ASoC: omap-mcbsp: Add device tree bindings

Device tree support for McBSP modules on OMAP2+ SoC.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 65 insertions, 1 deletions

diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index b9770eea28a0..2e1750e2ab31 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -26,6 +26,8 @@
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -737,13 +739,74 @@ int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd)
 }
 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
 
+static struct omap_mcbsp_platform_data omap2420_pdata = {
+        .reg_step = 4,
+        .reg_size = 2,
+};
+
+static struct omap_mcbsp_platform_data omap2430_pdata = {
+        .reg_step = 4,
+        .reg_size = 4,
+        .has_ccr = true,
+};
+
+static struct omap_mcbsp_platform_data omap3_pdata = {
+        .reg_step = 4,
+        .reg_size = 4,
+        .has_ccr = true,
+        .has_wakeup = true,
+};
+
+static struct omap_mcbsp_platform_data omap4_pdata = {
+        .reg_step = 4,
+        .reg_size = 4,
+        .has_ccr = true,
+        .has_wakeup = true,
+};
+
+static const struct of_device_id omap_mcbsp_of_match[] = {
+        {
+                .compatible = "ti,omap2420-mcbsp",
+                .data = &omap2420_pdata,
+        },
+        {
+                .compatible = "ti,omap2430-mcbsp",
+                .data = &omap2430_pdata,
+        },
+        {
+                .compatible = "ti,omap3-mcbsp",
+                .data = &omap3_pdata,
+        },
+        {
+                .compatible = "ti,omap4-mcbsp",
+                .data = &omap4_pdata,
+        },
+        { },
+};
+MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match);
+
 static __devinit int asoc_mcbsp_probe(struct platform_device *pdev)
 {
         struct omap_mcbsp_platform_data *pdata = dev_get_platdata(&pdev->dev);
         struct omap_mcbsp *mcbsp;
+        const struct of_device_id *match;
         int ret;
 
-        if (!pdata) {
+        match = of_match_device(omap_mcbsp_of_match, &pdev->dev);
+        if (match) {
+                struct device_node *node = pdev->dev.of_node;
+                int buffer_size;
+
+                pdata = devm_kzalloc(&pdev->dev,
+                                     sizeof(struct omap_mcbsp_platform_data),
+                                     GFP_KERNEL);
+                if (!pdata)
+                        return -ENOMEM;
+
+                memcpy(pdata, match->data, sizeof(*pdata));
+                if (!of_property_read_u32(node, "ti,buffer-size", &buffer_size))
+                        pdata->buffer_size = buffer_size;
+        } else if (!pdata) {
                 dev_err(&pdev->dev, "missing platform data.\n");
                 return -EINVAL;
         }
@@ -785,6 +848,7 @@ static struct platform_driver asoc_mcbsp_driver = {
         .driver = {
                         .name = "omap-mcbsp",
                         .owner = THIS_MODULE,
+                        .of_match_table = omap_mcbsp_of_match,
         },
 
         .probe = asoc_mcbsp_probe,