linux-kernel - [PATCH v3 04/26] PCI: keystone: Perform host initialization in a single function

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Date:   Mon, 25 Mar 2019 15:09:25 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Murali Karicheri <m-karicheri2@...com>
CC:     Kishon Vijay Abraham I <kishon@...com>,
        Jingoo Han <jingoohan1@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-arm-kernel@...s.com>, Minghuan Lian <minghuan.Lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        Jesper Nilsson <jesper.nilsson@...s.com>
Subject: [PATCH v3 04/26] PCI: keystone: Perform host initialization in a single function

No functional change. Instead of having two functions
ks_pcie_add_pcie_port and ks_pcie_dw_host_init for initializing host,
have a single function to perform all the host initialization.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 63 +++++++++--------------
 1 file changed, 23 insertions(+), 40 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index e50f8773e768..566718ea7ebf 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -487,45 +487,6 @@ static int ks_pcie_start_link(struct dw_pcie *pci)
 	return 0;
 }
 
-/**
- * ks_pcie_dw_host_init() - initialize host for v3_65 dw hardware
- *
- * Ioremap the register resources, initialize legacy irq domain
- * and call dw_pcie_v3_65_host_init() API to initialize the Keystone
- * PCI host controller.
- */
-static int __init ks_pcie_dw_host_init(struct keystone_pcie *ks_pcie)
-{
-	struct dw_pcie *pci = ks_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = pci->dev;
-	struct platform_device *pdev = to_platform_device(dev);
-	struct resource *res;
-
-	/* Index 0 is the config reg. space address */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	pci->dbi_base = devm_pci_remap_cfg_resource(dev, res);
-	if (IS_ERR(pci->dbi_base))
-		return PTR_ERR(pci->dbi_base);
-
-	/*
-	 * We set these same and is used in pcie rd/wr_other_conf
-	 * functions
-	 */
-	pp->va_cfg0_base = pci->dbi_base + SPACE0_REMOTE_CFG_OFFSET;
-	pp->va_cfg1_base = pp->va_cfg0_base;
-
-	/* Index 1 is the application reg. space address */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	ks_pcie->va_app_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(ks_pcie->va_app_base))
-		return PTR_ERR(ks_pcie->va_app_base);
-
-	ks_pcie->app = *res;
-
-	return dw_pcie_host_init(pp);
-}
-
 static void ks_pcie_quirk(struct pci_dev *dev)
 {
 	struct pci_bus *bus = dev->bus;
@@ -843,10 +804,32 @@ static int __init ks_pcie_add_pcie_port(struct keystone_pcie *ks_pcie,
 	struct dw_pcie *pci = ks_pcie->pci;
 	struct pcie_port *pp = &pci->pp;
 	struct device *dev = &pdev->dev;
+	struct resource *res;
 	int ret;
 
+	/* Index 0 is the config reg. space address */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pci->dbi_base = devm_pci_remap_cfg_resource(dev, res);
+	if (IS_ERR(pci->dbi_base))
+		return PTR_ERR(pci->dbi_base);
+
+	/*
+	 * We set these same and is used in pcie rd/wr_other_conf
+	 * functions
+	 */
+	pp->va_cfg0_base = pci->dbi_base + SPACE0_REMOTE_CFG_OFFSET;
+	pp->va_cfg1_base = pp->va_cfg0_base;
+
+	/* Index 1 is the application reg. space address */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	ks_pcie->va_app_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ks_pcie->va_app_base))
+		return PTR_ERR(ks_pcie->va_app_base);
+
+	ks_pcie->app = *res;
+
 	pp->ops = &ks_pcie_host_ops;
-	ret = ks_pcie_dw_host_init(ks_pcie);
+	ret = dw_pcie_host_init(pp);
 	if (ret) {
 		dev_err(dev, "failed to initialize host\n");
 		return ret;
-- 
2.17.1