Re: [PATCH 3/3] PCI: qcom: Treat PHY and PERST# as optional for the new binding

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 10/10/25 8:25 PM, Manivannan Sadhasivam wrote:
> Even for the new DT binding where the PHY and PERST# properties are
> specified in the Root Port, both are optional. Hence, treat them as
> optional in the driver too.

I suppose this makes sense if the PHY is transparent to the OS
or otherwise pre-programmed and PERST# is hardwired or otherwise
unnecessary.. both of which I suppose aren't totally impossible..

> 
> If both properties are not specified, then fall back to parsing the legacy
> binding for backwards compatibility.
> 
> Fixes: a2fbecdbbb9d ("PCI: qcom: Add support for parsing the new Root Port binding")
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 805edbbfe7eba496bc99ca82051dee43d240f359..d380981cf3ad78f549de3dc06bd2f626f8f53920 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -1720,13 +1720,20 @@ static int qcom_pcie_parse_port(struct qcom_pcie *pcie, struct device_node *node
>  
>  	reset = devm_fwnode_gpiod_get(dev, of_fwnode_handle(node),
>  				      "reset", GPIOD_OUT_HIGH, "PERST#");
> -	if (IS_ERR(reset))
> +	if (IS_ERR(reset) && PTR_ERR(reset) != -ENOENT)
>  		return PTR_ERR(reset);

Please introduce an _optional variant instead

Konrad