diff options
Diffstat (limited to 'Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml new file mode 100644 index 0000000000..bfef2fcb75 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/fsl,imx-asrc.yaml @@ -0,0 +1,162 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/fsl,imx-asrc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale Asynchronous Sample Rate Converter (ASRC) Controller + +description: + The Asynchronous Sample Rate Converter (ASRC) converts the sampling rate of + a signal associated with an input clock into a signal associated with a + different output clock. The driver currently works as a Front End of DPCM + with other Back Ends Audio controller such as ESAI, SSI and SAI. It has + three pairs to support three substreams within totally 10 channels. + +maintainers: + - Shawn Guo <shawnguo@kernel.org> + - Sascha Hauer <s.hauer@pengutronix.de> + +properties: + compatible: + oneOf: + - enum: + - fsl,imx35-asrc + - fsl,imx53-asrc + - fsl,imx8qm-asrc + - fsl,imx8qxp-asrc + - items: + - enum: + - fsl,imx6sx-asrc + - fsl,imx6ul-asrc + - const: fsl,imx53-asrc + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + dmas: + maxItems: 6 + + dma-names: + items: + - const: rxa + - const: rxb + - const: rxc + - const: txa + - const: txb + - const: txc + + clocks: + maxItems: 19 + + clock-names: + items: + - const: mem + - const: ipg + - const: asrck_0 + - const: asrck_1 + - const: asrck_2 + - const: asrck_3 + - const: asrck_4 + - const: asrck_5 + - const: asrck_6 + - const: asrck_7 + - const: asrck_8 + - const: asrck_9 + - const: asrck_a + - const: asrck_b + - const: asrck_c + - const: asrck_d + - const: asrck_e + - const: asrck_f + - const: spba + + fsl,asrc-rate: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The mutual sample rate used by DPCM Back Ends + + fsl,asrc-width: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The mutual sample width used by DPCM Back Ends + enum: [16, 24] + + fsl,asrc-clk-map: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Defines clock map used in driver + <0> - select the map for asrc0 in imx8qm/imx8qxp + <1> - select the map for asrc1 in imx8qm/imx8qxp + enum: [0, 1] + + big-endian: + type: boolean + description: + If this property is absent, the little endian mode will be in use as + default. Otherwise, the big endian mode will be in use for all the + device registers. + + fsl,asrc-format: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Defines a mutual sample format used by DPCM Back Ends, which can + replace the fsl,asrc-width. The value is 2 (S16_LE), or 6 (S24_LE). + enum: [2, 6] + +required: + - compatible + - reg + - interrupts + - dmas + - dma-names + - clocks + - clock-names + - fsl,asrc-rate + - fsl,asrc-width + +allOf: + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8qm-asrc + - fsl,imx8qxp-asrc + then: + required: + - fsl,asrc-clk-map + else: + properties: + fsl,asrc-clk-map: false + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/clock/imx6qdl-clock.h> + asrc: asrc@2034000 { + compatible = "fsl,imx53-asrc"; + reg = <0x02034000 0x4000>; + interrupts = <0 50 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clks IMX6QDL_CLK_ASRC_IPG>, + <&clks IMX6QDL_CLK_ASRC_MEM>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks 0>, <&clks 0>, <&clks 0>, <&clks 0>, + <&clks IMX6QDL_CLK_ASRC>, <&clks 0>, <&clks 0>, + <&clks IMX6QDL_CLK_SPBA>; + clock-names = "mem", "ipg", "asrck_0", + "asrck_1", "asrck_2", "asrck_3", "asrck_4", + "asrck_5", "asrck_6", "asrck_7", "asrck_8", + "asrck_9", "asrck_a", "asrck_b", "asrck_c", + "asrck_d", "asrck_e", "asrck_f", "spba"; + dmas = <&sdma 17 23 1>, <&sdma 18 23 1>, <&sdma 19 23 1>, + <&sdma 20 23 1>, <&sdma 21 23 1>, <&sdma 22 23 1>; + dma-names = "rxa", "rxb", "rxc", + "txa", "txb", "txc"; + fsl,asrc-rate = <48000>; + fsl,asrc-width = <16>; + }; |