ASoC: core - Add platform widget IO

Allow platform driver widgets to perform any IO required for DAPM.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 15 insertions, 2 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 16651814ecba..38f954af7bb5 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -993,6 +993,7 @@ static int soc_probe_platform(struct snd_soc_card *card,
         const struct snd_soc_platform_driver *driver = platform->driver;
 
         platform->card = card;
+        platform->dapm.card = card;
 
         if (!try_module_get(platform->dev->driver->owner))
                 return -ENODEV;
@@ -1010,6 +1011,7 @@ static int soc_probe_platform(struct snd_soc_card *card,
         /* mark platform as probed and add to card platform list */
         platform->probed = 1;
         list_add(&platform->card_list, &card->platform_dev_list);
+        list_add(&platform->dapm.list, &card->dapm_list);
 
         return 0;
 
@@ -3122,6 +3124,8 @@ int snd_soc_register_platform(struct device *dev,
 
         platform->dev = dev;
         platform->driver = platform_drv;
+        platform->dapm.dev = dev;
+        platform->dapm.platform = platform;
 
         mutex_lock(&client_mutex);
         list_add(&platform->list, &platform_list);
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index ceb2ba44fd3f..54fa2e5e3078 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -128,14 +128,22 @@ static int soc_widget_read(struct snd_soc_dapm_widget *w, int reg)
 {
         if (w->codec)
                 return snd_soc_read(w->codec, reg);
-        return 0;
+        else if (w->platform)
+                return snd_soc_platform_read(w->platform, reg);
+
+        dev_err(w->dapm->dev, "no valid widget read method\n");
+        return -1;
 }
 
 static int soc_widget_write(struct snd_soc_dapm_widget *w, int reg, int val)
 {
         if (w->codec)
                 return snd_soc_write(w->codec, reg, val);
-        return 0;
+        else if (w->platform)
+                return snd_soc_platform_write(w->platform, reg, val);
+
+        dev_err(w->dapm->dev, "no valid widget write method\n");
+        return -1;
 }
 
 static int soc_widget_update_bits(struct snd_soc_dapm_widget *w,
@@ -2495,6 +2503,7 @@ int snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
         dapm->n_widgets++;
         w->dapm = dapm;
         w->codec = dapm->codec;
+        w->platform = dapm->platform;
         INIT_LIST_HEAD(&w->sources);
         INIT_LIST_HEAD(&w->sinks);
         INIT_LIST_HEAD(&w->list);