[PATCH 00/10] i2c: Replace dev_err() with dev_err_probe()

[PATCH 00/10] i2c: Replace dev_err() with dev_err_probe()

[Atharv Dubey]

This patch series replaces dev_err() with dev_err_probe() in the probe() 
functions of each module. 

This simplifies the code and improves logs.

---
This Patch series was intially sent out by Encrio[1],  
this series is an effort to get it reviewed and upstream 
it. 
 
[1]: https://lore.kernel.org/all/20250520194400.341079-3-e.zanda1@gmail.com/t/#u

---
Enrico Zanda (10):
      i2c: tiny-usb: Replace dev_err() with dev_err_probe() in probe function
      i2c: tegra: Replace dev_err() with dev_err_probe() in probe function
      i2c: sun6i-p2wi: Replace dev_err() with dev_err_probe() in probe function
      i2c: stm32f7: Replace dev_err() with dev_err_probe() in probe function
      i2c: stm32f4: Replace dev_err() with dev_err_probe() in probe function
      i2c: stm32: Replace dev_err() with dev_err_probe() in probe function
      i2c: st: Replace dev_err() with dev_err_probe() in probe function
      i2c: sprd: Replace dev_err() with dev_err_probe() in probe function
      i2c: sis96x: Replace dev_err() with dev_err_probe() in probe function
      i2c: sis630: Replace dev_err() with dev_err_probe() in probe function

 drivers/i2c/busses/i2c-sis630.c     | 31 +++++++--------
 drivers/i2c/busses/i2c-sis96x.c     | 30 +++++++-------
 drivers/i2c/busses/i2c-sprd.c       | 13 +++----
 drivers/i2c/busses/i2c-st.c         | 34 +++++++---------
 drivers/i2c/busses/i2c-stm32.c      |  4 +-
 drivers/i2c/busses/i2c-stm32f4.c    | 53 ++++++++++---------------
 drivers/i2c/busses/i2c-stm32f7.c    | 78 ++++++++++++++-----------------------
 drivers/i2c/busses/i2c-sun6i-p2wi.c | 55 ++++++++++----------------
 drivers/i2c/busses/i2c-tegra.c      | 12 +++---
 drivers/i2c/busses/i2c-tiny-usb.c   |  5 +--
 10 files changed, 127 insertions(+), 188 deletions(-)
---
base-commit: c612261bedd6bbab7109f798715e449c9d20ff2f
change-id: 20260324-deverr-4b0b0e50195c

Best regards,
-- 
Atharv Dubey <atharvd440@gmail.com>

[PATCH 01/10] i2c: tiny-usb: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-tiny-usb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c
index 9ef495f88ef2..0637c71126f9 100644
--- a/drivers/i2c/busses/i2c-tiny-usb.c
+++ b/drivers/i2c/busses/i2c-tiny-usb.c
@@ -260,9 +260,8 @@ static int i2c_tiny_usb_probe(struct usb_interface *interface,
 		 dev->usb_dev->bus->busnum, dev->usb_dev->devnum);
 
 	if (usb_write(&dev->adapter, CMD_SET_DELAY, delay, 0, NULL, 0) != 0) {
-		dev_err(&dev->adapter.dev,
-			"failure setting delay to %dus\n", delay);
-		retval = -EIO;
+		retval = dev_err_probe(&dev->adapter.dev, -EIO,
+				       "failure setting delay to %dus\n", delay);
 		goto error;
 	}
 

-- 
2.43.0

[PATCH 02/10] i2c: tegra: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-tegra.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index bec619b9af4e..51d15fca82fc 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -575,8 +575,8 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
 	dma_buf = dma_alloc_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size,
 				     &dma_phys, GFP_KERNEL | __GFP_NOWARN);
 	if (!dma_buf) {
-		dev_err(i2c_dev->dev, "failed to allocate DMA buffer\n");
-		err = -ENOMEM;
+		err = dev_err_probe(i2c_dev->dev, -ENOMEM,
+				    "failed to allocate DMA buffer\n");
 		goto err_out;
 	}
 
@@ -588,8 +588,8 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
 err_out:
 	tegra_i2c_release_dma(i2c_dev);
 	if (err != -EPROBE_DEFER) {
-		dev_err(i2c_dev->dev, "cannot use DMA: %d\n", err);
-		dev_err(i2c_dev->dev, "falling back to PIO\n");
+		dev_err_probe(i2c_dev->dev, err,
+			      "cannot use DMA, falling back to PIO\n");
 		return 0;
 	}
 
@@ -1953,7 +1953,7 @@ static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev)
 
 	err = clk_enable(i2c_dev->div_clk);
 	if (err) {
-		dev_err(i2c_dev->dev, "failed to enable div-clk: %d\n", err);
+		dev_err_probe(i2c_dev->dev, err, "failed to enable div-clk\n");
 		goto unprepare_clocks;
 	}
 
@@ -1979,7 +1979,7 @@ static int tegra_i2c_init_hardware(struct tegra_i2c_dev *i2c_dev)
 
 	ret = pm_runtime_get_sync(i2c_dev->dev);
 	if (ret < 0)
-		dev_err(i2c_dev->dev, "runtime resume failed: %d\n", ret);
+		dev_err_probe(i2c_dev->dev, ret, "runtime resume failed\n");
 	else
 		ret = tegra_i2c_init(i2c_dev);
 

