linux-kernel - [PATCH v2 15/20] ASoC: mediatek: mt6359-accdet: Always set micbias1 to 2.8V

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Message-Id: <20250302-mt6359-accdet-dts-v2-15-5bd633ee0d47@collabora.com>
Date: Sun, 02 Mar 2025 13:30:54 -0300
From: Nícolas F. R. A. Prado <nfraprado@...labora.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Sen Chu <sen.chu@...iatek.com>, Sean Wang <sean.wang@...iatek.com>, 
 Macpaul Lin <macpaul.lin@...iatek.com>, Lee Jones <lee@...nel.org>, 
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: kernel@...labora.com, linux-sound@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 linux-pm@...r.kernel.org, 
 Nícolas F. R. A. Prado <nfraprado@...labora.com>
Subject: [PATCH v2 15/20] ASoC: mediatek: mt6359-accdet: Always set
 micbias1 to 2.8V

The driver currently reads a mediatek,mic-vol property from DT to
determine the micbias1 setting to configure in hardware. Since there are
no current users of the property and the default value (2.8V) is known
to work on multiple boards, remove the code handling this property and
instead always configure the micbias1 to 2.8V. The property can be
properly introduced in the binding in the future if it really turns out
that different boards need different configurations.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
---
 sound/soc/codecs/mt6359-accdet.c | 23 +++--------------------
 sound/soc/codecs/mt6359-accdet.h |  1 -
 2 files changed, 3 insertions(+), 21 deletions(-)

diff --git a/sound/soc/codecs/mt6359-accdet.c b/sound/soc/codecs/mt6359-accdet.c
index 83e65b6d5845dea00a8a77d68df4b7df1f62a87c..a31e084560c7643b14fb71871699e3167075d9d9 100644
--- a/sound/soc/codecs/mt6359-accdet.c
+++ b/sound/soc/codecs/mt6359-accdet.c
@@ -494,11 +494,6 @@ static int mt6359_accdet_parse_dt(struct mt6359_accdet *priv)
 	if (!node)
 		return -EINVAL;

-	ret = of_property_read_u32(node, "mediatek,mic-vol",
-				   &priv->data->mic_vol);
-	if (ret)
-		priv->data->mic_vol = 8;
-
 	ret = of_property_read_u32(node, "mediatek,mic-mode",
 				   &priv->data->mic_mode);
 	if (ret)
@@ -657,22 +652,10 @@ static void mt6359_accdet_init(struct mt6359_accdet *priv)
 		      ACCDET_RISE_DELAY));

 	regmap_read(priv->regmap, RG_AUDPWDBMICBIAS1_ADDR, &reg);
-	if (priv->data->mic_vol <= 7) {
-		/* micbias1 <= 2.7V */
-		regmap_write(priv->regmap, RG_AUDPWDBMICBIAS1_ADDR,
-			     reg | (priv->data->mic_vol << RG_AUDMICBIAS1VREF_SFT) |
-			     RG_AUDMICBIAS1LOWPEN_MASK_SFT);
-	} else if (priv->data->mic_vol == 8) {
-		/* micbias1 = 2.8v */
-		regmap_write(priv->regmap, RG_AUDPWDBMICBIAS1_ADDR,
-			     reg | (3 << RG_AUDMICBIAS1HVEN_SFT) |
+	/* micbias1 = 2.8v */
+	regmap_write(priv->regmap, RG_AUDPWDBMICBIAS1_ADDR,
+		     reg | (3 << RG_AUDMICBIAS1HVEN_SFT) |
 			     RG_AUDMICBIAS1LOWPEN_MASK_SFT);
-	} else if (priv->data->mic_vol == 9) {
-		/* micbias1 = 2.85v */
-		regmap_write(priv->regmap, RG_AUDPWDBMICBIAS1_ADDR,
-			     reg | (1 << RG_AUDMICBIAS1HVEN_SFT) |
-			     RG_AUDMICBIAS1LOWPEN_MASK_SFT);
-	}
 	/* mic mode setting */
 	regmap_read(priv->regmap, RG_AUDACCDETMICBIAS0PULLLOW_ADDR, &reg);
 	if (priv->data->mic_mode == HEADSET_MODE_1) {
diff --git a/sound/soc/codecs/mt6359-accdet.h b/sound/soc/codecs/mt6359-accdet.h
index ff5cd6ea1b06f045b6e1b9f6bc53ef80d78e3b92..46dcd4759230a5190434b9b7c785e8b9ed12fd3d 100644
--- a/sound/soc/codecs/mt6359-accdet.h
+++ b/sound/soc/codecs/mt6359-accdet.h
@@ -51,7 +51,6 @@ enum {
 };

 struct dts_data {
-	unsigned int mic_vol;
 	unsigned int mic_mode;
 	bool hp_eint_high;
 	unsigned int eint_comp_vth;

-- 
2.48.1