linux-kernel - [PATCH v6 11/19] PCI: microchip: Add request_event

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Message-ID: <20230915102243.59775-12-minda.chen@starfivetech.com>
Date:   Fri, 15 Sep 2023 18:22:35 +0800
From:   Minda Chen <minda.chen@...rfivetech.com>
To:     Daire McNamara <daire.mcnamara@...rochip.com>,
        Conor Dooley <conor@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-pci@...r.kernel.org>,
        Pali Rohár <pali@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mason Huo <mason.huo@...rfivetech.com>,
        Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
        Kevin Xie <kevin.xie@...rfivetech.com>,
        Minda Chen <minda.chen@...rfivetech.com>
Subject: [PATCH v6 11/19] PCI: microchip: Add request_event_irq() callback function

PolarFire register 28 interrupts symbols name.
PLDA just reguster 13 interrupts, it is not require to
register symbol name. So add a callback functions
to support StarFive and Microchip platforms.

Signed-off-by: Minda Chen <minda.chen@...rfivetech.com>
---
 .../pci/controller/plda/pcie-microchip-host.c | 25 ++++++++++++++++---
 drivers/pci/controller/plda/pcie-plda.h       |  5 ++++
 2 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/plda/pcie-microchip-host.c b/drivers/pci/controller/plda/pcie-microchip-host.c
index d9dd63084e2b..e3c7d5e66150 100644
--- a/drivers/pci/controller/plda/pcie-microchip-host.c
+++ b/drivers/pci/controller/plda/pcie-microchip-host.c
@@ -798,6 +798,17 @@ static int mc_pcie_init_clks(struct device *dev)
 	return 0;
 }
 
+static int mc_request_event_irq(struct plda_pcie_rp *plda, int event_irq,
+				int event)
+{
+	return devm_request_irq(plda->dev, event_irq, mc_event_handler,
+				0, event_cause[event].sym, plda);
+}
+
+static const struct plda_event mc_event = {
+	.request_event_irq      = mc_request_event_irq,
+};
+
 static int plda_pcie_init_irq_domains(struct plda_pcie_rp *port)
 {
 	struct device *dev = port->dev;
@@ -897,7 +908,9 @@ static void mc_disable_interrupts(struct mc_pcie *port)
 	writel_relaxed(GENMASK(31, 0), bridge_base_addr + ISTATUS_HOST);
 }
 
-static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_rp *port)
+static int plda_init_interrupts(struct platform_device *pdev,
+				struct plda_pcie_rp *port,
+				const struct plda_event *event)
 {
 	struct device *dev = &pdev->dev;
 	int irq;
@@ -921,8 +934,12 @@ static int plda_init_interrupts(struct platform_device *pdev, struct plda_pcie_r
 			return -ENXIO;
 		}
 
-		ret = devm_request_irq(dev, event_irq, mc_event_handler,
-				       0, event_cause[i].sym, port);
+		if (event->request_event_irq)
+			ret = event->request_event_irq(port, event_irq, i);
+		else
+			ret = devm_request_irq(dev, event_irq, plda_event_handler,
+					       0, NULL, port);
+
 		if (ret) {
 			dev_err(dev, "failed to request IRQ %d\n", event_irq);
 			return ret;
@@ -976,7 +993,7 @@ static int mc_platform_init(struct pci_config_window *cfg)
 		return ret;
 
 	/* Address translation is up; safe to enable interrupts */
-	ret = plda_init_interrupts(pdev, &port->plda);
+	ret = plda_init_interrupts(pdev, &port->plda, &mc_event);
 	if (ret)
 		return ret;
 
diff --git a/drivers/pci/controller/plda/pcie-plda.h b/drivers/pci/controller/plda/pcie-plda.h
index 5b09ffed623c..4e0712c9365e 100644
--- a/drivers/pci/controller/plda/pcie-plda.h
+++ b/drivers/pci/controller/plda/pcie-plda.h
@@ -153,6 +153,11 @@ struct plda_pcie_rp {
 	int num_events;
 };
 
+struct plda_event {
+	int (*request_event_irq)(struct plda_pcie_rp *pcie,
+				 int event_irq, int event);
+};
+
 irqreturn_t plda_event_handler(int irq, void *dev_id);
 void plda_pcie_setup_window(void __iomem *bridge_base_addr, u32 index,
 			    phys_addr_t axi_addr, phys_addr_t pci_addr,
-- 
2.17.1