On Mon, Apr 11, 2016 at 01:45:12PM +0200, Petr Kulhavy wrote:
Add devicetree binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx MultiChannel Buffered Serial Port (McBSP)
The optional register range "dat" is not implemented at the moment. The current driver supports only DMA into RX/TX registers but no FIFO. Once the FIFO is implemented in the driver the "dat" range will be used.
Signed-off-by: Petr Kulhavy petr@barix.com
v1: initial v2: add missing TC channel in dmas properties (for compatibility with the new EDMA3 binding) remove "-audio" postfix from the compatible string remove "channel-combine" property
.../devicetree/bindings/sound/davinci-mcbsp.txt | 51 ++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/davinci-mcbsp.txt
diff --git a/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt b/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt new file mode 100644 index 000000000000..de45865c3863 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt @@ -0,0 +1,51 @@ +Texas Instruments DaVinci McBSP module +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This binding describes the "Multi-channel Buffered Serial Port" (McBSP) +audio interface found in some TI DaVinci processors like the OMAP-L138 or AM180x.
+Required properties: +~~~~~~~~~~~~~~~~~~~~ +- compatible : "ti,da850-mcbsp"
You list several SoCs above, but only one compatible string here. A specific compatible string per SoC please.
+- reg : physical base address and length of the controller memory mapped
region(s).+- reg-names : Should contain:
* "mpu" for the main registers (required). For compatibility withexisting software, it is recommended this is the first entry.
s/recommended/required/
* "dat" for the data FIFO (optional).+- dmas: three element list of DMA controller phandles, DMA request line and
- TC channel ordered triplets.
+- dma-names: identifier string for each DMA request line in the dmas property.
- These strings correspond 1:1 with the ordered pairs in dmas. The dma
- identifiers must be "rx" and "tx".
+Optional properties: +~~~~~~~~~~~~~~~~~~~~ +- interrupts : Interrupt numbers for McBSP +- interrupt-names : Known interrupt names are "rx" and "tx"
+- pinctrl-0: Should specify pin control group used for this controller. +- pinctrl-names: Should contain only one value - "default", for more details
please refer to pinctrl-bindings.txt+Example (AM1808): +~~~~~~~~~~~~~~~~~
+mcbsp0: mcbsp@1d10000 {
- compatible = "ti,da850-mcbsp";
- pinctrl-names = "default";
- pinctrl-0 = <&mcbsp0_pins>;
- reg = <0x00110000 0x1000>,
<0x00310000 0x1000>;- reg-names = "mpu", "dat";
- interrupts = <97 98>;
- interrupts-names = "rx", "tx";
- dmas = <&edma0 3 1
&edma0 2 1>;- dma-names = "tx", "rx";
- status = "okay";
+};
1.9.1