-- 
2.43.0

[PATCH 03/10] i2c: sun6i-p2wi: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-sun6i-p2wi.c | 55 ++++++++++++++-----------------------
 1 file changed, 20 insertions(+), 35 deletions(-)

diff --git a/drivers/i2c/busses/i2c-sun6i-p2wi.c b/drivers/i2c/busses/i2c-sun6i-p2wi.c
index fb5280b8cf7f..dffbe776a195 100644
--- a/drivers/i2c/busses/i2c-sun6i-p2wi.c
+++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c
@@ -194,22 +194,16 @@ static int p2wi_probe(struct platform_device *pdev)
 	int ret;
 
 	of_property_read_u32(np, "clock-frequency", &clk_freq);
-	if (clk_freq > P2WI_MAX_FREQ) {
-		dev_err(dev,
-			"required clock-frequency (%u Hz) is too high (max = 6MHz)",
-			clk_freq);
-		return -EINVAL;
-	}
+	if (clk_freq > P2WI_MAX_FREQ)
+		return dev_err_probe(dev, -EINVAL,
+				     "required clock-frequency (%u Hz) is too high (max = 6MHz)",
+				     clk_freq);
 
-	if (clk_freq == 0) {
-		dev_err(dev, "clock-frequency is set to 0 in DT\n");
-		return -EINVAL;
-	}
+	if (clk_freq == 0)
+		return dev_err_probe(dev, -EINVAL, "clock-frequency is set to 0 in DT\n");
 
-	if (of_get_child_count(np) > 1) {
-		dev_err(dev, "P2WI only supports one target device\n");
-		return -EINVAL;
-	}
+	if (of_get_child_count(np) > 1)
+		return dev_err_probe(dev, -EINVAL, "P2WI only supports one target device\n");
 
 	p2wi = devm_kzalloc(dev, sizeof(struct p2wi), GFP_KERNEL);
 	if (!p2wi)
@@ -226,11 +220,9 @@ static int p2wi_probe(struct platform_device *pdev)
 	childnp = of_get_next_available_child(np, NULL);
 	if (childnp) {
 		ret = of_property_read_u32(childnp, "reg", &target_addr);
-		if (ret) {
-			dev_err(dev, "invalid target address on node %pOF\n",
-				childnp);
-			return -EINVAL;
-		}
+		if (ret)
+			return dev_err_probe(dev, -EINVAL,
+					     "invalid target address on node %pOF\n", childnp);
 
 		p2wi->target_addr = target_addr;
 	}
@@ -245,26 +237,20 @@ static int p2wi_probe(struct platform_device *pdev)
 		return irq;
 
 	p2wi->clk = devm_clk_get_enabled(dev, NULL);
-	if (IS_ERR(p2wi->clk)) {
-		ret = PTR_ERR(p2wi->clk);
-		dev_err(dev, "failed to enable clk: %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(p2wi->clk))
+		return dev_err_probe(dev, PTR_ERR(p2wi->clk),
+				     "failed to enable clk\n");
 
 	parent_clk_freq = clk_get_rate(p2wi->clk);
 
 	p2wi->rstc = devm_reset_control_get_exclusive(dev, NULL);
-	if (IS_ERR(p2wi->rstc)) {
-		dev_err(dev, "failed to retrieve reset controller: %pe\n",
-			p2wi->rstc);
-		return PTR_ERR(p2wi->rstc);
-	}
+	if (IS_ERR(p2wi->rstc))
+		return dev_err_probe(dev, PTR_ERR(p2wi->rstc),
+				     "failed to retrieve reset controller\n");
 
 	ret = reset_control_deassert(p2wi->rstc);
-	if (ret) {
-		dev_err(dev, "failed to deassert reset line: %d\n", ret);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to deassert reset line\n");
 
 	init_completion(&p2wi->complete);
 	p2wi->adapter.dev.parent = dev;
@@ -276,8 +262,7 @@ static int p2wi_probe(struct platform_device *pdev)
 
 	ret = devm_request_irq(dev, irq, p2wi_interrupt, 0, pdev->name, p2wi);
 	if (ret) {
-		dev_err(dev, "can't register interrupt handler irq%d: %d\n",
-			irq, ret);
+		dev_err_probe(dev, ret, "can't register interrupt handler irq%d\n", irq);
 		goto err_reset_assert;
 	}
 

-- 
2.43.0

[PATCH 04/10] i2c: stm32f7: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 78 ++++++++++++++++------------------------
 1 file changed, 30 insertions(+), 48 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 70cb5822bf17..e7cc7f0fb56c 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -481,28 +481,22 @@ static int stm32f7_i2c_compute_timing(struct stm32f7_i2c_dev *i2c_dev,
 	int ret = 0;
 
 	specs = stm32f7_get_specs(setup->speed_freq);
-	if (specs == ERR_PTR(-EINVAL)) {
-		dev_err(i2c_dev->dev, "speed out of bound {%d}\n",
-			setup->speed_freq);
-		return -EINVAL;
-	}
+	if (specs == ERR_PTR(-EINVAL))
+		return dev_err_probe(i2c_dev->dev, -EINVAL, "speed out of bound {%d}\n",
+				     setup->speed_freq);
 
