ASoC: mxs: add device tree support for mxs-sgtl5000

Add device tree probe for mxs-sgtl5000 machine driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/sound/soc/mxs/mxs-sgtl5000.c b/sound/soc/mxs/mxs-sgtl5000.c
index e9e6112ff196..3e6e8764b2e6 100644
--- a/sound/soc/mxs/mxs-sgtl5000.c
+++ b/sound/soc/mxs/mxs-sgtl5000.c
@@ -18,6 +18,8 @@
 
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
@@ -110,11 +112,48 @@ static struct snd_soc_card mxs_sgtl5000 = {
         .num_links      = ARRAY_SIZE(mxs_sgtl5000_dai),
 };
 
+static int __devinit mxs_sgtl5000_probe_dt(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+        struct device_node *saif_np[2], *codec_np;
+        int i, ret = 0;
+
+        if (!np)
+                return 1; /* no device tree */
+
+        saif_np[0] = of_parse_phandle(np, "saif-controllers", 0);
+        saif_np[1] = of_parse_phandle(np, "saif-controllers", 1);
+        codec_np = of_parse_phandle(np, "audio-codec", 0);
+        if (!saif_np[0] || !saif_np[1] || !codec_np) {
+                dev_err(&pdev->dev, "phandle missing or invalid\n");
+                return -EINVAL;
+        }
+
+        for (i = 0; i < 2; i++) {
+                mxs_sgtl5000_dai[i].codec_name = NULL;
+                mxs_sgtl5000_dai[i].codec_of_node = codec_np;
+                mxs_sgtl5000_dai[i].cpu_dai_name = NULL;
+                mxs_sgtl5000_dai[i].cpu_dai_of_node = saif_np[i];
+                mxs_sgtl5000_dai[i].platform_name = NULL;
+                mxs_sgtl5000_dai[i].platform_of_node = saif_np[i];
+        }
+
+        of_node_put(codec_np);
+        of_node_put(saif_np[0]);
+        of_node_put(saif_np[1]);
+
+        return ret;
+}
+
 static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
 {
         struct snd_soc_card *card = &mxs_sgtl5000;
         int ret;
 
+        ret = mxs_sgtl5000_probe_dt(pdev);
+        if (ret < 0)
+                return ret;
+
         /*
          * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
          * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
@@ -148,10 +187,17 @@ static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
         return 0;
 }
 
+static const struct of_device_id mxs_sgtl5000_dt_ids[] = {
+        { .compatible = "fsl,mxs-audio-sgtl5000", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mxs_sgtl5000_dt_ids);
+
 static struct platform_driver mxs_sgtl5000_audio_driver = {
         .driver = {
                 .name = "mxs-sgtl5000",
                 .owner = THIS_MODULE,
+                .of_match_table = mxs_sgtl5000_dt_ids,
         },
         .probe = mxs_sgtl5000_probe,
         .remove = __devexit_p(mxs_sgtl5000_remove),