[PATCH 1/2] ASoC: cygnus-audio: adding device tree bindings
From: Scott Branden <sbranden@broadcom.com>
Date: 2015-03-31 03:16:40
Also in:
alsa-devel, linux-arm-kernel, lkml
Subsystem:
open firmware and flattened device tree bindings, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Liam Girdwood, Mark Brown, Linus Torvalds
From: Lori Hikichi <redacted> Add device tree binding documentation for the Cygnus SOC audio block Reviewed-by: Jonathan Richardson <redacted> Reviewed-by: Ray Jui <rjui@broadcom.com> Signed-off-by: Scott Branden <sbranden@broadcom.com> Signed-off-by: Lori Hikichi <redacted> --- .../bindings/sound/brcm,cygnus-audio.txt | 68 ++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt
diff --git a/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt b/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt
new file mode 100644
index 0000000..5358cc3
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/brcm,cygnus-audio.txt@@ -0,0 +1,68 @@ +BROADCOM Cygnus Audio I2S/TDM/SPDIF controller + +Required properties: + - compatible : "brcm,cygnus-audio" + - #address-cells: 32bit valued, 1 cell. <1> + - #size-cells: 32bit valued, 1 cell. <1> + - reg : Should contain audio registers location and length + - interrupts: audio DMA interrupt number + +SSP Subnode properties: +- dai-name: The name of the DAI registered with ASOC +- ssp-port-id: The ssp port interface to use + Valid value are 0, 1, 2, or 3 (for spdif) +- mode: Controls if this port should be configured as I2S or TDM mode. + Valid values are: "tdm" or "i2s" +- tdm-bits-per-frame: only if mode is "tdm" then this property must set. + Valid values are (128/256/512) +- port-status: Controls if port is enabled or not + Valid values "enabled" or "disabled" +- channel-group: Control grouping of serial port + Valid values are "2_0", "3_1", or "5_1" + +Example: + cygnus_audio: audio@0x180ae000 { + compatible = "brcm,cygnus-audio"; + #address-cells = <1>; + #size-cells = <1>; + reg = <0x180ae000 0x1000>; + + interrupts = <GIC_SPI 143 IRQ_TYPE_LEVEL_HIGH>; + + ssp0: ssp_port@0 { + dai-name = "cygnus-ssp0"; + ssp-port-id = <0>; + + mode = "i2s"; /* "i2s" or "tdm" */ + channel-group = "2_0"; /* Use 2_0, 3_1, 5_1 */ + port-status = "enabled"; + }; + + ssp1: ssp_port@1 { + dai-name = "cygnus-ssp1"; + ssp-port-id = <1>; + + mode = "i2s"; /* "i2s" or "tdm" */ + channel-group = "2_0"; /* Use 2_0, 3_1, 5_1 */ + port-status = "disabled"; + }; + + ssp2: ssp_port@2 { + dai-name = "cygnus-ssp2"; + ssp-port-id = <2>; + + mode = "tdm"; /* "i2s" or "tdm" */ + tdm-bits-per-frame = <256>; + channel-group = "2_0"; /* Use 2_0, 3_1, 5_1 */ + port-status = "disabled"; + }; + + spdif: spdif_port@3 { + dai-name = "cygnus-spdif"; + ssp-port-id = <3>; + + mode = "i2s"; /* "i2s" or "tdm" */ + channel-group = "2_0"; /* Use 2_0, 3_1, 5_1 */ + port-status = "disabled"; + }; + };
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2.3.3