 	if ((setup->rise_time > specs->rise_max) ||
-	    (setup->fall_time > specs->fall_max)) {
-		dev_err(i2c_dev->dev,
-			"timings out of bound Rise{%d>%d}/Fall{%d>%d}\n",
-			setup->rise_time, specs->rise_max,
-			setup->fall_time, specs->fall_max);
-		return -EINVAL;
-	}
+	    (setup->fall_time > specs->fall_max))
+		return dev_err_probe(i2c_dev->dev, -EINVAL,
+				     "timings out of bound Rise{%d>%d}/Fall{%d>%d}\n",
+				     setup->rise_time, specs->rise_max,
+				     setup->fall_time, specs->fall_max);
 
 	i2c_dev->dnf = DIV_ROUND_CLOSEST(i2c_dev->dnf_dt, i2cclk);
-	if (i2c_dev->dnf > STM32F7_I2C_DNF_MAX) {
-		dev_err(i2c_dev->dev,
-			"DNF out of bound %d/%d\n",
-			i2c_dev->dnf * i2cclk, STM32F7_I2C_DNF_MAX * i2cclk);
-		return -EINVAL;
-	}
+	if (i2c_dev->dnf > STM32F7_I2C_DNF_MAX)
+		return dev_err_probe(i2c_dev->dev, -EINVAL,
+				     "DNF out of bound %d/%d\n", i2c_dev->dnf * i2cclk,
+				     STM32F7_I2C_DNF_MAX * i2cclk);
 
 	/*  Analog and Digital Filters */
 	af_delay_min =
@@ -567,8 +561,7 @@ static int stm32f7_i2c_compute_timing(struct stm32f7_i2c_dev *i2c_dev,
 	}
 
 	if (list_empty(&solutions)) {
-		dev_err(i2c_dev->dev, "no Prescaler solution\n");
-		ret = -EPERM;
+		ret = dev_err_probe(i2c_dev->dev, -EPERM, "no Prescaler solution\n");
 		goto exit;
 	}
 
@@ -624,8 +617,7 @@ static int stm32f7_i2c_compute_timing(struct stm32f7_i2c_dev *i2c_dev,
 	}
 
 	if (!s) {
-		dev_err(i2c_dev->dev, "no solution at all\n");
-		ret = -EPERM;
+		ret = dev_err_probe(i2c_dev->dev, -EPERM, "no solution at all\n");
 		goto exit;
 	}
 
@@ -674,11 +666,9 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev,
 
 	i2c_parse_fw_timings(i2c_dev->dev, t, false);
 
-	if (t->bus_freq_hz > I2C_MAX_FAST_MODE_PLUS_FREQ) {
-		dev_err(i2c_dev->dev, "Invalid bus speed (%i>%i)\n",
-			t->bus_freq_hz, I2C_MAX_FAST_MODE_PLUS_FREQ);
-		return -EINVAL;
-	}
+	if (t->bus_freq_hz > I2C_MAX_FAST_MODE_PLUS_FREQ)
+		return dev_err_probe(i2c_dev->dev, -EINVAL, "Invalid bus speed (%i>%i)\n",
+				     t->bus_freq_hz, I2C_MAX_FAST_MODE_PLUS_FREQ);
 
 	setup->speed_freq = t->bus_freq_hz;
 	i2c_dev->setup.rise_time = t->scl_rise_ns;
@@ -686,10 +676,8 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev,
 	i2c_dev->dnf_dt = t->digital_filter_width_ns;
 	setup->clock_src = clk_get_rate(i2c_dev->clk);
 
-	if (!setup->clock_src) {
-		dev_err(i2c_dev->dev, "clock rate is 0\n");
-		return -EINVAL;
-	}
+	if (!setup->clock_src)
+		return dev_err_probe(i2c_dev->dev, -EINVAL, "clock rate is 0\n");
 
 	if (!of_property_read_bool(i2c_dev->dev->of_node, "i2c-digital-filter"))
 		i2c_dev->dnf_dt = STM32F7_I2C_DNF_DEFAULT;
@@ -698,8 +686,8 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev,
 		ret = stm32f7_i2c_compute_timing(i2c_dev, setup,
 						 &i2c_dev->timing);
 		if (ret) {
-			dev_err(i2c_dev->dev,
-				"failed to compute I2C timings.\n");
+			dev_err_probe(i2c_dev->dev, ret,
+				      "failed to compute I2C timings.\n");
 			if (setup->speed_freq <= I2C_MAX_STANDARD_MODE_FREQ)
 				break;
 			setup->speed_freq =
@@ -710,10 +698,8 @@ static int stm32f7_i2c_setup_timing(struct stm32f7_i2c_dev *i2c_dev,
 		}
 	} while (ret);
 
