ASoC: Provide REGULATOR_SUPPLY widget type

Modern devices allow systems to enable and disable individual supplies on
the device, allowing additional power saving by switching off regulators
which power portions of the device which are not currently in use. Add a
new SND_SOC_DAPM_REGULATOR_SUPPLY widget type factoring out the code for
managing such widgets from individual drivers.

The widget name will be used as the supply name when requesting the
regulator from the regulator API.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index d26a9b78477..bfa0d3cbbf2 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -243,6 +243,10 @@
 {       .id = snd_soc_dapm_supply, .name = wname, .reg = wreg,  \
         .shift = wshift, .invert = winvert, .event = wevent, \
         .event_flags = wflags}
+#define SND_SOC_DAPM_REGULATOR_SUPPLY(wname, wdelay) \
+{       .id = snd_soc_dapm_regulator_supply, .name = wname, \
+        .reg = SND_SOC_NOPM, .shift = wdelay, .event = dapm_regulator_event, \
+        .event_flags = SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD }
 
 /* dapm kcontrol types */
 #define SOC_DAPM_SINGLE(xname, reg, shift, max, invert) \
@@ -322,6 +326,8 @@ struct snd_soc_dapm_context;
 
 int dapm_reg_event(struct snd_soc_dapm_widget *w,
                    struct snd_kcontrol *kcontrol, int event);
+int dapm_regulator_event(struct snd_soc_dapm_widget *w,
+                         struct snd_kcontrol *kcontrol, int event);
 
 /* dapm controls */
 int snd_soc_dapm_put_volsw(struct snd_kcontrol *kcontrol,
@@ -411,6 +417,7 @@ enum snd_soc_dapm_type {
         snd_soc_dapm_pre,                       /* machine specific pre widget - exec first */
         snd_soc_dapm_post,                      /* machine specific post widget - exec last */
         snd_soc_dapm_supply,            /* power/clock supply */
+        snd_soc_dapm_regulator_supply,  /* external regulator */
         snd_soc_dapm_aif_in,            /* audio interface input */
         snd_soc_dapm_aif_out,           /* audio interface output */
         snd_soc_dapm_siggen,            /* signal generator */
@@ -465,6 +472,8 @@ struct snd_soc_dapm_widget {
         struct list_head list;
         struct snd_soc_dapm_context *dapm;
 
+        void *priv;                             /* widget specific data */
+
         /* dapm control */
         short reg;                                              /* negative reg = no direct dapm */
         unsigned char shift;                    /* bits to shift */