[PATCH v2 3/4] ASoC: tas5720: set bit 7 in ANALOG_CTRL_REG for TAS5720A-Q1 during probe

[Alexandru Ardelean]

From: Steffen Aschbacher <steffen.aschbacher at stihl.de>

Set the reserved bit 7 in the ANALOG_CTRL_REG for the TAS5720A-Q1 device,
when probing.
The datasheet mentions that the bit should be 1 during reset/powerup.

The device did not initialize before setting this value to 1. So, this
could be a quirk of this device. Or it could be a quirk with the board on
which it was tested.
That is why this patch is separate from the patch that adds support for the
TAS5720A-Q1 device.

Signed-off-by: Steffen Aschbacher <steffen.aschbacher at stihl.de>
Signed-off-by: Alexandru Ardelean <alex at shruggie.ro>
---

Changelog v1 -> v2:
- https://lore.kernel.org/alsa-devel/20230115193347.24190-3-alex@shruggie.ro/
- No change

 sound/soc/codecs/tas5720.c | 13 +++++++++++++
 sound/soc/codecs/tas5720.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/sound/soc/codecs/tas5720.c b/sound/soc/codecs/tas5720.c
index 2ad8fb29d005..de6d01c8fdd3 100644
--- a/sound/soc/codecs/tas5720.c
+++ b/sound/soc/codecs/tas5720.c
@@ -351,6 +351,19 @@ static int tas5720_codec_probe(struct snd_soc_component *component)
 	if (ret < 0)
 		goto error_snd_soc_component_update_bits;
 
+	/* Set Bit 7 in TAS5720_ANALOG_CTRL_REG to 1 for TAS5720A_Q1 */
+	switch (tas5720->devtype) {
+	case TAS5720A_Q1:
+		ret = snd_soc_component_update_bits(component, TAS5720_ANALOG_CTRL_REG,
+						    TAS5720_Q1_RESERVED7_BIT,
+						    TAS5720_Q1_RESERVED7_BIT);
+		break;
+	default:
+		break;
+	}
+	if (ret < 0)
+		goto error_snd_soc_component_update_bits;
+
 	/*
 	 * Enter shutdown mode - our default when not playing audio - to
 	 * minimize current consumption. On the TAS5720 there is no real down
diff --git a/sound/soc/codecs/tas5720.h b/sound/soc/codecs/tas5720.h
index b38459570241..54b59b05ef0a 100644
--- a/sound/soc/codecs/tas5720.h
+++ b/sound/soc/codecs/tas5720.h
@@ -81,6 +81,7 @@
 #define TAS5720_ANALOG_GAIN_SHIFT	(0x2)
 
 /* TAS5720_Q1_ANALOG_CTRL_REG */
+#define TAS5720_Q1_RESERVED7_BIT	BIT(7)
 #define TAS5720_Q1_CHAN_SEL		BIT(1)
 
 /* TAS5720_FAULT_REG */
-- 
2.34.1