linux-kernel - [PATCH v6 3/5] PCI: mediatek: Convert bool to single quirks entry and bitmap

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Message-ID: <20251020111121.31779-4-ansuelsmth@gmail.com>
Date: Mon, 20 Oct 2025 13:11:07 +0200
From: Christian Marangi <ansuelsmth@...il.com>
To: Ryder Lee <ryder.lee@...iatek.com>,
	Jianjun Wang <jianjun.wang@...iatek.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Manivannan Sadhasivam <mani@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Russell King <linux@...linux.org.uk>,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Christian Marangi <ansuelsmth@...il.com>,
	linux-pci@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	netdev@...r.kernel.org,
	upstream@...oha.com
Subject: [PATCH v6 3/5] 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 <ansuelsmth@...il.com>
---
 drivers/pci/controller/pcie-mediatek.c | 33 ++++++++++++++++----------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 24cc30a2ab6c..cbffa3156da1 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -142,24 +142,32 @@
 
 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;
 };
 
 /**
@@ -703,7 +711,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
 	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);
 
@@ -711,7 +719,7 @@ 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)
+	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 */
@@ -1099,7 +1107,7 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 
 	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)
@@ -1187,9 +1195,9 @@ static const struct dev_pm_ops mtk_pcie_pm_ops = {
 };
 
 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 = {
@@ -1199,19 +1207,18 @@ 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[] = {
-- 
2.51.0