-	if (ret) {
-		dev_err(i2c_dev->dev, "Impossible to compute I2C timings.\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(i2c_dev->dev, ret, "Impossible to compute I2C timings.\n");
 
 	i2c_dev->analog_filter = of_property_read_bool(i2c_dev->dev->of_node,
 						       "i2c-analog-filter");
@@ -2175,10 +2161,8 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	setup = of_device_get_match_data(&pdev->dev);
-	if (!setup) {
-		dev_err(&pdev->dev, "Can't get device data\n");
-		return -ENODEV;
-	}
+	if (!setup)
+		return dev_err_probe(&pdev->dev, -ENODEV, "Can't get device data\n");
 	i2c_dev->setup = *setup;
 
 	i2c_dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
@@ -2279,7 +2263,7 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 
 		ret = dev_pm_set_wake_irq(i2c_dev->dev, irq_event);
 		if (ret) {
-			dev_err(i2c_dev->dev, "Failed to set wake up irq\n");
+			dev_err_probe(i2c_dev->dev, ret, "Failed to set wake up irq\n");
 			goto clr_wakeup_capable;
 		}
 	}
@@ -2305,9 +2289,8 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 	if (i2c_dev->smbus_mode) {
 		ret = stm32f7_i2c_enable_smbus_host(i2c_dev);
 		if (ret) {
-			dev_err(i2c_dev->dev,
-				"failed to enable SMBus Host-Notify protocol (%d)\n",
-				ret);
+			dev_err_probe(i2c_dev->dev, ret,
+				      "failed to enable SMBus Host-Notify protocol\n");
 			goto i2c_adapter_remove;
 		}
 	}
@@ -2315,9 +2298,8 @@ static int stm32f7_i2c_probe(struct platform_device *pdev)
 	if (of_property_read_bool(pdev->dev.of_node, "smbus-alert")) {
 		ret = stm32f7_i2c_enable_smbus_alert(i2c_dev);
 		if (ret) {
-			dev_err(i2c_dev->dev,
-				"failed to enable SMBus alert protocol (%d)\n",
-				ret);
+			dev_err_probe(i2c_dev->dev, ret,
+				      "failed to enable SMBus alert protocol\n");
 			goto i2c_disable_smbus_host;
 		}
 	}

-- 
2.43.0

[PATCH 05/10] i2c: stm32f4: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-stm32f4.c | 53 ++++++++++++++++------------------------
 1 file changed, 21 insertions(+), 32 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32f4.c b/drivers/i2c/busses/i2c-stm32f4.c
index b3d56d0aa9d0..44e8b04962bb 100644
--- a/drivers/i2c/busses/i2c-stm32f4.c
+++ b/drivers/i2c/busses/i2c-stm32f4.c
@@ -163,11 +163,9 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev)
 		 * to hardware limitation
 		 */
 		if (freq < STM32F4_I2C_MIN_STANDARD_FREQ ||
-		    freq > STM32F4_I2C_MAX_FREQ) {
-			dev_err(i2c_dev->dev,
-				"bad parent clk freq for standard mode\n");
-			return -EINVAL;
-		}
+		    freq > STM32F4_I2C_MAX_FREQ)
+			return dev_err_probe(i2c_dev->dev, -EINVAL,
+					     "bad parent clk freq for standard mode\n");
 	} else {
 		/*
 		 * To be as close as possible to 400 kHz, the parent clk
@@ -175,11 +173,9 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev)
 		 * maximum value of 46 MHz due to hardware limitation
 		 */
 		if (freq < STM32F4_I2C_MIN_FAST_FREQ ||
-		    freq > STM32F4_I2C_MAX_FREQ) {
-			dev_err(i2c_dev->dev,
-				"bad parent clk freq for fast mode\n");
-			return -EINVAL;
-		}
+		    freq > STM32F4_I2C_MAX_FREQ)
+			return dev_err_probe(i2c_dev->dev, -EINVAL,
+					     "bad parent clk freq for fast mode\n");
 	}
 
 	cr2 |= STM32F4_I2C_CR2_FREQ(freq);
@@ -772,22 +768,19 @@ static int stm32f4_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c_dev->base);
 
 	irq_event = irq_of_parse_and_map(np, 0);
-	if (!irq_event) {
-		dev_err(&pdev->dev, "IRQ event missing or invalid\n");
-		return -EINVAL;
-	}
+	if (!irq_event)
+		return dev_err_probe(&pdev->dev, -EINVAL,
+				     "IRQ event missing or invalid\n");
 
 	irq_error = irq_of_parse_and_map(np, 1);
-	if (!irq_error) {
-		dev_err(&pdev->dev, "IRQ error missing or invalid\n");
-		return -EINVAL;
-	}
+	if (!irq_error)
+		return dev_err_probe(&pdev->dev, -EINVAL,
+				     "IRQ error missing or invalid\n");
 
 	i2c_dev->clk = devm_clk_get_enabled(&pdev->dev, NULL);
-	if (IS_ERR(i2c_dev->clk)) {
-		dev_err(&pdev->dev, "Failed to enable clock\n");
-		return PTR_ERR(i2c_dev->clk);
-	}
+	if (IS_ERR(i2c_dev->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(i2c_dev->clk),
+				     "Failed to enable clock\n");
 
 	rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(rst))
@@ -807,19 +800,15 @@ static int stm32f4_i2c_probe(struct platform_device *pdev)
 
 	ret = devm_request_irq(&pdev->dev, irq_event, stm32f4_i2c_isr_event, 0,
 			       pdev->name, i2c_dev);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to request irq event %i\n",
-			irq_event);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Failed to request irq event %i\n", irq_event);
 
 	ret = devm_request_irq(&pdev->dev, irq_error, stm32f4_i2c_isr_error, 0,
 			       pdev->name, i2c_dev);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to request irq error %i\n",
-			irq_error);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Failed to request irq error %i\n", irq_error);
 
 	ret = stm32f4_i2c_hw_config(i2c_dev);
 	if (ret)

