ALSA: Allow passing platform_data for pxa2xx-ac97

This patch adds support for passing platform data to ac97 bus devices
from PXA2xx-AC97 driver..

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

4 files changed, 27 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/include/mach/audio.h b/arch/arm/mach-pxa/include/mach/audio.h
index 16eb02552d5d..a3449e35a6f5 100644
--- a/arch/arm/mach-pxa/include/mach/audio.h
+++ b/arch/arm/mach-pxa/include/mach/audio.h
@@ -3,10 +3,12 @@
 
 #include <sound/core.h>
 #include <sound/pcm.h>
+#include <sound/ac97_codec.h>
 
 /*
  * @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95)
  *              a -1 value means no gpio will be used for reset
+ * @codec_pdata: AC97 codec platform_data
 
  * reset_gpio should only be specified for pxa27x CPUs where a silicon
  * bug prevents correct operation of the reset line. If not specified,
@@ -20,6 +22,7 @@ typedef struct {
         void (*resume)(void *);
         void *priv;
         int reset_gpio;
+        void *codec_pdata[AC97_BUS_MAX_DEVICES];
 } pxa2xx_audio_ops_t;
 
 extern void pxa_set_ac97_info(pxa2xx_audio_ops_t *ops);
diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h
index 9b1c0985480c..3dae3f799b9b 100644
--- a/include/sound/ac97_codec.h
+++ b/include/sound/ac97_codec.h
@@ -32,6 +32,9 @@
 #include "control.h"
 #include "info.h"
 
+/* maximum number of devices on the AC97 bus */
+#define AC97_BUS_MAX_DEVICES    4
+
 /*
  *  AC'97 codec registers
  */
diff --git a/sound/arm/pxa2xx-ac97.c b/sound/arm/pxa2xx-ac97.c
index c570ebd9d177..6c00ea45d5cb 100644
--- a/sound/arm/pxa2xx-ac97.c
+++ b/sound/arm/pxa2xx-ac97.c
@@ -170,6 +170,13 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
         struct snd_ac97_bus *ac97_bus;
         struct snd_ac97_template ac97_template;
         int ret;
+        pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;
+
+        if (dev->id >= 0) {
+                dev_err(&dev->dev, "PXA2xx has only one AC97 port.\n");
+                ret = -ENXIO;
+                goto err_dev;
+        }
 
         ret = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
                               THIS_MODULE, 0, &card);
@@ -200,6 +207,8 @@ static int __devinit pxa2xx_ac97_probe(struct platform_device *dev)
         snprintf(card->longname, sizeof(card->longname),
                  "%s (%s)", dev->dev.driver->name, card->mixername);
 
+        if (pdata && pdata->codec_data)
+                snd_ac97_dev_add_pdata(ac97_bus->codec[0], pdata->codec_pdata);
         snd_card_set_dev(card, &dev->dev);
         ret = snd_card_register(card);
         if (ret == 0) {
@@ -212,6 +221,7 @@ err_remove:
 err:
         if (card)
                 snd_card_free(card);
+err_dev:
         return ret;
 }
 
diff --git a/sound/soc/pxa/pxa2xx-ac97.c b/sound/soc/pxa/pxa2xx-ac97.c
index d9c94d71fa61..7330e5c5b9df 100644
--- a/sound/soc/pxa/pxa2xx-ac97.c
+++ b/sound/soc/pxa/pxa2xx-ac97.c
@@ -22,6 +22,7 @@
 #include <mach/hardware.h>
 #include <mach/regs-ac97.h>
 #include <mach/dma.h>
+#include <mach/audio.h>
 
 #include "pxa2xx-pcm.h"
 #include "pxa2xx-ac97.h"
@@ -241,9 +242,18 @@ EXPORT_SYMBOL_GPL(soc_ac97_ops);
 static int __devinit pxa2xx_ac97_dev_probe(struct platform_device *pdev)
 {
         int i;
+        pxa2xx_audio_ops_t *pdata = pdev->dev.platform_data;
 
-        for (i = 0; i < ARRAY_SIZE(pxa_ac97_dai); i++)
+        if (pdev->id >= 0) {
+                dev_err(&pdev->dev, "PXA2xx has only one AC97 port.\n");
+                return -ENXIO;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(pxa_ac97_dai); i++) {
                 pxa_ac97_dai[i].dev = &pdev->dev;
+                if (pdata && pdata->codec_pdata)
+                        pxa_ac97_dai[i].ac97_pdata = pdata->codec_pdata;
+        }
 
         /* Punt most of the init to the SoC probe; we may need the machine
          * driver to do interesting things with the clocking to get us up