linux-kernel - [PATCHv9 02/12] PCI: mobiveil: Move the host initialization into a routine

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Date:   Wed, 20 Nov 2019 03:45:30 +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 02/12] PCI: mobiveil: Move the host initialization into a
 routine

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

Move the host initialization related operations into a new
routine to make it can be reused by other incoming platform's
PCIe host driver, in which the Mobiveil GPEX is integrated.

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/pcie-mobiveil.c | 38 +++++++++++++++-----------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
index 5fd26e376af2..97f682ca7c7a 100644
--- a/drivers/pci/controller/pcie-mobiveil.c
+++ b/drivers/pci/controller/pcie-mobiveil.c
@@ -873,27 +873,15 @@ static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
 	return 0;
 }
 
-static int mobiveil_pcie_probe(struct platform_device *pdev)
+int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
 {
-	struct mobiveil_pcie *pcie;
+	struct root_port *rp = &pcie->rp;
+	struct pci_host_bridge *bridge = rp->bridge;
+	struct device *dev = &pcie->pdev->dev;
 	struct pci_bus *bus;
 	struct pci_bus *child;
-	struct pci_host_bridge *bridge;
-	struct device *dev = &pdev->dev;
-	struct root_port *rp;
 	int ret;
 
-	/* allocate the PCIe port */
-	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
-	if (!bridge)
-		return -ENOMEM;
-
-	pcie = pci_host_bridge_priv(bridge);
-	rp = &pcie->rp;
-	rp->bridge = bridge;
-
-	pcie->pdev = pdev;
-
 	ret = mobiveil_pcie_parse_dt(pcie);
 	if (ret) {
 		dev_err(dev, "Parsing DT failed, ret: %x\n", ret);
@@ -956,6 +944,24 @@ static int mobiveil_pcie_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static int mobiveil_pcie_probe(struct platform_device *pdev)
+{
+	struct mobiveil_pcie *pcie;
+	struct pci_host_bridge *bridge;
+	struct device *dev = &pdev->dev;
+
+	bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
+	if (!bridge)
+		return -ENOMEM;
+
+	pcie = pci_host_bridge_priv(bridge);
+	pcie->rp.bridge = bridge;
+
+	pcie->pdev = pdev;
+
+	return mobiveil_pcie_host_probe(pcie);
+}
+
 static const struct of_device_id mobiveil_pcie_of_match[] = {
 	{.compatible = "mbvl,gpex40-pcie",},
 	{},
-- 
2.17.1