PCI: mediatek: Convert bool to single quirks entry and bitmap

To clean Mediatek SoC PCIe struct, convert all the bool to a bitmap and
use a single quirks to reference all the values. This permits cleaner
addition of new quirk without having to define a new bool in the struct.

Signed-off-by: Christian Marangi <[e-mail]>
Signed-off-by: Manivannan Sadhasivam <[e-mail]>
Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/pci/controller/pcie-mediatek.c

···
 struct mtk_pcie_port;
 
 /**
+ * enum mtk_pcie_quirks - MTK PCIe quirks
+ * @MTK_PCIE_FIX_CLASS_ID: host's class ID needed to be fixed
+ * @MTK_PCIE_FIX_DEVICE_ID: host's device ID needed to be fixed
+ * @MTK_PCIE_NO_MSI: Bridge has no MSI support, and relies on an external block
+ */
+enum mtk_pcie_quirks {
+	MTK_PCIE_FIX_CLASS_ID = BIT(0),
+	MTK_PCIE_FIX_DEVICE_ID = BIT(1),
+	MTK_PCIE_NO_MSI = BIT(2),
+};
+
+/**
  * 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
- * @no_msi: Bridge has no MSI support, and relies on an external block
  * @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
+ * @quirks: PCIe device quirks.
  */
 struct mtk_pcie_soc {
-	bool need_fix_class_id;
-	bool need_fix_device_id;
-	bool no_msi;
 	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);
+	enum mtk_pcie_quirks quirks;
 };
 
 /**
···
 	writel(val, port->base + PCIE_RST_CTRL);
 
 	/* Set up vendor ID and class code */
-	if (soc->need_fix_class_id) {
+	if (soc->quirks & MTK_PCIE_FIX_CLASS_ID) {
 		val = PCI_VENDOR_ID_MEDIATEK;
 		writew(val, port->base + PCIE_CONF_VEND_ID);
 
···
 		writew(val, port->base + PCIE_CONF_CLASS_ID);
 	}
 
-	if (soc->need_fix_device_id)
+	if (soc->quirks & MTK_PCIE_FIX_DEVICE_ID)
 		writew(soc->device_id, port->base + PCIE_CONF_DEVICE_ID);
 
 	/* 100ms timeout value should be enough for Gen1/2 training */
···
 
 	host->ops = pcie->soc->ops;
 	host->sysdata = pcie;
-	host->msi_domain = pcie->soc->no_msi;
+	host->msi_domain = !!(pcie->soc->quirks & MTK_PCIE_NO_MSI);
 
 	err = pci_host_probe(host);
 	if (err)
···
 };
 
 static const struct mtk_pcie_soc mtk_pcie_soc_v1 = {
-	.no_msi = true,
 	.ops = &mtk_pcie_ops,
 	.startup = mtk_pcie_startup_port,
+	.quirks = MTK_PCIE_NO_MSI,
 };
 
 static const struct mtk_pcie_soc mtk_pcie_soc_mt2712 = {
···
 };
 
 static const struct mtk_pcie_soc mtk_pcie_soc_mt7622 = {
-	.need_fix_class_id = true,
 	.ops = &mtk_pcie_ops_v2,
 	.startup = mtk_pcie_startup_port_v2,
 	.setup_irq = mtk_pcie_setup_irq,
+	.quirks = MTK_PCIE_FIX_CLASS_ID,
 };
 
 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,
+	.quirks = MTK_PCIE_FIX_CLASS_ID | MTK_PCIE_FIX_DEVICE_ID,
 };
 
 static const struct of_device_id mtk_pcie_ids[] = {