[PATCH v5 13/14] PCI: rockchip-ep: Handle PERST# signal in endpoint mode

[Bjorn Helgaas]

On Thu, Oct 17, 2024 at 10:58:48AM +0900, Damien Le Moal wrote:
> Currently, the Rockchip PCIe endpoint controller driver does not handle
> the PERST# signal, which prevents detecting when link training should
> actually be started or if the host resets the device. This however can
> be supported using the controller reset_gpios property set as an input
> GPIO for endpoint mode.

> @@ -50,6 +51,9 @@ struct rockchip_pcie_ep {
>  	u64			irq_pci_addr;
>  	u8			irq_pci_fn;
>  	u8			irq_pending;
> +	int			perst_irq;
> +	bool			perst_asserted;
> +	bool			link_up;
>  	struct delayed_work	link_training;
>  };

I should have caught this last cycle, but just noticed this:

  $ make W=1 -k drivers/pci/ drivers/misc/pci_*
  ...
    CC      drivers/pci/controller/pcie-rockchip-ep.o
  drivers/pci/controller/pcie-rockchip-ep.c:59: warning: Function parameter or struct member 'perst_irq' not described in 'rockchip_pcie_ep'
  drivers/pci/controller/pcie-rockchip-ep.c:59: warning: Function parameter or struct member 'perst_asserted' not described in 'rockchip_pcie_ep'
  drivers/pci/controller/pcie-rockchip-ep.c:59: warning: Function parameter or struct member 'link_up' not described in 'rockchip_pcie_ep'
  drivers/pci/controller/pcie-rockchip-ep.c:59: warning: Function parameter or struct member 'link_training' not described in 'rockchip_pcie_ep'