linux-kernel - [PATCH v2 1/1] i2c: imx: add some dev_err

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Message-ID: <20250408100300.556703-1-alexander.stein@ew.tq-group.com>
Date: Tue,  8 Apr 2025 12:02:59 +0200
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Oleksij Rempel <o.rempel@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Andi Shyti <andi.shyti@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>
Cc: Alexander Stein <alexander.stein@...tq-group.com>,
	linux-i2c@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Frank Li <Frank.Li@....com>
Subject: [PATCH v2 1/1] i2c: imx: add some dev_err_probe calls

Add corresponding error messages if DMA channels are not available during
probe. Using dev_err_probe adds deferred probe messages as well.

Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
Reviewed-by: Frank Li <Frank.Li@....com>
---
Changes in v2:
* Improved commit message
* Collected Frank's R-b
* Put error message into a single line

 drivers/i2c/busses/i2c-imx.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 9e5d454d8318e..de01dfecb16e6 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -1711,11 +1711,11 @@ static int i2c_imx_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return irq;
+		return dev_err_probe(&pdev->dev, irq, "can't get IRQ\n");
 
 	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(base))
-		return PTR_ERR(base);
+		return dev_err_probe(&pdev->dev, PTR_ERR(base), "can't get IO memory\n");
 
 	phy_addr = (dma_addr_t)res->start;
 	i2c_imx = devm_kzalloc(&pdev->dev, sizeof(*i2c_imx), GFP_KERNEL);
@@ -1810,13 +1810,15 @@ static int i2c_imx_probe(struct platform_device *pdev)
 	 */
 	ret = i2c_imx_dma_request(i2c_imx, phy_addr);
 	if (ret) {
-		if (ret == -EPROBE_DEFER)
+		if (ret == -EPROBE_DEFER) {
+			dev_err_probe(&pdev->dev, ret, "can't get DMA channels\n");
 			goto clk_notifier_unregister;
-		else if (ret == -ENODEV)
+		} else if (ret == -ENODEV) {
 			dev_dbg(&pdev->dev, "Only use PIO mode\n");
-		else
+		} else {
 			dev_warn(&pdev->dev, "Failed to setup DMA (%pe), only use PIO mode\n",
 				 ERR_PTR(ret));
+		}
 	}
 
 	/* Add I2C adapter */
-- 
2.43.0