-- 
2.43.0

[PATCH 06/10] i2c: stm32: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-stm32.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-stm32.c b/drivers/i2c/busses/i2c-stm32.c
index becf8977979f..064e47d6c96f 100644
--- a/drivers/i2c/busses/i2c-stm32.c
+++ b/drivers/i2c/busses/i2c-stm32.c
@@ -39,7 +39,7 @@ struct stm32_i2c_dma *stm32_i2c_dma_request(struct device *dev,
 	dma_sconfig.direction = DMA_MEM_TO_DEV;
 	ret = dmaengine_slave_config(dma->chan_tx, &dma_sconfig);
 	if (ret < 0) {
-		dev_err(dev, "can't configure tx channel\n");
+		dev_err_probe(dev, ret, "can't configure tx channel\n");
 		goto fail_tx;
 	}
 
@@ -60,7 +60,7 @@ struct stm32_i2c_dma *stm32_i2c_dma_request(struct device *dev,
 	dma_sconfig.direction = DMA_DEV_TO_MEM;
 	ret = dmaengine_slave_config(dma->chan_rx, &dma_sconfig);
 	if (ret < 0) {
-		dev_err(dev, "can't configure rx channel\n");
+		dev_err_probe(dev, ret, "can't configure rx channel\n");
 		goto fail_rx;
 	}
 

-- 
2.43.0

[PATCH 07/10] i2c: st: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-st.c | 34 ++++++++++++++--------------------
 1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/drivers/i2c/busses/i2c-st.c b/drivers/i2c/busses/i2c-st.c
index 751ea421caaf..3f89c2145741 100644
--- a/drivers/i2c/busses/i2c-st.c
+++ b/drivers/i2c/busses/i2c-st.c
@@ -775,17 +775,15 @@ static int st_i2c_of_get_deglitch(struct device_node *np,
 
 	ret = of_property_read_u32(np, "st,i2c-min-scl-pulse-width-us",
 			&i2c_dev->scl_min_width_us);
-	if ((ret == -ENODATA) || (ret == -EOVERFLOW)) {
-		dev_err(i2c_dev->dev, "st,i2c-min-scl-pulse-width-us invalid\n");
-		return ret;
-	}
+	if ((ret == -ENODATA) || (ret == -EOVERFLOW))
+		return dev_err_probe(i2c_dev->dev, ret,
+				     "st,i2c-min-scl-pulse-width-us invalid\n");
 
 	ret = of_property_read_u32(np, "st,i2c-min-sda-pulse-width-us",
 			&i2c_dev->sda_min_width_us);
-	if ((ret == -ENODATA) || (ret == -EOVERFLOW)) {
-		dev_err(i2c_dev->dev, "st,i2c-min-sda-pulse-width-us invalid\n");
-		return ret;
-	}
+	if ((ret == -ENODATA) || (ret == -EOVERFLOW))
+		return dev_err_probe(i2c_dev->dev, ret,
+				     "st,i2c-min-sda-pulse-width-us invalid\n");
 
 	return 0;
 }
@@ -808,16 +806,13 @@ static int st_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(i2c_dev->base);
 
 	i2c_dev->irq = irq_of_parse_and_map(np, 0);
-	if (!i2c_dev->irq) {
-		dev_err(&pdev->dev, "IRQ missing or invalid\n");
-		return -EINVAL;
-	}
+	if (!i2c_dev->irq)
+		return dev_err_probe(&pdev->dev, -EINVAL, "IRQ missing or invalid\n");
 
 	i2c_dev->clk = of_clk_get_by_name(np, "ssc");
-	if (IS_ERR(i2c_dev->clk)) {
-		dev_err(&pdev->dev, "Unable to request clock\n");
-		return PTR_ERR(i2c_dev->clk);
-	}
+	if (IS_ERR(i2c_dev->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(i2c_dev->clk),
+				     "Unable to request clock\n");
 
 	i2c_dev->mode = I2C_MODE_STANDARD;
 	ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
@@ -829,10 +824,9 @@ static int st_i2c_probe(struct platform_device *pdev)
 	ret = devm_request_threaded_irq(&pdev->dev, i2c_dev->irq,
 			NULL, st_i2c_isr_thread,
 			IRQF_ONESHOT, pdev->name, i2c_dev);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to request irq %i\n", i2c_dev->irq);
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Failed to request irq %i\n", i2c_dev->irq);
 
 	pinctrl_pm_select_default_state(i2c_dev->dev);
 	/* In case idle state available, select it */

