[PATCH 08/10] Added DAI Sel Mux and minor updates

[Ryan Lee]

Signed-off-by: Ryan Lee <ryans....@maximintegrated.com>
---
'DAI Sel Mux' was added.
'max98927_volatile_reg' was added to identify volatile register.

 sound/soc/codecs/max98927.c | 60 +++++++++++++++++++++++++++++++++------------
 sound/soc/codecs/max98927.h |  2 --
 2 files changed, 45 insertions(+), 17 deletions(-)

diff --git a/sound/soc/codecs/max98927.c b/sound/soc/codecs/max98927.c
index df2f4ff..6eb745bd 100755
--- a/sound/soc/codecs/max98927.c
+++ b/sound/soc/codecs/max98927.c
@@ -446,11 +446,24 @@ static int max98927_dac_event(struct snd_soc_dapm_widget 
*w,
        return 0;
 }
 
+static const char * const max98927_switch_text[] = {
+       "Left", "Right", "LeftRight"};
+
+static const struct soc_enum dai_sel_enum =
+       SOC_ENUM_SINGLE(MAX98927_R0025_PCM_TO_SPK_MONOMIX_A,
+               MAX98927_PCM_TO_SPK_MONOMIX_CFG_SHIFT,
+               3, max98927_switch_text);
+
+static const struct snd_kcontrol_new max98927_dai_controls =
+       SOC_DAPM_ENUM("DAI Sel", dai_sel_enum);
+
 static const struct snd_soc_dapm_widget max98927_dapm_widgets[] = {
        SND_SOC_DAPM_AIF_IN("DAI_OUT", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
        SND_SOC_DAPM_DAC_E("Amp Enable", "HiFi Playback", MAX98927_R003A_AMP_EN,
                0, 0, max98927_dac_event,
                SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
+       SND_SOC_DAPM_MUX("DAI Sel Mux", SND_SOC_NOPM, 0, 0,
+               &max98927_dai_controls),
        SND_SOC_DAPM_OUTPUT("BE_OUT"),
 };
 
@@ -476,12 +489,14 @@ static int max98927_spk_gain_put(struct snd_kcontrol 
*kcontrol,
        struct max98927_priv *max98927 = snd_soc_codec_get_drvdata(codec);
        unsigned int sel = ucontrol->value.integer.value[0];
 
-       if (sel < ((1 << MAX98927_Speaker_Gain_Width) - 1)) {
-               regmap_update_bits(max98927->regmap,
-                       MAX98927_R003C_SPK_GAIN,
-                       MAX98927_SPK_PCM_GAIN_MASK, sel);
-               max98927->spk_gain = sel;
-       }
+       /* 0x7 is reserved */
+       if (sel > 6)
+               return -EINVAL;
+
+       regmap_update_bits(max98927->regmap,
+               MAX98927_R003C_SPK_GAIN,
+               MAX98927_SPK_PCM_GAIN_MASK, sel);
+       max98927->spk_gain = sel;
        return 0;
 }
 
@@ -538,6 +553,15 @@ static int max98927_amp_vol_get(struct snd_kcontrol 
*kcontrol,
                MAX98927_AMP_VOL_SHIFT);
 }
 
+static int max98927_amp_vol_put(struct snd_kcontrol *kcontrol,
+       struct snd_ctl_elem_value *ucontrol)
+{
+       return max98927_reg_put(kcontrol, ucontrol,
+               MAX98927_R0036_AMP_VOL_CTRL,
+               MAX98927_AMP_VOL_SEL,
+               MAX98927_AMP_VOL_SHIFT);
+}
+
 static int max98927_amp_dsp_put(struct snd_kcontrol *kcontrol,
        struct snd_ctl_elem_value *ucontrol)
 {
@@ -587,14 +611,6 @@ static int max98927_dre_en_get(struct snd_kcontrol 
*kcontrol,
                MAX98927_R0039_DRE_CTRL,
                MAX98927_DRE_CTRL_DRE_EN, 0);
 }
-static int max98927_amp_vol_put(struct snd_kcontrol *kcontrol,
-       struct snd_ctl_elem_value *ucontrol)
-{
-       return max98927_reg_put(kcontrol, ucontrol,
-               MAX98927_R0036_AMP_VOL_CTRL,
-               MAX98927_AMP_VOL_SEL,
-               7);
-}
 static int max98927_spk_src_get(struct snd_kcontrol *kcontrol,
        struct snd_ctl_elem_value *ucontrol)
 {
@@ -646,6 +662,15 @@ static bool max98927_readable_register(struct device *dev, 
unsigned int reg)
        case MAX98927_R0100_SOFT_RESET:
        case MAX98927_R01FF_REV_ID:
                return true;
+       }
+       return false;
+};
+
+static bool max98927_volatile_reg(struct device *dev, unsigned int reg)
+{
+       switch (reg) {
+       case MAX98927_R0001_INT_RAW1 ... MAX98927_R0009_INT_FLAG3:
+               return true;
        default:
                return false;
        }
@@ -711,7 +736,11 @@ static const struct snd_kcontrol_new 
max98927_snd_controls[] = {
 };
 
 static const struct snd_soc_dapm_route max98927_audio_map[] = {
-       {"BE_OUT", NULL, "Amp Enable"},
+       {"Amp Enable", NULL, "DAI_OUT"},
+       {"DAI Sel Mux", "Left", "Amp Enable"},
+       {"DAI Sel Mux", "Right", "Amp Enable"},
+       {"DAI Sel Mux", "LeftRight", "Amp Enable"},
+       {"BE_OUT", NULL, "DAI Sel Mux"},
 };
 
 static struct snd_soc_dai_driver max98927_dai[] = {
@@ -888,6 +917,7 @@ static const struct regmap_config max98927_regmap = {
        .reg_defaults     = max98927_reg,
        .num_reg_defaults = ARRAY_SIZE(max98927_reg),
        .readable_reg     = max98927_readable_register,
+       .volatile_reg     = max98927_volatile_reg,
        .cache_type       = REGCACHE_RBTREE,
 };
 
diff --git a/sound/soc/codecs/max98927.h b/sound/soc/codecs/max98927.h
index 2de8504..e13e18a 100755
--- a/sound/soc/codecs/max98927.h
+++ b/sound/soc/codecs/max98927.h
@@ -264,6 +264,4 @@ struct max98927_priv {
        unsigned int master;
        unsigned int digital_gain;
 };
-#define MAX98927_Speaker_Gain_Width 3
-#define MAX98927_AMP_VOL_LOCATION_SHIFT 7
 #endif
-- 
2.7.4