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Commit 57b7068d authored by Max Filippov's avatar Max Filippov Committed by Mark Brown
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ASoC: add xtensa xtfpga I2S interface and platform 



XTFPGA boards provides an audio subsystem that consists of TI CDCE706
clock synthesizer, I2S transmitter and TLV320AIC23 audio codec.

I2S transmitter has MMIO-based interface that resembles that of the
OpenCores I2S transmitter. I2S transmitter is always a master on I2S
bus. There's no specialized audio DMA, sample data are transferred to
I2S transmitter FIFO by CPU through memory-mapped queue interface.

Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 97bf6af1

Documentation/devicetree/bindings/sound/cdns,xtfpga-i2s.txt

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Bindings for I2S controller built into xtfpga Xtensa bitstreams.



Required properties:

- compatible: shall be "cdns,xtfpga-i2s".

- reg: memory region (address and length) with device registers.

- interrupts: interrupt for the device.

- clocks: phandle to the clk used as master clock. I2S bus clock

  is derived from it.



Examples:



	i2s0: xtfpga-i2s@0d080000 {

		#sound-dai-cells = <0>;

		compatible = "cdns,xtfpga-i2s";

		reg = <0x0d080000 0x40>;

		interrupts = <2 1>;

		clocks = <&cdce706 4>;

	};

MAINTAINERS

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@@ -10628,6 +10628,7 @@ M: Max Filippov <jcmvbkbc@gmail.com> 
L:	linux-xtensa@linux-xtensa.org

S:	Maintained

F:	drivers/spi/spi-xtensa-xtfpga.c

F:	sound/soc/xtensa/xtfpga-i2s.c



YAM DRIVER FOR AX.25

M:	Jean-Paul Roubelat <jpr@f6fbb.org>

sound/soc/Kconfig

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@@ -55,6 +55,7 @@ source "sound/soc/spear/Kconfig" 
source "sound/soc/tegra/Kconfig"

source "sound/soc/txx9/Kconfig"

source "sound/soc/ux500/Kconfig"

source "sound/soc/xtensa/Kconfig"



# Supported codecs

source "sound/soc/codecs/Kconfig"

sound/soc/Makefile

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@@ -36,3 +36,4 @@ obj-$(CONFIG_SND_SOC) += spear/ 
obj-$(CONFIG_SND_SOC)	+= tegra/

obj-$(CONFIG_SND_SOC)	+= txx9/

obj-$(CONFIG_SND_SOC)	+= ux500/

obj-$(CONFIG_SND_SOC)	+= xtensa/

sound/soc/xtensa/Kconfig

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config SND_SOC_XTFPGA_I2S

	tristate "XTFPGA I2S master"

	select REGMAP_MMIO

	help

	  Say Y or M if you want to add support for codecs attached to the

	  I2S interface on XTFPGA daughter board. You will also need to select

	  the drivers for the rest of XTFPGA audio subsystem.