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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2016-05-27 16:45:45 +0300
committerMark Brown <broonie@kernel.org>2016-05-30 18:19:46 +0300
commitdcc0799bf75c43f3d4e65716c88f35933da186cf (patch)
tree598a4e7156aca307df1a5e367b763f808581d949 /include/sound
parent1a695a905c18548062509178b98bc91e67510864 (diff)
downloadlinux-dcc0799bf75c43f3d4e65716c88f35933da186cf.tar.xz
ASoC: Introduce SOC_SINGLE_S8_TLV() macro
This patch introduces SOC_SINGLE_S8_TLV() macro for volume control on chips which supports both negative and positive gains with sign bit on a 8 bit register, Gain ranges from -128 to +127 with a predefined step size. Currently we only have support to DOUBLE_S8_TLV() which does not fit for cases where we just have separate gain control register for each channel. One of the Qualcomm SOC msm8916 has such gain control register whose gain range is from -38.4dB to +38.4dB with step size of 0.3dB. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/soc.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/sound/soc.h b/include/sound/soc.h
index fd7b58a58d6f..6144882cc96a 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -179,6 +179,17 @@
.get = snd_soc_get_volsw, .put = snd_soc_put_volsw, \
.private_value = SOC_DOUBLE_R_S_VALUE(reg_left, reg_right, xshift, \
xmin, xmax, xsign_bit, xinvert) }
+#define SOC_SINGLE_S8_TLV(xname, xreg, xmin, xmax, tlv_array) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
+ .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
+ SNDRV_CTL_ELEM_ACCESS_READWRITE, \
+ .tlv.p = (tlv_array), \
+ .info = snd_soc_info_volsw, .get = snd_soc_get_volsw,\
+ .put = snd_soc_put_volsw, \
+ .private_value = (unsigned long)&(struct soc_mixer_control) \
+ {.reg = xreg, .rreg = xreg, \
+ .min = xmin, .max = xmax, .platform_max = xmax, \
+ .sign_bit = 7,} }
#define SOC_DOUBLE_S8_TLV(xname, xreg, xmin, xmax, tlv_array) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \