[PATCH] ASoC: fsl: imx-sgtl5000: release codec clock right after reading its rate

[Valerio Setti]

The 'codec_clk' is only used in 'probe' to read its rate, which is then
cached in clk_frequency and used by 'imx_sgtl5000_dai_init()'. Holding the
clk until 'remove()' serves no purpose.

Release the clock right after reading its rate. This allows turning
'codec_clk' into a local variable, simplifying the probe error path and
dropping the 'remove()' callback, which has nothing left to do.

Signed-off-by: Valerio Setti <vsetti at baylibre.com>
---
While reviewing [1] I realized that the driver could be simplified a bit.
'codec_clk' is only used in the 'probe()' function with 'clk_get_rate()',
so it can be a local variable there. Also it must be put when no more
used, still in the 'probe()' function.
This allows to remove 'imx_sgtl5000_remove()'.

This patch does not depend on [1] and they are addressing different things.
The two should apply cleanly on 7.4-rc1.

[1] https://lore.kernel.org/all/20261104022815.1484320-1-vulab@iscas.ac.cn/
---
 sound/soc/fsl/imx-sgtl5000.c | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/sound/soc/fsl/imx-sgtl5000.c b/sound/soc/fsl/imx-sgtl5000.c
index 8bcf54ef709e..032ea3e066bd 100644
--- a/sound/soc/fsl/imx-sgtl5000.c
+++ b/sound/soc/fsl/imx-sgtl5000.c
@@ -20,7 +20,6 @@ struct imx_sgtl5000_data {
 	struct snd_soc_card card;
 	char codec_dai_name[DAI_NAME_SIZE];
 	char platform_name[DAI_NAME_SIZE];
-	struct clk *codec_clk;
 	unsigned int clk_frequency;
 };
 
@@ -54,8 +53,9 @@ static int imx_sgtl5000_probe(struct platform_device *pdev)
 	struct device_node *ssi_np, *codec_np;
 	struct platform_device *ssi_pdev;
 	struct i2c_client *codec_dev;
-	struct imx_sgtl5000_data *data = NULL;
+	struct imx_sgtl5000_data *data;
 	struct snd_soc_dai_link_component *comp;
+	struct clk *codec_clk;
 	int int_port, ext_port;
 	int ret;
 
@@ -129,13 +129,14 @@ static int imx_sgtl5000_probe(struct platform_device *pdev)
 		goto put_device;
 	}
 
-	data->codec_clk = clk_get(&codec_dev->dev, NULL);
-	if (IS_ERR(data->codec_clk)) {
-		ret = PTR_ERR(data->codec_clk);
+	codec_clk = clk_get(&codec_dev->dev, NULL);
+	if (IS_ERR(codec_clk)) {
+		ret = PTR_ERR(codec_clk);
 		goto put_device;
 	}
 
-	data->clk_frequency = clk_get_rate(data->codec_clk);
+	data->clk_frequency = clk_get_rate(codec_clk);
+	clk_put(codec_clk);
 
 	data->dai.cpus		= &comp[0];
 	data->dai.codecs	= &comp[1];
@@ -185,22 +186,12 @@ static int imx_sgtl5000_probe(struct platform_device *pdev)
 put_device:
 	put_device(&codec_dev->dev);
 fail:
-	if (data && !IS_ERR(data->codec_clk))
-		clk_put(data->codec_clk);
 	of_node_put(ssi_np);
 	of_node_put(codec_np);
 
 	return ret;
 }
 
-static void imx_sgtl5000_remove(struct platform_device *pdev)
-{
-	struct snd_soc_card *card = platform_get_drvdata(pdev);
-	struct imx_sgtl5000_data *data = snd_soc_card_get_drvdata(card);
-
-	clk_put(data->codec_clk);
-}
-
 static const struct of_device_id imx_sgtl5000_dt_ids[] = {
 	{ .compatible = "fsl,imx-audio-sgtl5000", },
 	{ /* sentinel */ }
@@ -214,7 +205,6 @@ static struct platform_driver imx_sgtl5000_driver = {
 		.of_match_table = imx_sgtl5000_dt_ids,
 	},
 	.probe = imx_sgtl5000_probe,
-	.remove = imx_sgtl5000_remove,
 };
 module_platform_driver(imx_sgtl5000_driver);
 

---
base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
change-id: 20261104-imx-sgtl5000-cleanup-371e704e5de6

Best regards,
--  
Valerio Setti <vsetti at baylibre.com>