mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 12:52:30 +00:00
0507cb0226
Add documentation of device tree bindings for the STM32 SPDIFRX interface. Signed-off-by: olivier moysan <olivier.moysan@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>
57 lines
1.5 KiB
Plaintext
57 lines
1.5 KiB
Plaintext
STMicroelectronics STM32 S/PDIF receiver (SPDIFRX).
|
|
|
|
The SPDIFRX peripheral, is designed to receive an S/PDIF flow compliant with
|
|
IEC-60958 and IEC-61937.
|
|
|
|
Required properties:
|
|
- compatible: should be "st,stm32h7-spdifrx"
|
|
- reg: cpu DAI IP base address and size
|
|
- clocks: must contain an entry for kclk (used as S/PDIF signal reference)
|
|
- clock-names: must contain "kclk"
|
|
- interrupts: cpu DAI interrupt line
|
|
- dmas: DMA specifiers for audio data DMA and iec control flow DMA
|
|
See STM32 DMA bindings, Documentation/devicetree/bindings/dma/stm32-dma.txt
|
|
- dma-names: two dmas have to be defined, "rx" and "rx-ctrl"
|
|
|
|
Optional properties:
|
|
- resets: Reference to a reset controller asserting the SPDIFRX
|
|
|
|
The device node should contain one 'port' child node with one child 'endpoint'
|
|
node, according to the bindings defined in Documentation/devicetree/bindings/
|
|
graph.txt.
|
|
|
|
Example:
|
|
spdifrx: spdifrx@40004000 {
|
|
compatible = "st,stm32h7-spdifrx";
|
|
reg = <0x40004000 0x400>;
|
|
clocks = <&rcc SPDIFRX_CK>;
|
|
clock-names = "kclk";
|
|
interrupts = <97>;
|
|
dmas = <&dmamux1 2 93 0x400 0x0>,
|
|
<&dmamux1 3 94 0x400 0x0>;
|
|
dma-names = "rx", "rx-ctrl";
|
|
pinctrl-0 = <&spdifrx_pins>;
|
|
pinctrl-names = "default";
|
|
|
|
spdifrx_port: port {
|
|
cpu_endpoint: endpoint {
|
|
remote-endpoint = <&codec_endpoint>;
|
|
};
|
|
};
|
|
};
|
|
|
|
spdif_in: spdif-in {
|
|
compatible = "linux,spdif-dir";
|
|
|
|
codec_port: port {
|
|
codec_endpoint: endpoint {
|
|
remote-endpoint = <&cpu_endpoint>;
|
|
};
|
|
};
|
|
};
|
|
|
|
soundcard {
|
|
compatible = "audio-graph-card";
|
|
dais = <&spdifrx_port>;
|
|
};
|