1 files changed, 29 insertions, 0 deletions

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 653435930ad8..b9129efeedf3 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2032,6 +2032,35 @@ void snd_soc_dapm_free(struct snd_soc_device *socdev)
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_free);
 
+/*
+ * snd_soc_dapm_shutdown - callback for system shutdown
+ */
+void snd_soc_dapm_shutdown(struct snd_soc_device *socdev)
+{
+        struct snd_soc_codec *codec = socdev->card->codec;
+        struct snd_soc_dapm_widget *w;
+        LIST_HEAD(down_list);
+        int powerdown = 0;
+
+        list_for_each_entry(w, &codec->dapm_widgets, list) {
+                if (w->power) {
+                        dapm_seq_insert(w, &down_list, dapm_down_seq);
+                        powerdown = 1;
+                }
+        }
+
+        /* If there were no widgets to power down we're already in
+         * standby.
+         */
+        if (powerdown) {
+                snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_PREPARE);
+                dapm_seq_run(codec, &down_list, 0, dapm_down_seq);
+                snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_STANDBY);
+        }
+
+        snd_soc_dapm_set_bias_level(socdev, SND_SOC_BIAS_OFF);
+}
+
 /* Module information */
 MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
 MODULE_DESCRIPTION("Dynamic Audio Power Management core for ALSA SoC");