linux-kernel - [PATCH] PCI: dwc: Add map irq callback

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Date:   Wed, 14 Aug 2019 14:56:49 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        linux-pci@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, andriy.shevchenko@...el.com,
        Dilip Kota <eswara.kota@...ux.intel.com>
Subject: [PATCH] PCI: dwc: Add map irq callback

Certain platforms like Intel need to configure
registers to enable the interrupts.
Map Irq callback helps to perform platform specific
configurations while assigning or enabling the interrupts.

Signed-off-by: Dilip Kota <eswara.kota@...ux.intel.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index f93252d0da5b..5880d2b72ef8 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -470,7 +470,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
 	bridge->sysdata = pp;
 	bridge->busnr = pp->root_bus_nr;
 	bridge->ops = &dw_pcie_ops;
-	bridge->map_irq = of_irq_parse_and_map_pci;
+	bridge->map_irq = pp->map_irq ? pp->map_irq : of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
 	ret = pci_scan_root_bus_bridge(bridge);
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index ffed084a0b4f..604abc4fa89b 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -173,6 +173,7 @@ struct pcie_port {
 	struct resource		*busn;
 	int			irq;
 	const struct dw_pcie_host_ops *ops;
+	int (*map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
 	int			msi_irq;
 	struct irq_domain	*irq_domain;
 	struct irq_domain	*msi_domain;
-- 
2.11.0