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@xxxxxxxxx>
---
.../devicetree/bindings/sound/mrvl,pxa-ssp.txt | 28 ++++++++++++++++
sound/soc/pxa/pxa-ssp.c | 37 ++++++++++++++++++----
2 files changed, 59 insertions(+), 6 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt
diff --git a/Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt b/Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt
new file mode 100644
index 0000000..74c9ba6
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/mrvl,pxa-ssp.txt
@@ -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>;
+ };
+
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index 6f4dd75..19296f2 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -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,
--
1.8.3.1
--
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