Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / sound / fsl,asrc.txt

diff --git a/kernel/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/kernel/Documentation/devicetree/bindings/sound/fsl,asrc.txt
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+Freescale Asynchronous Sample Rate Converter (ASRC) Controller
+
+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.
+
+Required properties:
+
+  - compatible         : Contains "fsl,imx35-asrc" or "fsl,imx53-asrc".
+
+  - reg                        : Offset and length of the register set for the device.
+
+  - interrupts         : Contains the spdif interrupt.
+
+  - dmas               : Generic dma devicetree binding as described in
+                         Documentation/devicetree/bindings/dma/dma.txt.
+
+  - dma-names          : Contains "rxa", "rxb", "rxc", "txa", "txb" and "txc".
+
+  - clocks             : Contains an entry for each entry in clock-names.
+
+  - clock-names                : Contains the following entries
+       "mem"             Peripheral access clock to access registers.
+       "ipg"             Peripheral clock to driver module.
+       "asrck_<0-f>"     Clock sources for input and output clock.
+
+   - big-endian                : 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-rate     : Defines a mutual sample rate used by DPCM Back Ends.
+
+   - fsl,asrc-width    : Defines a mutual sample width used by DPCM Back Ends.
+
+Example:
+
+asrc: asrc@02034000 {
+       compatible = "fsl,imx53-asrc";
+       reg = <0x02034000 0x4000>;
+       interrupts = <0 50 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&clks 107>, <&clks 107>, <&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 107>, <&clks 0>, <&clks 0>;
+       clock-names = "mem", "ipg", "asrck0",
+               "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";
+       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>;
+       status = "okay";
+};