diff options
author | Max Filippov <jcmvbkbc@gmail.com> | 2014-12-26 12:19:38 -0500 |
---|---|---|
committer | Mark Brown <broonie@kernel.org> | 2015-01-08 14:52:11 -0500 |
commit | 57b7068de5d0cca8ac6e21085b843c1bbd49d3f4 (patch) | |
tree | 7f967c6eada43604a8dd30e88141f70bbc4e91b5 /Documentation/devicetree/bindings/sound | |
parent | 97bf6af1f928216fd6c5a66e8a57bfa95a659672 (diff) |
ASoC: add xtensa xtfpga I2S interface and platform
XTFPGA boards provides an audio subsystem that consists of TI CDCE706
clock synthesizer, I2S transmitter and TLV320AIC23 audio codec.
I2S transmitter has MMIO-based interface that resembles that of the
OpenCores I2S transmitter. I2S transmitter is always a master on I2S
bus. There's no specialized audio DMA, sample data are transferred to
I2S transmitter FIFO by CPU through memory-mapped queue interface.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/sound')
-rw-r--r-- | Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt b/Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt new file mode 100644 index 000000000000..befd125d18bb --- /dev/null +++ b/Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt | |||
@@ -0,0 +1,18 @@ | |||
1 | Bindings for I2S controller built into xtfpga Xtensa bitstreams. | ||
2 | |||
3 | Required properties: | ||
4 | - compatible: shall be "cdns,xtfpga-i2s". | ||
5 | - reg: memory region (address and length) with device registers. | ||
6 | - interrupts: interrupt for the device. | ||
7 | - clocks: phandle to the clk used as master clock. I2S bus clock | ||
8 | is derived from it. | ||
9 | |||
10 | Examples: | ||
11 | |||
12 | i2s0: xtfpga-i2s@0d080000 { | ||
13 | #sound-dai-cells = <0>; | ||
14 | compatible = "cdns,xtfpga-i2s"; | ||
15 | reg = <0x0d080000 0x40>; | ||
16 | interrupts = <2 1>; | ||
17 | clocks = <&cdce706 4>; | ||
18 | }; | ||