3 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie.txt b/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
index 92437a366e5f..7468d666763a 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
@@ -6,6 +6,7 @@ Required properties:
         "mediatek,mt2712-pcie"
         "mediatek,mt7622-pcie"
         "mediatek,mt7623-pcie"
+        "mediatek,mt7629-pcie"
 - device_type: Must be "pci"
 - reg: Base addresses and lengths of the PCIe subsys and root ports.
 - reg-names: Names of the above areas to use during resource lookup.
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 80601e1b939e..3eaa7081ab2a 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -73,6 +73,7 @@
 #define PCIE_MSI_VECTOR         0x0c0
 
 #define PCIE_CONF_VEND_ID       0x100
+#define PCIE_CONF_DEVICE_ID     0x102
 #define PCIE_CONF_CLASS_ID      0x106
 
 #define PCIE_INT_MASK           0x420
@@ -141,12 +142,16 @@ struct mtk_pcie_port;
 /**
  * struct mtk_pcie_soc - differentiate between host generations
  * @need_fix_class_id: whether this host's class ID needed to be fixed or not
+ * @need_fix_device_id: whether this host's device ID needed to be fixed or not
+ * @device_id: device ID which this host need to be fixed
  * @ops: pointer to configuration access functions
  * @startup: pointer to controller setting functions
  * @setup_irq: pointer to initialize IRQ functions
  */
 struct mtk_pcie_soc {
         bool need_fix_class_id;
+        bool need_fix_device_id;
+        unsigned int device_id;
         struct pci_ops *ops;
         int (*startup)(struct mtk_pcie_port *port);
         int (*setup_irq)(struct mtk_pcie_port *port, struct device_node *node);
@@ -696,6 +701,9 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
                 writew(val, port->base + PCIE_CONF_CLASS_ID);
         }
 
+        if (soc->need_fix_device_id)
+                writew(soc->device_id, port->base + PCIE_CONF_DEVICE_ID);
+
         /* 100ms timeout value should be enough for Gen1/2 training */
         err = readl_poll_timeout(port->base + PCIE_LINK_STATUS_V2, val,
                                  !!(val & PCIE_PORT_LINKUP_V2), 20,
@@ -1216,11 +1224,21 @@ static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = {
         .setup_irq = mtk_pcie_setup_irq,
 };
 
+static const struct mtk_pcie_soc mtk_pcie_soc_mt7629 = {
+        .need_fix_class_id = true,
+        .need_fix_device_id = true,
+        .device_id = PCI_DEVICE_ID_MEDIATEK_7629,
+        .ops = &mtk_pcie_ops_v2,
+        .startup = mtk_pcie_startup_port_v2,
+        .setup_irq = mtk_pcie_setup_irq,
+};
+
 static const struct of_device_id mtk_pcie_ids[] = {
         { .compatible = "mediatek,mt2701-pcie", .data = &mtk_pcie_soc_v1 },
         { .compatible = "mediatek,mt7623-pcie", .data = &mtk_pcie_soc_v1 },
         { .compatible = "mediatek,mt2712-pcie", .data = &mtk_pcie_soc_mt2712 },
         { .compatible = "mediatek,mt7622-pcie", .data = &mtk_pcie_soc_mt7622 },
+        { .compatible = "mediatek,mt7629-pcie", .data = &mtk_pcie_soc_mt7629 },
         {},
 };
 
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 5ce83544f38b..f3130542c752 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2132,6 +2132,7 @@
 #define PCI_VENDOR_ID_MYRICOM           0x14c1
 
 #define PCI_VENDOR_ID_MEDIATEK          0x14c3
+#define PCI_DEVICE_ID_MEDIATEK_7629     0x7629
 
 #define PCI_VENDOR_ID_TITAN             0x14D2
 #define PCI_DEVICE_ID_TITAN_010L        0x8001