PCI: fu740: Drop redundant '-gpios' from DT GPIO lookup

The calls to devm_gpiod_get_optional() have the -gpios at the end of the
name but the GPIO core code is already adding the suffix during the lookup.
This means the PCIe driver is not finding the necessary reset or power
lines to allow initialisation of the PCIe.

Drop the redundant '-gpios' when we look up GPIOs from the DT.

This bug has not been noticed because if U-Boot has setup the GPIO lines
for the hardware when it does the PCIe initialisation (either by booting
from PCIe or user command to access PCIe) then the PCIe will work in Linux.
The U-Boot as supplied by SiFive does not by default initialise any PCIe
component.

Link: https://lore.kernel.org/r/20220221210347.1335004-1-ben.dooks@codethink.co.uk
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/controller/dwc/pcie-fu740.c b/drivers/pci/controller/dwc/pcie-fu740.c
index 00cde9a248b5a4dfedc75bc18b96a07df192bdfb..842b7202b96e6f26fbdab706b0ce5faee865c453 100644 (file)
--- a/drivers/pci/controller/dwc/pcie-fu740.c
+++ b/drivers/pci/controller/dwc/pcie-fu740.c
@@ -259,11 +259,11 @@ static int fu740_pcie_probe(struct platform_device *pdev)
                return PTR_ERR(afp->mgmt_base);
 
        /* Fetch GPIOs */
-       afp->reset = devm_gpiod_get_optional(dev, "reset-gpios", GPIOD_OUT_LOW);
+       afp->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
        if (IS_ERR(afp->reset))
                return dev_err_probe(dev, PTR_ERR(afp->reset), "unable to get reset-gpios\n");
 
-       afp->pwren = devm_gpiod_get_optional(dev, "pwren-gpios", GPIOD_OUT_LOW);
+       afp->pwren = devm_gpiod_get_optional(dev, "pwren", GPIOD_OUT_LOW);
        if (IS_ERR(afp->pwren))
                return dev_err_probe(dev, PTR_ERR(afp->pwren), "unable to get pwren-gpios\n");