Subject: [PATCH 036/104] ASoC: core - platform widget IO

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

Signed-off-by: Liam Girdwood <lrg@ti.com>

4 files changed, 18 insertions, 2 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 602024d4c45..e09505c5a49 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -447,6 +447,7 @@ struct snd_soc_dapm_widget {
         char *name;             /* widget name */
         char *sname;    /* stream name */
         struct snd_soc_codec *codec;
+        struct snd_soc_platform *platform;
         struct list_head list;
         struct snd_soc_dapm_context *dapm;
 
@@ -510,6 +511,7 @@ struct snd_soc_dapm_context {
 
         struct device *dev; /* from parent - for debug */
         struct snd_soc_codec *codec; /* parent codec */
+        struct snd_soc_platform *platform; /* parent platform */
         struct snd_soc_card *card; /* parent card */
 
         /* used during DAPM updates */
diff --git a/include/sound/soc.h b/include/sound/soc.h
index c421501532d..6ce8dc32a3d 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -682,6 +682,8 @@ struct snd_soc_platform {
         struct snd_soc_card *card;
         struct list_head list;
         struct list_head card_list;
+
+        struct snd_soc_dapm_context dapm;
 };
 
 struct snd_soc_dai_link {
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3c1a8965721..52888b5e91d 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -995,6 +995,7 @@ 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;
@@ -3138,6 +3139,8 @@ 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 79fdcd7cfd8..13f4bdea936 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -130,14 +130,22 @@ 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,
@@ -2497,6 +2505,7 @@ 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);