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ASoC: pxa: pxa-ssp: add DT bindings

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The pxa ssp DAI acts as a user of a pxa ssp port, and needs an
appropriate 'port' phandle in DT to reference the upstream.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Daniel Mack 2013-08-12 10:42:38 +02:00 committed by Mark Brown
parent 4210606b19
commit 2023c90c3a
2 changed files with 59 additions and 6 deletions
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28
Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt Normal file
View File

@ -0,0 +1,28 @@
Marvell PXA SSP CPU DAI bindings
Required properties:
compatible Must be "mrvl,pxa-ssp-dai"
port A phandle reference to a PXA ssp upstream device
Example:
/* upstream device */
ssp0: ssp@41000000 {
compatible = "mrvl,pxa3xx-ssp";
reg = <0x41000000 0x40>;
interrupts = <24>;
clock-names = "pxa27x-ssp.0";
dmas = <&dma 13
&dma 14>;
dma-names = "rx", "tx";
};
/* DAI as user */
ssp_dai0: ssp_dai@0 {
compatible = "mrvl,pxa-ssp-dai";
port = <&ssp0>;
};

37
sound/soc/pxa/pxa-ssp.c
View File

@ -21,6 +21,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/pxa2xx_ssp.h>
#include <linux/of.h>
#include <asm/irq.h>
@ -719,6 +720,7 @@ static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
static int pxa_ssp_probe(struct snd_soc_dai *dai)
{
struct device *dev = dai->dev;
struct ssp_priv *priv;
int ret;
@ -726,10 +728,26 @@ static int pxa_ssp_probe(struct snd_soc_dai *dai)
if (!priv)
return -ENOMEM;
priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
if (priv->ssp == NULL) {
ret = -ENODEV;
goto err_priv;
if (dev->of_node) {
struct device_node *ssp_handle;
ssp_handle = of_parse_phandle(dev->of_node, "port", 0);
if (!ssp_handle) {
dev_err(dev, "unable to get 'port' phandle\n");
return -ENODEV;
}
priv->ssp = pxa_ssp_request_of(ssp_handle, "SoC audio");
if (priv->ssp == NULL) {
ret = -ENODEV;
goto err_priv;
}
} else {
priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
if (priv->ssp == NULL) {
ret = -ENODEV;
goto err_priv;
}
}
priv->dai_fmt = (unsigned int) -1;
@ -798,6 +816,12 @@ static const struct snd_soc_component_driver pxa_ssp_component = {
.name = "pxa-ssp",
};
#ifdef CONFIG_OF
static const struct of_device_id pxa_ssp_of_ids[] = {
{ .compatible = "mrvl,pxa-ssp-dai" },
};
#endif
static int asoc_ssp_probe(struct platform_device *pdev)
{
return snd_soc_register_component(&pdev->dev, &pxa_ssp_component,
@ -812,8 +836,9 @@ static int asoc_ssp_remove(struct platform_device *pdev)
static struct platform_driver asoc_ssp_driver = {
.driver = {
.name = "pxa-ssp-dai",
.owner = THIS_MODULE,
.name = "pxa-ssp-dai",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(pxa_ssp_of_ids),
},
.probe = asoc_ssp_probe,