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Commit eb632318 authored by Jean-Francois Moine's avatar Jean-Francois Moine Committed by Mark Brown
Browse files

ASoc: kirkwood: add DT support to the mvebu audio subsystem 



This patch adds DT support to the audio subsystem of the mvebu family
(Kirkwood, Dove, Armada 370).

Signed-off-by: default avatarJean-Francois Moine <moinejf@free.fr>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent e4065f3f

Documentation/devicetree/bindings/sound/mvebu-audio.txt

0 → 100644
+29 −0
Original line number Diff line number Diff line 
* mvebu (Kirkwood, Dove, Armada 370) audio controller



Required properties:



- compatible: "marvell,mvebu-audio"



- reg: physical base address of the controller and length of memory mapped

  region.



- interrupts: list of two irq numbers.

  The first irq is used for data flow and the second one is used for errors.



- clocks: one or two phandles.

  The first one is mandatory and defines the internal clock.

  The second one is optional and defines an external clock.



- clock-names: names associated to the clocks:

	"internal" for the internal clock

	"extclk" for the external clock



Example:



i2s1: audio-controller@b4000 {

	compatible = "marvell,mvebu-audio";

	reg = <0xb4000 0x2210>;

	interrupts = <21>, <22>;

	clocks = <&gate_clk 13>;

	clock-names = "internal";

};

sound/soc/kirkwood/kirkwood-i2s.c

+20 −6
Original line number Diff line number Diff line
@@ -22,6 +22,8 @@ 
#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <linux/platform_data/asoc-kirkwood.h>

#include <linux/of.h>



#include "kirkwood.h"



#define DRV_NAME	"mvebu-audio"
@@ -453,6 +455,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) 
	struct snd_soc_dai_driver *soc_dai = &kirkwood_i2s_dai;

	struct kirkwood_dma_data *priv;

	struct resource *mem;

	struct device_node *np = pdev->dev.of_node;

	int err;



	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
@@ -473,14 +476,16 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) 
		return -ENXIO;

	}



	if (!data) {

		dev_err(&pdev->dev, "no platform data ?!\n");

	if (np) {

		priv->burst = 128;		/* might be 32 or 128 */

	} else if (data) {

		priv->burst = data->burst;

	} else {

		dev_err(&pdev->dev, "no DT nor platform data ?!\n");

		return -EINVAL;

	}



	priv->burst = data->burst;



	priv->clk = devm_clk_get(&pdev->dev, NULL);

	priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);

	if (IS_ERR(priv->clk)) {

		dev_err(&pdev->dev, "no clock\n");

		return PTR_ERR(priv->clk);
@@ -507,7 +512,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) 
	priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;



	/* Select the burst size */

	if (data->burst == 32) {

	if (priv->burst == 32) {

		priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;

		priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;

	} else {
@@ -552,12 +557,21 @@ static int kirkwood_i2s_dev_remove(struct platform_device *pdev) 
	return 0;

}



#ifdef CONFIG_OF

static struct of_device_id mvebu_audio_of_match[] = {

	{ .compatible = "marvell,mvebu-audio" },

	{ }

};

MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);

#endif



static struct platform_driver kirkwood_i2s_driver = {

	.probe  = kirkwood_i2s_dev_probe,

	.remove = kirkwood_i2s_dev_remove,

	.driver = {

		.name = DRV_NAME,

		.owner = THIS_MODULE,

		.of_match_table = of_match_ptr(mvebu_audio_of_match),

	},

};