From: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
In LS7A, multifunction device use same PCI PIN (because the PIN register
report the same INTx value to each function) but we need different IRQ
for different functions, so add a quirk to fix it for standard PCI PIN
usage.
Signed-off-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
drivers/pci/quirks.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 10b3b2057940..6ab4b3bba36b 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -242,6 +242,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
DEV_LS7A_LPC, loongson_system_bus_quirk);
+static void loongson_pci_pin_quirk(struct pci_dev *dev)
+{
+ dev->pin = 1 + (PCI_FUNC(dev->devfn) & 3);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, DEV_PCIE_PORT_0, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, DEV_PCIE_PORT_1, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, DEV_PCIE_PORT_2, loongson_pci_pin_quirk);
+
static void loongson_mrrs_quirk(struct pci_dev *dev)
{
struct pci_bus *bus = dev->bus;
--
2.27.0
