PCI: controller: Use dev_fwnode() instead of of_fwnode_handle()

All irq_domain functions now accept fwnode instead of of_node. But many
PCI controllers still extract dev to of_node and then of_node to fwnode.

Instead, clean this up and simply use the dev_fwnode() helper to extract
fwnode directly from dev. Internally, it still does dev => of_node =>
fwnode steps, but it's now hidden from the users.

In the case of altera, this also removes an unused 'node' variable that is
only used when CONFIG_OF is enabled:

  drivers/pci/controller/pcie-altera.c: In function 'altera_pcie_init_irq_domain':
  drivers/pci/controller/pcie-altera.c:855:29: error: unused variable 'node' [-Werror=unused-variable]
    855 |         struct device_node *node = dev->of_node;

Signed-off-by: Jiri Slaby (SUSE) <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>	# altera
[bhelgaas: squash together, rebase to precede msi-parent]
Signed-off-by: Bjorn Helgaas <[email protected]>
Link: https://patch.msgid.link/[email protected]
Link: https://patch.msgid.link/[email protected]
Link: https://patch.msgid.link/[email protected]

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 906277f9ffaf..1e1291f2e2af 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -227,7 +227,7 @@ static const struct irq_domain_ops dw_pcie_msi_domain_ops = {
 int dw_pcie_allocate_domains(struct dw_pcie_rp *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-	struct fwnode_handle *fwnode = of_fwnode_handle(pci->dev->of_node);
+	struct fwnode_handle *fwnode = dev_fwnode(pci->dev);
 
 	pp->irq_domain = irq_domain_create_linear(fwnode, pp->num_vectors,
 					       &dw_pcie_msi_domain_ops, pp);