ASoC: pxa: pxa-ssp: add DT bindings
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>
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Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt
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28
Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt
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@ -0,0 +1,28 @@
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Marvell PXA SSP CPU DAI bindings
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Required properties:
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compatible Must be "mrvl,pxa-ssp-dai"
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port A phandle reference to a PXA ssp upstream device
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Example:
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/* upstream device */
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ssp0: ssp@41000000 {
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compatible = "mrvl,pxa3xx-ssp";
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reg = <0x41000000 0x40>;
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interrupts = <24>;
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clock-names = "pxa27x-ssp.0";
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dmas = <&dma 13
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&dma 14>;
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dma-names = "rx", "tx";
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};
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/* DAI as user */
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ssp_dai0: ssp_dai@0 {
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compatible = "mrvl,pxa-ssp-dai";
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port = <&ssp0>;
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};
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@ -21,6 +21,7 @@
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/pxa2xx_ssp.h>
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#include <linux/of.h>
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#include <asm/irq.h>
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@ -719,6 +720,7 @@ static int pxa_ssp_trigger(struct snd_pcm_substream *substream, int cmd,
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static int pxa_ssp_probe(struct snd_soc_dai *dai)
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{
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struct device *dev = dai->dev;
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struct ssp_priv *priv;
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int ret;
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@ -726,10 +728,26 @@ static int pxa_ssp_probe(struct snd_soc_dai *dai)
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if (!priv)
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return -ENOMEM;
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priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
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if (priv->ssp == NULL) {
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ret = -ENODEV;
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goto err_priv;
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if (dev->of_node) {
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struct device_node *ssp_handle;
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ssp_handle = of_parse_phandle(dev->of_node, "port", 0);
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if (!ssp_handle) {
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dev_err(dev, "unable to get 'port' phandle\n");
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return -ENODEV;
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}
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priv->ssp = pxa_ssp_request_of(ssp_handle, "SoC audio");
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if (priv->ssp == NULL) {
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ret = -ENODEV;
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goto err_priv;
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}
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} else {
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priv->ssp = pxa_ssp_request(dai->id + 1, "SoC audio");
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if (priv->ssp == NULL) {
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ret = -ENODEV;
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goto err_priv;
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}
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}
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priv->dai_fmt = (unsigned int) -1;
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@ -798,6 +816,12 @@ static const struct snd_soc_component_driver pxa_ssp_component = {
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.name = "pxa-ssp",
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};
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#ifdef CONFIG_OF
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static const struct of_device_id pxa_ssp_of_ids[] = {
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{ .compatible = "mrvl,pxa-ssp-dai" },
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};
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#endif
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static int asoc_ssp_probe(struct platform_device *pdev)
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{
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return snd_soc_register_component(&pdev->dev, &pxa_ssp_component,
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@ -812,8 +836,9 @@ static int asoc_ssp_remove(struct platform_device *pdev)
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static struct platform_driver asoc_ssp_driver = {
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.driver = {
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.name = "pxa-ssp-dai",
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.owner = THIS_MODULE,
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.name = "pxa-ssp-dai",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(pxa_ssp_of_ids),
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},
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.probe = asoc_ssp_probe,
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