Add a legacy interrupt callback handler. Currently DesignWare IP don't
allow trigger legacy interrupts.
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
Acked-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
Change v1->v2:
- Nothing changed, just to follow the patch set version.
Change v2->v3:
- Nothing changed, just to follow the patch set version.
Change v3->v4:
- Rebased to Lorenzo's master branch v4.18-rc1.
Change v4->v5:
- Nothing changed, just to follow the patch set version.
drivers/pci/controller/dwc/pcie-designware-ep.c | 10 ++++++++++
drivers/pci/controller/dwc/pcie-designware-plat.c | 3 +--
drivers/pci/controller/dwc/pcie-designware.h | 6 ++++++
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 1f98db3..70d0688 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -370,6 +370,16 @@ static const struct pci_epc_ops epc_ops = {
.stop = dw_pcie_ep_stop,
};
+int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct device *dev = pci->dev;
+
+ dev_err(dev, "EP cannot trigger legacy IRQs\n");
+
+ return -EINVAL;
+}
+
int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num)
{
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index 654dcb5..90a8c95 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -84,8 +84,7 @@ static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
switch (type) {
case PCI_EPC_IRQ_LEGACY:
- dev_err(pci->dev, "EP cannot trigger legacy IRQs\n");
- return -EINVAL;
+ return dw_pcie_ep_raise_legacy_irq(ep, func_no);
case PCI_EPC_IRQ_MSI:
return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
case PCI_EPC_IRQ_MSIX:
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index a0ab12f..69e6e17 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -350,6 +350,7 @@ static inline int dw_pcie_allocate_domains(struct pcie_port *pp)
void dw_pcie_ep_linkup(struct dw_pcie_ep *ep);
int dw_pcie_ep_init(struct dw_pcie_ep *ep);
void dw_pcie_ep_exit(struct dw_pcie_ep *ep);
+int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no);
int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num);
int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
@@ -369,6 +370,11 @@ static inline void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
{
}
+static inline int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
+{
+ return 0;
+}
+
static inline int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
u8 interrupt_num)
{
--
2.7.4
