[PATCH v2 1/2] ASoC: mediatek: mt6358: support DMIC one-wire mode

[Jiaxin Yu]

Supports DMIC one-wire mode. Uses a DT property "dmic-mode" to select.

Signed-off-by: Jiaxin Yu <jiaxin...@mediatek.com>
---
 sound/soc/codecs/mt6358.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/mt6358.c b/sound/soc/codecs/mt6358.c
index 1b830ea..1f39d59 100644
--- a/sound/soc/codecs/mt6358.c
+++ b/sound/soc/codecs/mt6358.c
@@ -95,6 +95,8 @@ struct mt6358_priv {
        struct regulator *avdd_reg;
 
        int wov_enabled;
+
+       unsigned int dmic_one_wire_mode;
 };
 
 int mt6358_set_mtkaif_protocol(struct snd_soc_component *cmpnt,
@@ -1831,7 +1833,10 @@ static int mt6358_dmic_enable(struct mt6358_priv *priv)
        mt6358_mtkaif_tx_enable(priv);
 
        /* UL dmic setting */
-       regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0080);
+       if (priv->dmic_one_wire_mode)
+               regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0400);
+       else
+               regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_H, 0x0080);
 
        /* UL turn on */
        regmap_write(priv->regmap, MT6358_AFE_UL_SRC_CON0_L, 0x0003);
@@ -2426,6 +2431,20 @@ static int mt6358_codec_probe(struct snd_soc_component 
*cmpnt)
        .num_dapm_routes = ARRAY_SIZE(mt6358_dapm_routes),
 };
 
+static void mt6358_parse_dt(struct mt6358_priv *priv)
+{
+       int ret;
+       struct device *dev = priv->dev;
+
+       ret = of_property_read_u32(dev->of_node, "mediatek,dmic-mode",
+                                  &priv->dmic_one_wire_mode);
+       if (ret) {
+               dev_warn(priv->dev, "%s() failed to read dmic-mode\n",
+                        __func__);
+               priv->dmic_one_wire_mode = 0;
+       }
+}
+
 static int mt6358_platform_driver_probe(struct platform_device *pdev)
 {
        struct mt6358_priv *priv;
@@ -2445,6 +2464,8 @@ static int mt6358_platform_driver_probe(struct 
platform_device *pdev)
        if (IS_ERR(priv->regmap))
                return PTR_ERR(priv->regmap);
 
+       mt6358_parse_dt(priv);
+
        dev_info(priv->dev, "%s(), dev name %s\n",
                 __func__, dev_name(&pdev->dev));
 
-- 
1.8.1.1.dirty