From: Cyrille Pitchen <cyrille.pitchen@xxxxxxxxx>
This patch adds DT bindings for the new Atmel I2S controller embedded
inside sama5d2x SoCs.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@xxxxxxxxx>
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@xxxxxxxxxxxxx>
---
Changes in v4:
- more specific description for dmas, dma-names, clocks, clock-names
properties;
- removed SoC and internal details of the block IP;
- added description for the new clock mux phandle;
.../devicetree/bindings/sound/atmel-i2s.txt | 47 ++++++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/atmel-i2s.txt
diff --git a/Documentation/devicetree/bindings/sound/atmel-i2s.txt b/Documentation/devicetree/bindings/sound/atmel-i2s.txt
new file mode 100644
index 0000000..735368b
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/atmel-i2s.txt
@@ -0,0 +1,47 @@
+* Atmel I2S controller
+
+Required properties:
+- compatible: Should be "atmel,sama5d2-i2s".
+- reg: Should be the physical base address of the controller and the
+ length of memory mapped region.
+- interrupts: Should contain the interrupt for the controller.
+- dmas: Should be one per channel name listed in the dma-names property,
+ as described in atmel-dma.txt and dma.txt files.
+- dma-names: Two dmas have to be defined, "tx" and "rx".
+ This IP also supports one shared channel for both rx and tx;
+ if this mode is used, one "rx-tx" name must be used.
+- clocks: Must contain an entry for each entry in clock-names.
+ Please refer to clock-bindings.txt.
+- clock-names: Should be one of each entry matching the clocks phandles list:
+ - "pclk" (peripheral clock) Required.
+ - "gclk" (generated clock) Optional (1).
+ - "aclk" (Audio PLL clock) Optional (1).
+ - "muxclk" (I2S mux clock) Optional (1).
+
+Optional properties:
+- pinctrl-0: Should specify pin control groups used for this controller.
+- princtrl-names: Should contain only one value - "default".
+
+
+(1) : Only the peripheral clock is required. The generated clock, the Audio
+ PLL clock adn the I2S mux clock are optional and should only be set
+ together, when Master Mode is required.
+
+Example:
+
+ i2s@f8050000 {
+ compatible = "atmel,sama5d2-i2s";
+ reg = <0xf8050000 0x300>;
+ interrupts = <54 IRQ_TYPE_LEVEL_HIGH 7>;
+ dmas = <&dma0
+ (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
+ AT91_XDMAC_DT_PERID(31))>,
+ <&dma0
+ (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) |
+ AT91_XDMAC_DT_PERID(32))>;
+ dma-names = "tx", "rx";
+ clocks = <&i2s0_clk>, <&i2s0_gclk>, <&audio_pll_pmc>, <&i2s0muxck>;
+ clock-names = "pclk", "gclk", "aclk", "muxclk";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2s0_default>;
+ };
--
2.7.4
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