PCI: plda: Pass pci_host_bridge to plda_pcie_setup_iomems()

plda_pcie_setup_iomems() needs the bridge->windows list from struct
pci_host_bridge and is currently used only by pcie-microchip-host.c.  This
driver uses pci_host_common_probe(), which sets a pci_host_bridge as the
drvdata, so plda_pcie_setup_iomems() used platform_get_drvdata() to find
the pci_host_bridge.

But we also want to use plda_pcie_setup_iomems() in the new pcie-starfive.c
driver, which does not use pci_host_common_probe() and will have struct
starfive_jh7110_pcie as its drvdata, so pass the pci_host_bridge directly
to plda_pcie_setup_iomems() so it doesn't need platform_get_drvdata() to
find it.

Link: https://lore.kernel.org/linux-pci/20240328091835.14797-9-minda.chen@starfivetech.comSigned-off-by: Minda Chen <minda.chen@starfivetech.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
[bhelgaas: commit log, reorder to where this is needed]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

drivers/pci/controller/plda/pcie-microchip-host.c

@@ -616,6 +616,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
 {
 	struct device *dev = cfg->parent;
 	struct platform_device *pdev = to_platform_device(dev);
+	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
 	void __iomem *bridge_base_addr =
 		port->axi_base_addr + MC_PCIE_BRIDGE_ADDR;
 	int ret;
@@ -629,7 +630,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
 	mc_pcie_enable_msi(port, cfg->win);
 
 	/* Configure non-config space outbound ranges */
-	ret = plda_pcie_setup_iomems(pdev, &port->plda);
+	ret = plda_pcie_setup_iomems(bridge, &port->plda);
 	if (ret)
 		return ret;
 

drivers/pci/controller/plda/pcie-plda-host.c

@@ -533,11 +533,10 @@ void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
 }
 EXPORT_SYMBOL_GPL(plda_pcie_setup_window);
 
-int plda_pcie_setup_iomems(struct platform_device *pdev,
+int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
 			   struct plda_pcie_rp *port)
 {
 	void __iomem *bridge_base_addr = port->bridge_addr;
-	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
 	struct resource_entry *entry;
 	u64 pci_addr;
 	u32 index = 1;

drivers/pci/controller/plda/pcie-plda.h

@@ -190,7 +190,7 @@ int plda_init_interrupts(struct platform_device *pdev,
 void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
 			    phys_addr_t axi_addr, phys_addr_t pci_addr,
 			    size_t size);
-int plda_pcie_setup_iomems(struct platform_device *pdev,
+int plda_pcie_setup_iomems(struct pci_host_bridge *bridge,
 			   struct plda_pcie_rp *port);
 int plda_pcie_host_init(struct plda_pcie_rp *port, struct pci_ops *ops,
 			const struct plda_event *plda_event);