linux-kernel - [PATCH v1 2/4] ASoC: codecs: tfa989x: Add support for tfa9897

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Message-Id: <20210528105101.508254-2-vincent.knecht@mailoo.org>
Date:   Fri, 28 May 2021 12:50:59 +0200
From:   Vincent Knecht <vincent.knecht@...loo.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Vincent Knecht <vincent.knecht@...loo.org>,
        Stephan Gerhold <stephan@...hold.net>,
        Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/4] ASoC: codecs: tfa989x: Add support for tfa9897

Add specific init function to poke needed registers & values for this IC

Signed-off-by: Vincent Knecht <vincent.knecht@...loo.org>
---
 sound/soc/codecs/tfa989x.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/sound/soc/codecs/tfa989x.c b/sound/soc/codecs/tfa989x.c
index 408e26eee108..6d94865c534b 100644
--- a/sound/soc/codecs/tfa989x.c
+++ b/sound/soc/codecs/tfa989x.c
@@ -44,6 +44,7 @@
 #define TFA989X_CURRENTSENSE4		0x49
 
 #define TFA9895_REVISION		0x12
+#define TFA9897_REVISION		0x97
 
 struct tfa989x_rev {
 	unsigned int rev;
@@ -175,6 +176,29 @@ static const struct tfa989x_rev tfa9895_rev = {
 	.init	= tfa9895_init,
 };
 
+static int tfa9897_init(struct regmap *regmap)
+{
+	int ret;
+
+	/* Reduce slewrate by clearing iddqtestbst to avoid booster damage */
+	ret = regmap_write(regmap, TFA989X_CURRENTSENSE3, 0x0300);
+	if (ret)
+		return ret;
+
+	/* Enable clipping */
+	ret = regmap_clear_bits(regmap, TFA989X_CURRENTSENSE4, 0x1);
+	if (ret)
+		return ret;
+
+	/* Set required TDM configuration */
+	return regmap_write(regmap, 0x14, 0x0);
+}
+
+static const struct tfa989x_rev tfa9897_rev = {
+	.rev	= TFA9897_REVISION,
+	.init	= tfa9897_init,
+};
+
 /*
  * Note: At the moment this driver bypasses the "CoolFlux DSP" built into the
  * TFA989X amplifiers. Unfortunately, there seems to be absolutely
@@ -280,6 +304,7 @@ static int tfa989x_i2c_probe(struct i2c_client *i2c)
 
 static const struct of_device_id tfa989x_of_match[] = {
 	{ .compatible = "nxp,tfa9895", .data = &tfa9895_rev },
+	{ .compatible = "nxp,tfa9897", .data = &tfa9897_rev },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, tfa989x_of_match);
-- 
2.31.1