mirror of
https://github.com/torvalds/linux.git
synced 2024-12-24 20:01:55 +00:00
0bc5680af8
SPDIF need to enable the spba clock, when sdma is using share peripheral script. In this case, there is two spba master port is used, if don't enable the clock, the spba bus will have arbitration issue, which may cause read/write wrong data from/to SPDIF registers. Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com> Acked-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
64 lines
1.9 KiB
Plaintext
64 lines
1.9 KiB
Plaintext
Freescale Sony/Philips Digital Interface Format (S/PDIF) Controller
|
|
|
|
The Freescale S/PDIF audio block is a stereo transceiver that allows the
|
|
processor to receive and transmit digital audio via an coaxial cable or
|
|
a fibre cable.
|
|
|
|
Required properties:
|
|
|
|
- compatible : Compatible list, must contain "fsl,imx35-spdif".
|
|
|
|
- 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 : Two dmas have to be defined, "tx" and "rx".
|
|
|
|
- clocks : Contains an entry for each entry in clock-names.
|
|
|
|
- clock-names : Includes the following entries:
|
|
"core" The core clock of spdif controller.
|
|
"rxtx<0-7>" Clock source list for tx and rx clock.
|
|
This clock list should be identical to the source
|
|
list connecting to the spdif clock mux in "SPDIF
|
|
Transceiver Clock Diagram" of SoC reference manual.
|
|
It can also be referred to TxClk_Source bit of
|
|
register SPDIF_STC.
|
|
"spba" The spba clock is required when SPDIF is placed as a
|
|
bus slave of the Shared Peripheral Bus and when two
|
|
or more bus masters (CPU, DMA or DSP) try to access
|
|
it. This property is optional depending on the SoC
|
|
design.
|
|
|
|
- big-endian : If this property is absent, the native endian mode
|
|
will be in use as default, or the big endian mode
|
|
will be in use for all the device registers.
|
|
|
|
Example:
|
|
|
|
spdif: spdif@02004000 {
|
|
compatible = "fsl,imx35-spdif";
|
|
reg = <0x02004000 0x4000>;
|
|
interrupts = <0 52 0x04>;
|
|
dmas = <&sdma 14 18 0>,
|
|
<&sdma 15 18 0>;
|
|
dma-names = "rx", "tx";
|
|
|
|
clocks = <&clks 197>, <&clks 3>,
|
|
<&clks 197>, <&clks 107>,
|
|
<&clks 0>, <&clks 118>,
|
|
<&clks 62>, <&clks 139>,
|
|
<&clks 0>;
|
|
clock-names = "core", "rxtx0",
|
|
"rxtx1", "rxtx2",
|
|
"rxtx3", "rxtx4",
|
|
"rxtx5", "rxtx6",
|
|
"rxtx7";
|
|
|
|
big-endian;
|
|
status = "okay";
|
|
};
|