[PATCH 7/8] ASoC: max98396: Implement DSP speaker monitor

[Daniel Mack <daniel@zonque.org>]

Allow the selection of the TDM slot that is used to send back speaker
monitor data. The DT property adi,spkfb-slot-no can be used to configure
this setting which defaults to 2.

Signed-off-by: Daniel Mack <daniel@zonque.org>
---
 sound/soc/codecs/max98396.c | 8 ++++++++
 sound/soc/codecs/max98396.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/sound/soc/codecs/max98396.c b/sound/soc/codecs/max98396.c
index 0a1d98279a3e..f28831f4e74b 100644
--- a/sound/soc/codecs/max98396.c
+++ b/sound/soc/codecs/max98396.c
@@ -1377,6 +1377,9 @@ static int max98396_probe(struct snd_soc_component *component)
 	regmap_write(max98396->regmap,
 		     MAX98396_R2045_PCM_TX_CTRL_2,
 		     max98396->i_slot);
+	regmap_write(max98396->regmap,
+		     MAX98396_R204A_PCM_TX_CTRL_7,
+		     max98396->spkfb_slot);
 
 	if (max98396->v_slot < 8)
 		if (max98396->device_id == CODEC_TYPE_MAX98396)
@@ -1552,6 +1555,11 @@ static void max98396_read_device_property(struct device *dev,
 	else
 		max98396->i_slot = 1;
 
+	if (!device_property_read_u32(dev, "adi,spkfb-slot-no", &value))
+		max98396->spkfb_slot = value & 0xF;
+	else
+		max98396->spkfb_slot = 2;
+
 	if (!device_property_read_u32(dev, "adi,bypass-slot-no", &value))
 		max98396->bypass_slot = value & 0xF;
 	else
diff --git a/sound/soc/codecs/max98396.h b/sound/soc/codecs/max98396.h
index 8fa081f5d2d3..ff330ef61568 100644
--- a/sound/soc/codecs/max98396.h
+++ b/sound/soc/codecs/max98396.h
@@ -303,6 +303,7 @@ struct max98396_priv {
 	struct regulator *pvdd, *vbat;
 	unsigned int v_slot;
 	unsigned int i_slot;
+	unsigned int spkfb_slot;
 	unsigned int bypass_slot;
 	bool interleave_mode;
 	unsigned int ch_size;
-- 
2.36.1