[PATCH 02/15] PCI: dwc: Add ->get_features() callback function in dw_pcie_ep_ops

[Kishon Vijay Abraham I]

Each platform using Designware PCIe core can support different set of
endpoint features. Add a new callback function ->get_features() in
dw_pcie_ep_ops so that each platform using Designware PCIe core can
advertise its supported features to the endpoint function driver.

Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
 drivers/pci/controller/dwc/pcie-designware-ep.c | 12 ++++++++++++
 drivers/pci/controller/dwc/pcie-designware.h    |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c 
b/drivers/pci/controller/dwc/pcie-designware-ep.c
index a543c45c7224..7a2925a16ab8 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -355,6 +355,17 @@ static int dw_pcie_ep_start(struct pci_epc *epc)
        return pci->ops->start_link(pci);
 }
 
+static const struct pci_epc_features*
+dw_pcie_ep_get_features(struct pci_epc *epc, u8 func_no)
+{
+       struct dw_pcie_ep *ep = epc_get_drvdata(epc);
+
+       if (!ep->ops->get_features)
+               return NULL;
+
+       return ep->ops->get_features(ep);
+}
+
 static const struct pci_epc_ops epc_ops = {
        .write_header           = dw_pcie_ep_write_header,
        .set_bar                = dw_pcie_ep_set_bar,
@@ -368,6 +379,7 @@ static const struct pci_epc_ops epc_ops = {
        .raise_irq              = dw_pcie_ep_raise_irq,
        .start                  = dw_pcie_ep_start,
        .stop                   = dw_pcie_ep_stop,
+       .get_features           = dw_pcie_ep_get_features,
 };
 
 int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
diff --git a/drivers/pci/controller/dwc/pcie-designware.h 
b/drivers/pci/controller/dwc/pcie-designware.h
index 9943d8c68335..1f56e6ae34ff 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -192,6 +192,7 @@ struct dw_pcie_ep_ops {
        void    (*ep_init)(struct dw_pcie_ep *ep);
        int     (*raise_irq)(struct dw_pcie_ep *ep, u8 func_no,
                             enum pci_epc_irq_type type, u16 interrupt_num);
+       const struct pci_epc_features* (*get_features)(struct dw_pcie_ep *ep);
 };
 
 struct dw_pcie_ep {
-- 
2.17.1