6.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ioana Ciornei ioana.ciornei@nxp.com
commit 4c8c0ffd41d16cf08ccb0d3626beb54adfe5450a upstream.
The arg_count parameter to syscon_regmap_lookup_by_phandle_args() represents the number of argument cells following the phandle. In this case, the number of arguments should be 1 instead of 2 since the dt property looks like this:
fsl,pcie-scfg = <&scfg 0>;
Without this fix, layerscape-pcie fails with the following message on LS1043A:
OF: /soc/pcie@3500000: phandle scfg@1570000 needs 2, found 1 layerscape-pcie 3500000.pcie: No syscfg phandle specified layerscape-pcie 3500000.pcie: probe with driver layerscape-pcie failed with error -22
Link: https://lore.kernel.org/r/20250327151949.2765193-1-ioana.ciornei@nxp.com Fixes: 149fc35734e5 ("PCI: layerscape: Use syscon_regmap_lookup_by_phandle_args") Signed-off-by: Ioana Ciornei ioana.ciornei@nxp.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Frank Li Frank.Li@nxp.com Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Acked-by: Roy Zang Roy.Zang@nxp.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/controller/dwc/pci-layerscape.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c index 239a05b36e8e..a44b5c256d6e 100644 --- a/drivers/pci/controller/dwc/pci-layerscape.c +++ b/drivers/pci/controller/dwc/pci-layerscape.c @@ -356,7 +356,7 @@ static int ls_pcie_probe(struct platform_device *pdev) if (pcie->drvdata->scfg_support) { pcie->scfg = syscon_regmap_lookup_by_phandle_args(dev->of_node, - "fsl,pcie-scfg", 2, + "fsl,pcie-scfg", 1, index); if (IS_ERR(pcie->scfg)) { dev_err(dev, "No syscfg phandle specified\n");