[PATCH v2 1/2] PCI: tegra194: Use dev_err_probe() for PERST# GPIO

[PATCH v2 1/2] PCI: tegra194: Use dev_err_probe() for PERST# GPIO

[phucduc.bui]

From: bui duc phuc <phucduc.bui@gmail.com>

Use dev_err_probe() when getting the PERST# GPIO to simplify error
handling and properly handle -EPROBE_DEFER.

Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---

Changes in v2:
 - Follow the subject line capitalization style.
 - Use "PERST#" in the subject, commit log, and dmesg text to match
   spec usage.

 drivers/pci/controller/dwc/pcie-tegra194.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 63a0f56cad8e..2f8e828c4d9a 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1200,18 +1200,9 @@ static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie)
 
 	/* Endpoint mode specific DT entries */
 	pcie->pex_rst_gpiod = devm_gpiod_get(pcie->dev, "reset", GPIOD_IN);
-	if (IS_ERR(pcie->pex_rst_gpiod)) {
-		int err = PTR_ERR(pcie->pex_rst_gpiod);
-		const char *level = KERN_ERR;
-
-		if (err == -EPROBE_DEFER)
-			level = KERN_DEBUG;
-
-		dev_printk(level, pcie->dev,
-			   dev_fmt("Failed to get PERST GPIO: %d\n"),
-			   err);
-		return err;
-	}
+	if (IS_ERR(pcie->pex_rst_gpiod))
+		return dev_err_probe(pcie->dev, PTR_ERR(pcie->pex_rst_gpiod),
+				     "Failed to get PERST# GPIO\n");
 
 	pcie->pex_refclk_sel_gpiod = devm_gpiod_get_optional(pcie->dev,
 							     "nvidia,refclk-select",
-- 
2.43.0

[PATCH v2 2/2] PCI: tegra194: Propagate REFCLK select GPIO errors

[phucduc.bui]

From: bui duc phuc <phucduc.bui@gmail.com>

devm_gpiod_get_optional() returns NULL when the optional GPIO is not
present, but may return -EPROBE_DEFER or other errors.

The current code treats GPIO lookup errors as if the GPIO were not
present.

Check the return value and propagate errors from the REFCLK select GPIO
lookup.

Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---

Changes in v2:
 - Follow the subject line capitalization style.

 drivers/pci/controller/dwc/pcie-tegra194.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 2f8e828c4d9a..4c1f22b88288 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1207,18 +1207,9 @@ static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie)
 	pcie->pex_refclk_sel_gpiod = devm_gpiod_get_optional(pcie->dev,
 							     "nvidia,refclk-select",
 							     GPIOD_OUT_HIGH);
-	if (IS_ERR(pcie->pex_refclk_sel_gpiod)) {
-		int err = PTR_ERR(pcie->pex_refclk_sel_gpiod);
-		const char *level = KERN_ERR;
-
-		if (err == -EPROBE_DEFER)
-			level = KERN_DEBUG;
-
-		dev_printk(level, pcie->dev,
-			   dev_fmt("Failed to get REFCLK select GPIOs: %d\n"),
-			   err);
-		pcie->pex_refclk_sel_gpiod = NULL;
-	}
+	if (IS_ERR(pcie->pex_refclk_sel_gpiod))
+		return dev_err_probe(pcie->dev, PTR_ERR(pcie->pex_refclk_sel_gpiod),
+				     "Failed to get REFCLK select GPIO\n");
 
 	return 0;
 }
-- 
2.43.0

Re: [PATCH v2 1/2] PCI: tegra194: Use dev_err_probe() for PERST# GPIO

[Thierry Reding]

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On Mon, Oct 12, 2026 at 04:48:14PM +0700, phucduc.bui@gmail.com wrote:
> From: bui duc phuc <phucduc.bui@gmail.com>
> 
> Use dev_err_probe() when getting the PERST# GPIO to simplify error
> handling and properly handle -EPROBE_DEFER.
> 
> Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
> Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
> ---
> 
> Changes in v2:
>  - Follow the subject line capitalization style.
>  - Use "PERST#" in the subject, commit log, and dmesg text to match
>    spec usage.
> 
>  drivers/pci/controller/dwc/pcie-tegra194.c | 15 +++------------
>  1 file changed, 3 insertions(+), 12 deletions(-)

Reviewed-by: Thierry Reding <treding@nvidia.com>

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Re: [PATCH v2 2/2] PCI: tegra194: Propagate REFCLK select GPIO errors

[Thierry Reding]

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On Mon, Oct 12, 2026 at 04:48:15PM +0700, phucduc.bui@gmail.com wrote:
> From: bui duc phuc <phucduc.bui@gmail.com>
> 
> devm_gpiod_get_optional() returns NULL when the optional GPIO is not
> present, but may return -EPROBE_DEFER or other errors.
> 
> The current code treats GPIO lookup errors as if the GPIO were not
> present.
> 
> Check the return value and propagate errors from the REFCLK select GPIO
> lookup.
> 
> Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
> Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
> ---
> 
> Changes in v2:
>  - Follow the subject line capitalization style.
> 
>  drivers/pci/controller/dwc/pcie-tegra194.c | 15 +++------------

Reviewed-by: Thierry Reding <treding@nvidia.com>

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