linux-kernel - [PATCHv9 05/12] PCI: mobiveil: Add callback function for interrupt initialization

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Message-ID: <20191120034451.30102-6-Zhiqiang.Hou@nxp.com>
Date:   Wed, 20 Nov 2019 03:45:50 +0000
From:   "Z.q. Hou" <zhiqiang.hou@....com>
To:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "l.subrahmanya@...iveil.co.in" <l.subrahmanya@...iveil.co.in>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "m.karthikeyan@...iveil.co.in" <m.karthikeyan@...iveil.co.in>,
        Leo Li <leoyang.li@....com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        "andrew.murray@....com" <andrew.murray@....com>
CC:     Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>,
        "Z.q. Hou" <zhiqiang.hou@....com>
Subject: [PATCHv9 05/12] PCI: mobiveil: Add callback function for interrupt
 initialization

From: Hou Zhiqiang <Zhiqiang.Hou@....com>

The Mobiveil GPEX internal MSI/INTx controller may not be used
by other platforms in which the Mobiveil GPEX is integrated.
This patch is to allow these platforms to implement their
specific interrupt initialization.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
---
V9:
 - New patch splited from the #1 of V8 patches to make it easy to review.

 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 3 +++
 drivers/pci/controller/mobiveil/pcie-mobiveil.h      | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index 2cc424e78d33..3cd93df6fe6e 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -507,6 +507,9 @@ static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
 	struct resource *res;
 	int ret;
 
+	if (rp->ops->interrupt_init)
+		return rp->ops->interrupt_init(pcie);
+
 	/* map MSI config resource */
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "apb_csr");
 	pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil.h b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
index e3148078e9dd..18d85806a7fc 100644
--- a/drivers/pci/controller/mobiveil/pcie-mobiveil.h
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.h
@@ -130,10 +130,17 @@ struct mobiveil_msi {			/* MSI information */
 	DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
 };
 
+struct mobiveil_pcie;
+
+struct mobiveil_rp_ops {
+	int (*interrupt_init)(struct mobiveil_pcie *pcie);
+};
+
 struct root_port {
 	char root_bus_nr;
 	void __iomem *config_axi_slave_base;	/* endpoint config base */
 	struct resource *ob_io_res;
+	struct mobiveil_rp_ops *ops;
 	int irq;
 	raw_spinlock_t intx_mask_lock;
 	struct irq_domain *intx_domain;
-- 
2.17.1