controller is used for sound stream
+transmission between audio subsystem and other AP/CP subsystem. It
+supports 10 DAC channel and 10 ADC channel, and each channel can be
+configured with DMA mode or interrupt mode.
+
+Required properties:
+- compatible: Should be "sprd,sc9860-mcdt".
+- reg: Should contain registers address and length.
+- interrupts: Should contain one interrupt shared by all channel.
+
+Example:
+
+mcdt@41490000 {
+	compatible = "sprd,sc9860-mcdt";
+	reg = <0 0x41490000 0 0x170>;
+	interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+};