[PATCH 1/2] ASoC: atmel-i2s: add DT bindings for I2S controller

Cyrille Pitchen
2015-09-28T15:05:53Z

This patch adds DT bindings for the new Atmel I2S controller embedded
inside sama5d2x SoCs.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
---
.../devicetree/bindings/sound/atmel-i2s.txt | 43 ++++++++++++++++++++++
1 file changed, 43 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 000000000000..83bc6b9070bf
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/atmel-i2s.txt
@@ -0,0 +1,43 @@
+* 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 a list of pairs of DMA controller phandle and flags.
+- dma-names: Should be a list of DMA channel name among "rx", "tx" or
+ "rx-tx".
+- clocks: Should be a list of phandles of clocks used by the controller
+ (1).
+- clock-names: Should be a list matching the clocks phandles list:
+ - "pclk" (peripheral clock) Required.
+ - "gclk" (generated clock) Optional (1).
+ - "aclk" (Audio PLL 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 and the Audio
+ PLL clock are optional and should only be set together.
+
+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>;
+ clock-names = "pclk", "gclk", "aclk";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_i2s0_default>;
+ };
--
1.8.2.2