[PATCHv3] ASoC: xilinx: formatter_pcm: use more devm in probe

[Rosen Penev <rosenp@gmail.com>]

Use devm_clk_get_enabled() to let the clock be enabled automatically
and cleaned up on unbind, dropping the manual clk_prepare_enable() and
clk_disable_unprepare() calls in probe and remove. As a result, move the
clk struct member into probe, which is the only place it's used.

Simplify the probe error paths by returning directly instead of
jumping to clk_err, and use devm_snd_soc_register_component() return
value directly. Also remove error message from ioremap as it throws one
itself. Same with devm_request_irq().

Assisted-by: opencode:deepseek-v4-flash-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
---
 v3: rebase.
 v2: add signed-off-by. Further clean up some stuff.
 sound/soc/xilinx/xlnx_formatter_pcm.c | 71 ++++++++-------------------
 1 file changed, 20 insertions(+), 51 deletions(-)

diff --git a/sound/soc/xilinx/xlnx_formatter_pcm.c b/sound/soc/xilinx/xlnx_formatter_pcm.c
index 3d6f1e4046d8..5f63fb28ea5f 100644
--- a/sound/soc/xilinx/xlnx_formatter_pcm.c
+++ b/sound/soc/xilinx/xlnx_formatter_pcm.c
@@ -82,7 +82,6 @@ struct xlnx_pcm_drv_data {
 	int mm2s_irq;
 	struct snd_pcm_substream *play_stream;
 	struct snd_pcm_substream *capture_stream;
-	struct clk *axi_clk;
 	unsigned int sysclk;
 };
 
@@ -596,30 +595,19 @@ static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
 	u32 val;
 	struct xlnx_pcm_drv_data *aud_drv_data;
 	struct device *dev = &pdev->dev;
+	struct clk *axi_clk;
+
+	axi_clk = devm_clk_get_enabled(dev, "s_axi_lite_aclk");
+	if (IS_ERR(axi_clk))
+		return dev_err_probe(dev, PTR_ERR(axi_clk), "failed to get s_axi_lite_aclk");
 
 	aud_drv_data = devm_kzalloc(dev, sizeof(*aud_drv_data), GFP_KERNEL);
 	if (!aud_drv_data)
 		return -ENOMEM;
 
-	aud_drv_data->axi_clk = devm_clk_get(dev, "s_axi_lite_aclk");
-	if (IS_ERR(aud_drv_data->axi_clk)) {
-		ret = PTR_ERR(aud_drv_data->axi_clk);
-		dev_err(dev, "failed to get s_axi_lite_aclk(%d)\n", ret);
-		return ret;
-	}
-	ret = clk_prepare_enable(aud_drv_data->axi_clk);
-	if (ret) {
-		dev_err(dev,
-			"failed to enable s_axi_lite_aclk(%d)\n", ret);
-		return ret;
-	}
-
 	aud_drv_data->mmio = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(aud_drv_data->mmio)) {
-		dev_err(dev, "audio formatter ioremap failed\n");
-		ret = PTR_ERR(aud_drv_data->mmio);
-		goto clk_err;
-	}
+	if (IS_ERR(aud_drv_data->mmio))
+		return PTR_ERR(aud_drv_data->mmio);
 
 	val = readl(aud_drv_data->mmio + XLNX_AUD_CORE_CONFIG);
 	if (val & AUD_CFG_MM2S_MASK) {
@@ -628,7 +616,7 @@ static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
 					       XLNX_MM2S_OFFSET);
 		if (ret) {
 			dev_err(dev, "audio formatter reset failed\n");
-			goto clk_err;
+			return ret;
 		}
 		xlnx_formatter_disable_irqs(aud_drv_data->mmio +
 					    XLNX_MM2S_OFFSET,
@@ -636,17 +624,14 @@ static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
 
 		aud_drv_data->mm2s_irq = platform_get_irq_byname(pdev,
 								 "irq_mm2s");
-		if (aud_drv_data->mm2s_irq < 0) {
-			ret = aud_drv_data->mm2s_irq;
-			goto clk_err;
-		}
+		if (aud_drv_data->mm2s_irq < 0)
+			return aud_drv_data->mm2s_irq;
+
 		ret = devm_request_irq(dev, aud_drv_data->mm2s_irq,
 				       xlnx_mm2s_irq_handler, 0,
 				       "xlnx_formatter_pcm_mm2s_irq", aud_drv_data);
-		if (ret) {
-			dev_err(dev, "xlnx audio mm2s irq request failed\n");
-			goto clk_err;
-		}
+		if (ret)
+			return ret;
 	}
 	if (val & AUD_CFG_S2MM_MASK) {
 		aud_drv_data->s2mm_presence = true;
@@ -654,7 +639,7 @@ static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
 					       XLNX_S2MM_OFFSET);
 		if (ret) {
 			dev_err(dev, "audio formatter reset failed\n");
-			goto clk_err;
+			return ret;
 		}
 		xlnx_formatter_disable_irqs(aud_drv_data->mmio +
 					    XLNX_S2MM_OFFSET,
@@ -662,34 +647,20 @@ static int xlnx_formatter_pcm_probe(struct platform_device *pdev)
 
 		aud_drv_data->s2mm_irq = platform_get_irq_byname(pdev,
 								 "irq_s2mm");
-		if (aud_drv_data->s2mm_irq < 0) {
-			ret = aud_drv_data->s2mm_irq;
-			goto clk_err;
-		}
+		if (aud_drv_data->s2mm_irq < 0)
+			return aud_drv_data->s2mm_irq;
+
 		ret = devm_request_irq(dev, aud_drv_data->s2mm_irq,
 				       xlnx_s2mm_irq_handler, 0,
 				       "xlnx_formatter_pcm_s2mm_irq",
 				       aud_drv_data);
-		if (ret) {
-			dev_err(dev, "xlnx audio s2mm irq request failed\n");
-			goto clk_err;
-		}
+		if (ret)
+			return ret;
 	}
 
 	dev_set_drvdata(dev, aud_drv_data);
 
-	ret = devm_snd_soc_register_component(dev, &xlnx_asoc_component,
-					      NULL, 0);
-	if (ret) {
-		dev_err(dev, "pcm platform device register failed\n");
-		goto clk_err;
-	}
-
-	return 0;
-
-clk_err:
-	clk_disable_unprepare(aud_drv_data->axi_clk);
-	return ret;
+	return devm_snd_soc_register_component(dev, &xlnx_asoc_component, NULL, 0);
 }
 
 static void xlnx_formatter_pcm_remove(struct platform_device *pdev)
@@ -706,8 +677,6 @@ static void xlnx_formatter_pcm_remove(struct platform_device *pdev)
 
 	if (ret)
 		dev_err(&pdev->dev, "audio formatter reset failed\n");
-
-	clk_disable_unprepare(adata->axi_clk);
 }
 
 static const struct of_device_id xlnx_formatter_pcm_of_match[] = {
-- 
2.55.0