linux-kernel - [PATCH v2] ASoC: ak4642: Simplify probe()

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Message-Id: <20230828180003.127896-1-biju.das.jz@bp.renesas.com>
Date:   Mon, 28 Aug 2023 19:00:03 +0100
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     Biju Das <biju.das.jz@...renesas.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2] ASoC: ak4642: Simplify probe()

Simpilfy probe() by replacing of_device_get_match_data() and id lookup for
retrieving match data by i2c_get_match_data() and replace
dev_err()->dev_err_probe().

While at it, drop local variable np and use dev_fwnode() instead and
remove comma in the terminator entry.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
Note:
 This patch is only compile tested.

v1->v2:
 * Removed forward declaration ak4642_of_match and ak4642_i2c_id.
 * Restored error EINVAL.
 * Used dev_fwnode() and replaced dev->of_node.
 * Removed comma in the terminator entry.
---
 sound/soc/codecs/ak4642.c | 28 +++++++---------------------
 1 file changed, 7 insertions(+), 21 deletions(-)

diff --git a/sound/soc/codecs/ak4642.c b/sound/soc/codecs/ak4642.c
index 2a8984c1fa9c..8a40c6b3f4d8 100644
--- a/sound/soc/codecs/ak4642.c
+++ b/sound/soc/codecs/ak4642.c
@@ -628,37 +628,23 @@ static struct clk *ak4642_of_parse_mcko(struct device *dev)
 #define ak4642_of_parse_mcko(d) 0
 #endif
 
-static const struct of_device_id ak4642_of_match[];
-static const struct i2c_device_id ak4642_i2c_id[];
 static int ak4642_i2c_probe(struct i2c_client *i2c)
 {
 	struct device *dev = &i2c->dev;
-	struct device_node *np = dev->of_node;
-	const struct ak4642_drvdata *drvdata = NULL;
+	const struct ak4642_drvdata *drvdata;
 	struct regmap *regmap;
 	struct ak4642_priv *priv;
 	struct clk *mcko = NULL;
 
-	if (np) {
-		const struct of_device_id *of_id;
-
+	if (dev_fwnode(dev)) {
 		mcko = ak4642_of_parse_mcko(dev);
 		if (IS_ERR(mcko))
 			mcko = NULL;
-
-		of_id = of_match_device(ak4642_of_match, dev);
-		if (of_id)
-			drvdata = of_id->data;
-	} else {
-		const struct i2c_device_id *id =
-			i2c_match_id(ak4642_i2c_id, i2c);
-		drvdata = (const struct ak4642_drvdata *)id->driver_data;
 	}
 
-	if (!drvdata) {
-		dev_err(dev, "Unknown device type\n");
-		return -EINVAL;
-	}
+	drvdata = i2c_get_match_data(i2c);
+	if (!drvdata)
+		return dev_err_probe(dev, -EINVAL, "Unknown device type\n");
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -681,7 +667,7 @@ static const struct of_device_id ak4642_of_match[] = {
 	{ .compatible = "asahi-kasei,ak4642",	.data = &ak4642_drvdata},
 	{ .compatible = "asahi-kasei,ak4643",	.data = &ak4643_drvdata},
 	{ .compatible = "asahi-kasei,ak4648",	.data = &ak4648_drvdata},
-	{},
+	{}
 };
 MODULE_DEVICE_TABLE(of, ak4642_of_match);
 
@@ -689,7 +675,7 @@ static const struct i2c_device_id ak4642_i2c_id[] = {
 	{ "ak4642", (kernel_ulong_t)&ak4642_drvdata },
 	{ "ak4643", (kernel_ulong_t)&ak4643_drvdata },
 	{ "ak4648", (kernel_ulong_t)&ak4648_drvdata },
-	{ }
+	{}
 };
 MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id);
 
-- 
2.25.1