ASoC: core: Add strobe control

Added support for a control that strobes a bit in
a register to high then back to low (or the inverse).

This is typically useful for hardware that requires
strobing a singe bit to trigger some functionality
and where exposing the bit in a normal single control
would require the user to first manually set then
again unset the bit again for the strobe to trigger.

Added convenience macro.

SOC_SINGLE_STROBE

Added accessor implementations.

snd_soc_get_strobe
snd_soc_put_strobe

Signed-off-by: Kristoffer KARLSSON <kristoffer.karlsson@stericsson.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/sound/soc.h b/include/sound/soc.h
index c0656b771c38..1f38aa1653c8 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -219,6 +219,10 @@
                 {.regbase = xregbase, .regcount = xregcount, .nbits = xnbits, \
                 .invert = xinvert, .min = xmin, .max = xmax} }
 
+#define SOC_SINGLE_STROBE(xname, xreg, xshift, xinvert) \
+        SOC_SINGLE_EXT(xname, xreg, xshift, 1, xinvert, \
+                snd_soc_get_strobe, snd_soc_put_strobe)
+
 /*
  * Simplified versions of above macros, declaring a struct and calculating
  * ARRAY_SIZE internally
@@ -461,6 +465,10 @@ int snd_soc_get_xr_sx(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
 int snd_soc_put_xr_sx(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol);
+int snd_soc_get_strobe(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol);
+int snd_soc_put_strobe(struct snd_kcontrol *kcontrol,
+        struct snd_ctl_elem_value *ucontrol);
 
 /**
  * struct snd_soc_reg_access - Describes whether a given register is