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

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

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Jean-Francois Moine 2013-08-14 12:27:33 +02:00 committed by Mark Brown
parent e4065f3ff1
commit eb63231830
2 changed files with 49 additions and 6 deletions
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29
Documentation/devicetree/bindings/sound/mvebu-audio.txt Normal file
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@ -0,0 +1,29 @@
* 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";
};

26
sound/soc/kirkwood/kirkwood-i2s.c
View File

@ -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),
},
};