linux-kernel - [PATCH v2 1/3] PCI: dwc: Add map irq callback

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Date:   Tue, 20 Aug 2019 17:39:35 +0800
From:   Dilip Kota <eswara.kota@...ux.intel.com>
To:     jingoohan1@...il.com, gustavo.pimentel@...opsys.com,
        linux-pci@...r.kernel.org, hch@...radead.org,
        devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, andriy.shevchenko@...el.com,
        cheol.yong.kim@...el.com, chuanhua.lei@...ux.intel.com,
        qi-ming.wu@...el.com, Dilip Kota <eswara.kota@...ux.intel.com>
Subject: [PATCH v2 1/3] 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>
---
changes on v2:
	Addressing review comments to use if else {} instead of ternary operator
	to improver code readability.

 drivers/pci/controller/dwc/pcie-designware-host.c | 6 +++++-
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 6 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..ca7b40ff5c94 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -470,9 +470,13 @@ 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->swizzle_irq = pci_common_swizzle;
 
+	if (pp->map_irq)
+		bridge->map_irq = pp->map_irq;
+	else
+		bridge->map_irq = of_irq_parse_and_map_pci;
+
 	ret = pci_scan_root_bus_bridge(bridge);
 	if (ret)
 		goto err_free_msi;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index ffed084a0b4f..bc3657800dfa 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