PCI: dwc: meson: Use pci_ops for root config space accessors

Now that DWC drivers can setup their own pci_ops for the root and child
buses, convert the Amlogic meson driver to use the standard pci_ops for
root bus config accesses.

Link: https://lore.kernel.org/r/20200821035420.380495-9-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Yue Wang <yue.wang@Amlogic.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: linux-amlogic@lists.infradead.org

drivers/pci/controller/dwc/pci-meson.c

@@ -383,13 +383,12 @@ static void meson_pcie_enable_interrupts(struct meson_pcie *mp)
 		dw_pcie_msi_init(&mp->pci.pp);
 }
 
-static int meson_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
-				  u32 *val)
+static int meson_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn,
+				  int where, int size, u32 *val)
 {
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	int ret;
 
-	ret = dw_pcie_read(pci->dbi_base + where, size, val);
+	ret = pci_generic_config_read(bus, devfn, where, size, val);
 	if (ret != PCIBIOS_SUCCESSFUL)
 		return ret;
 
@@ -410,13 +409,11 @@ static int meson_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
 	return PCIBIOS_SUCCESSFUL;
 }
 
-static int meson_pcie_wr_own_conf(struct pcie_port *pp, int where,
-				  int size, u32 val)
-{
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
-	return dw_pcie_write(pci->dbi_base + where, size, val);
-}
+static struct pci_ops meson_pci_ops = {
+	.map_bus = dw_pcie_own_conf_map_bus,
+	.read = meson_pcie_rd_own_conf,
+	.write = pci_generic_config_write,
+};
 
 static int meson_pcie_link_up(struct dw_pcie *pci)
 {
@@ -463,6 +460,8 @@ static int meson_pcie_host_init(struct pcie_port *pp)
 	struct meson_pcie *mp = to_meson_pcie(pci);
 	int ret;
 
+	pp->bridge->ops = &meson_pci_ops;
+
 	ret = meson_pcie_establish_link(mp);
 	if (ret)
 		return ret;
@@ -473,8 +472,6 @@ static int meson_pcie_host_init(struct pcie_port *pp)
 }
 
 static const struct dw_pcie_host_ops meson_pcie_host_ops = {
-	.rd_own_conf = meson_pcie_rd_own_conf,
-	.wr_own_conf = meson_pcie_wr_own_conf,
 	.host_init = meson_pcie_host_init,
 };