-- 
2.43.0

[PATCH 08/10] i2c: sprd: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-sprd.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c
index 1b490525d8dd..7b321a956fca 100644
--- a/drivers/i2c/busses/i2c-sprd.c
+++ b/drivers/i2c/busses/i2c-sprd.c
@@ -469,11 +469,10 @@ static int sprd_i2c_clk_init(struct sprd_i2c *i2c_dev)
 		i2c_dev->adap.nr, i2c_dev->src_clk);
 
 	i2c_dev->clk = devm_clk_get(i2c_dev->dev, "enable");
-	if (IS_ERR(i2c_dev->clk)) {
-		dev_err(i2c_dev->dev, "i2c%d can't get the enable clock\n",
-			i2c_dev->adap.nr);
-		return PTR_ERR(i2c_dev->clk);
-	}
+	if (IS_ERR(i2c_dev->clk))
+		return dev_err_probe(i2c_dev->dev, PTR_ERR(i2c_dev->clk),
+				     "i2c%d can't get the enable clock\n",
+				     i2c_dev->adap.nr);
 
 	return 0;
 }
@@ -548,13 +547,13 @@ static int sprd_i2c_probe(struct platform_device *pdev)
 		IRQF_NO_SUSPEND | IRQF_ONESHOT,
 		pdev->name, i2c_dev);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to request irq %d\n", i2c_dev->irq);
+		dev_err_probe(&pdev->dev, ret, "failed to request irq %d\n", i2c_dev->irq);
 		goto err_rpm_put;
 	}
 
 	ret = i2c_add_numbered_adapter(&i2c_dev->adap);
 	if (ret) {
-		dev_err(&pdev->dev, "add adapter failed\n");
+		dev_err_probe(&pdev->dev, ret, "add adapter failed\n");
 		goto err_rpm_put;
 	}
 

-- 
2.43.0

[PATCH 09/10] i2c: sis96x: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-sis96x.c | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index 77529dda6fcd..eee41dc9d706 100644
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -245,23 +245,19 @@ static int sis96x_probe(struct pci_dev *dev,
 	u16 ww = 0;
 	int retval;
 
-	if (sis96x_smbus_base) {
-		dev_err(&dev->dev, "Only one device supported.\n");
-		return -EBUSY;
-	}
+	if (sis96x_smbus_base)
+		return dev_err_probe(&dev->dev, -EBUSY, "Only one device supported.\n");
 
 	pci_read_config_word(dev, PCI_CLASS_DEVICE, &ww);
-	if (PCI_CLASS_SERIAL_SMBUS != ww) {
-		dev_err(&dev->dev, "Unsupported device class 0x%04x!\n", ww);
-		return -ENODEV;
-	}
+	if (ww != PCI_CLASS_SERIAL_SMBUS)
+		return dev_err_probe(&dev->dev, -ENODEV,
+				     "Unsupported device class 0x%04x!\n", ww);
 
 	sis96x_smbus_base = pci_resource_start(dev, SIS96x_BAR);
-	if (!sis96x_smbus_base) {
-		dev_err(&dev->dev, "SiS96x SMBus base address "
-			"not initialized!\n");
-		return -EINVAL;
-	}
+	if (!sis96x_smbus_base)
+		return dev_err_probe(&dev->dev, -EINVAL,
+				     "SiS96x SMBus base address not initialized!\n");
+
 	dev_info(&dev->dev, "SiS96x SMBus base address: 0x%04x\n",
 			sis96x_smbus_base);
 
@@ -272,9 +268,9 @@ static int sis96x_probe(struct pci_dev *dev,
 	/* Everything is happy, let's grab the memory and set things up. */
 	if (!request_region(sis96x_smbus_base, SMB_IOSIZE,
 			    sis96x_driver.name)) {
-		dev_err(&dev->dev, "SMBus registers 0x%04x-0x%04x "
-			"already in use!\n", sis96x_smbus_base,
-			sis96x_smbus_base + SMB_IOSIZE - 1);
+		dev_err_probe(&dev->dev, -EINVAL,
+			      "SMBus registers 0x%04x-0x%04x already in use!\n",
+			      sis96x_smbus_base, sis96x_smbus_base + SMB_IOSIZE - 1);
 
 		sis96x_smbus_base = 0;
 		return -EINVAL;
@@ -287,7 +283,7 @@ static int sis96x_probe(struct pci_dev *dev,
 		"SiS96x SMBus adapter at 0x%04x", sis96x_smbus_base);
 
 	if ((retval = i2c_add_adapter(&sis96x_adapter))) {
-		dev_err(&dev->dev, "Couldn't register adapter!\n");
+		dev_err_probe(&dev->dev, retval, "Couldn't register adapter!\n");
 		release_region(sis96x_smbus_base, SMB_IOSIZE);
 		sis96x_smbus_base = 0;
 	}

-- 
2.43.0

[PATCH 10/10] i2c: sis630: Replace dev_err() with dev_err_probe() in probe function

[Atharv Dubey]

From: Enrico Zanda <e.zanda1@gmail.com>

This simplifies the code while improving log.

Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
---
 drivers/i2c/busses/i2c-sis630.c | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index a19c3d251804..3d0638c2bc51 100644
--- a/drivers/i2c/busses/i2c-sis630.c
+++ b/drivers/i2c/busses/i2c-sis630.c
@@ -431,24 +431,23 @@ static int sis630_setup(struct pci_dev *sis630_dev)
 	   in acpi io space and read acpi base addr
 	*/
 	if (pci_read_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, &b)) {
-		dev_err(&sis630_dev->dev, "Error: Can't read bios ctl reg\n");
-		retval = -ENODEV;
+		retval = dev_err_probe(&sis630_dev->dev, -ENODEV,
+				       "Error: Can't read bios ctl reg\n");
 		goto exit;
 	}
 	/* if ACPI already enabled , do nothing */
 	if (!(b & 0x80) &&
 	    pci_write_config_byte(sis630_dev, SIS630_BIOS_CTL_REG, b | 0x80)) {
-		dev_err(&sis630_dev->dev, "Error: Can't enable ACPI\n");
-		retval = -ENODEV;
+		retval = dev_err_probe(&sis630_dev->dev, -ENODEV,
+				       "Error: Can't enable ACPI\n");
 		goto exit;
 	}
 
 	/* Determine the ACPI base address */
 	if (pci_read_config_word(sis630_dev,
 				 SIS630_ACPI_BASE_REG, &acpi_base)) {
-		dev_err(&sis630_dev->dev,
-			"Error: Can't determine ACPI base address\n");
-		retval = -ENODEV;
+		retval = dev_err_probe(&sis630_dev->dev, -ENODEV,
+				       "Error: Can't determine ACPI base address\n");
 		goto exit;
 	}
 
@@ -469,11 +468,10 @@ static int sis630_setup(struct pci_dev *sis630_dev)
 	/* Everything is happy, let's grab the memory and set things up. */
 	if (!request_region(smbus_base + SMB_STS, SIS630_SMB_IOREGION,
 			    sis630_driver.name)) {
-		dev_err(&sis630_dev->dev,
-			"I/O Region 0x%04x-0x%04x for SMBus already in use.\n",
-			smbus_base + SMB_STS,
-			smbus_base + SMB_STS + SIS630_SMB_IOREGION - 1);
-		retval = -EBUSY;
+		retval = dev_err_probe(&sis630_dev->dev, -EBUSY,
+				       "I/O Region 0x%04x-0x%04x for SMBus already in use.\n",
+				       smbus_base + SMB_STS,
+				       smbus_base + SMB_STS + SIS630_SMB_IOREGION - 1);
 		goto exit;
 	}
 
@@ -511,12 +509,9 @@ static int sis630_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	int ret;
 
-	if (sis630_setup(dev)) {
-		dev_err(&dev->dev,
-			"SIS630 compatible bus not detected, "
-			"module not inserted.\n");
-		return -ENODEV;
-	}
+	if (sis630_setup(dev))
+		return dev_err_probe(&dev->dev, -ENODEV,
+				     "Compatible bus not detected, module not inserted.\n");
 
 	/* set up the sysfs linkage to our parent device */
 	sis630_adapter.dev.parent = &dev->dev;

-- 
2.43.0

Re: [PATCH 02/10] i2c: tegra: Replace dev_err() with dev_err_probe() in probe function

[Jon Hunter]

On 24/03/2026 18:26, Atharv Dubey wrote:
> From: Enrico Zanda <e.zanda1@gmail.com>
> 
> This simplifies the code while improving log.
> 
> Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
> Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
> ---
>   drivers/i2c/busses/i2c-tegra.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
> index bec619b9af4e..51d15fca82fc 100644
> --- a/drivers/i2c/busses/i2c-tegra.c
> +++ b/drivers/i2c/busses/i2c-tegra.c
> @@ -575,8 +575,8 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
>   	dma_buf = dma_alloc_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size,
>   				     &dma_phys, GFP_KERNEL | __GFP_NOWARN);
>   	if (!dma_buf) {
> -		dev_err(i2c_dev->dev, "failed to allocate DMA buffer\n");
> -		err = -ENOMEM;
> +		err = dev_err_probe(i2c_dev->dev, -ENOMEM,
> +				    "failed to allocate DMA buffer\n");

So this will never be a probe defer, so why bother?

>   		goto err_out;
>   	}
>   
> @@ -588,8 +588,8 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev)
>   err_out:
>   	tegra_i2c_release_dma(i2c_dev);
>   	if (err != -EPROBE_DEFER) {
> -		dev_err(i2c_dev->dev, "cannot use DMA: %d\n", err);
> -		dev_err(i2c_dev->dev, "falling back to PIO\n");
> +		dev_err_probe(i2c_dev->dev, err,
> +			      "cannot use DMA, falling back to PIO\n");

This is not right.

>   		return 0;
>   	}
>   
> @@ -1953,7 +1953,7 @@ static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev)
>   
>   	err = clk_enable(i2c_dev->div_clk);
>   	if (err) {
> -		dev_err(i2c_dev->dev, "failed to enable div-clk: %d\n", err);
> +		dev_err_probe(i2c_dev->dev, err, "failed to enable div-clk\n");

We have already got the clock and so I don't think that this is needed 
either.

>   		goto unprepare_clocks;
>   	}
>   
> @@ -1979,7 +1979,7 @@ static int tegra_i2c_init_hardware(struct tegra_i2c_dev *i2c_dev)
>   
>   	ret = pm_runtime_get_sync(i2c_dev->dev);
>   	if (ret < 0)
> -		dev_err(i2c_dev->dev, "runtime resume failed: %d\n", ret);
> +		dev_err_probe(i2c_dev->dev, ret, "runtime resume failed\n");

I don't think that this is needed either.

>   	else
>   		ret = tegra_i2c_init(i2c_dev);
>   
> 

-- 
nvpublic

Re: [PATCH 03/10] i2c: sun6i-p2wi: Replace dev_err() with dev_err_probe() in probe function

[Chen-Yu Tsai]

On Wed, Mar 25, 2026 at 2:27 AM Atharv Dubey <atharvd440@gmail.com> wrote:
>
> From: Enrico Zanda <e.zanda1@gmail.com>
>
> This simplifies the code while improving log.
>
> Signed-off-by: Enrico Zanda <e.zanda1@gmail.com>
> Signed-off-by: Atharv Dubey <atharvd440@gmail.com>
> ---
>  drivers/i2c/busses/i2c-sun6i-p2wi.c | 55 ++++++++++++++-----------------------
>  1 file changed, 20 insertions(+), 35 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-sun6i-p2wi.c b/drivers/i2c/busses/i2c-sun6i-p2wi.c
> index fb5280b8cf7f..dffbe776a195 100644
> --- a/drivers/i2c/busses/i2c-sun6i-p2wi.c
> +++ b/drivers/i2c/busses/i2c-sun6i-p2wi.c
> @@ -194,22 +194,16 @@ static int p2wi_probe(struct platform_device *pdev)
>         int ret;
>
>         of_property_read_u32(np, "clock-frequency", &clk_freq);
> -       if (clk_freq > P2WI_MAX_FREQ) {
> -               dev_err(dev,
> -                       "required clock-frequency (%u Hz) is too high (max = 6MHz)",
> -                       clk_freq);
> -               return -EINVAL;
> -       }
> +       if (clk_freq > P2WI_MAX_FREQ)
> +               return dev_err_probe(dev, -EINVAL,
> +                                    "required clock-frequency (%u Hz) is too high (max = 6MHz)",
> +                                    clk_freq);
>
> -       if (clk_freq == 0) {
> -               dev_err(dev, "clock-frequency is set to 0 in DT\n");
> -               return -EINVAL;
> -       }
> +       if (clk_freq == 0)
> +               return dev_err_probe(dev, -EINVAL, "clock-frequency is set to 0 in DT\n");
>
> -       if (of_get_child_count(np) > 1) {
> -               dev_err(dev, "P2WI only supports one target device\n");
> -               return -EINVAL;
> -       }
> +       if (of_get_child_count(np) > 1)
> +               return dev_err_probe(dev, -EINVAL, "P2WI only supports one target device\n");
>
>         p2wi = devm_kzalloc(dev, sizeof(struct p2wi), GFP_KERNEL);
>         if (!p2wi)
> @@ -226,11 +220,9 @@ static int p2wi_probe(struct platform_device *pdev)
>         childnp = of_get_next_available_child(np, NULL);
>         if (childnp) {
>                 ret = of_property_read_u32(childnp, "reg", &target_addr);
> -               if (ret) {
> -                       dev_err(dev, "invalid target address on node %pOF\n",
> -                               childnp);
> -                       return -EINVAL;
> -               }
> +               if (ret)
> +                       return dev_err_probe(dev, -EINVAL,
> +                                            "invalid target address on node %pOF\n", childnp);
>
>                 p2wi->target_addr = target_addr;
>         }
> @@ -245,26 +237,20 @@ static int p2wi_probe(struct platform_device *pdev)
>                 return irq;
>
>         p2wi->clk = devm_clk_get_enabled(dev, NULL);
> -       if (IS_ERR(p2wi->clk)) {
> -               ret = PTR_ERR(p2wi->clk);
> -               dev_err(dev, "failed to enable clk: %d\n", ret);
> -               return ret;
> -       }
> +       if (IS_ERR(p2wi->clk))
> +               return dev_err_probe(dev, PTR_ERR(p2wi->clk),
> +                                    "failed to enable clk\n");
>
>         parent_clk_freq = clk_get_rate(p2wi->clk);
>
>         p2wi->rstc = devm_reset_control_get_exclusive(dev, NULL);
> -       if (IS_ERR(p2wi->rstc)) {
> -               dev_err(dev, "failed to retrieve reset controller: %pe\n",
> -                       p2wi->rstc);
> -               return PTR_ERR(p2wi->rstc);
> -       }
> +       if (IS_ERR(p2wi->rstc))
> +               return dev_err_probe(dev, PTR_ERR(p2wi->rstc),
> +                                    "failed to retrieve reset controller\n");
>
>         ret = reset_control_deassert(p2wi->rstc);
> -       if (ret) {
> -               dev_err(dev, "failed to deassert reset line: %d\n", ret);
> -               return ret;
> -       }
> +       if (ret)
> +               return dev_err_probe(dev, ret, "failed to deassert reset line\n");

You could also simplify this whole block with
devm_reset_control_get_exclusive_deasserted().

Either way,

Reviewed-by: Chen-Yu Tsai <wens@kernel.org>


>         init_completion(&p2wi->complete);
>         p2wi->adapter.dev.parent = dev;
> @@ -276,8 +262,7 @@ static int p2wi_probe(struct platform_device *pdev)
>
>         ret = devm_request_irq(dev, irq, p2wi_interrupt, 0, pdev->name, p2wi);
>         if (ret) {
> -               dev_err(dev, "can't register interrupt handler irq%d: %d\n",
> -                       irq, ret);
> +               dev_err_probe(dev, ret, "can't register interrupt handler irq%d\n", irq);
>                 goto err_reset_assert;
>         }
>
>
> --
> 2.43.0
>