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>

1 files changed, 11 insertions, 2 deletions

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);