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Message-Id: <20250315201548.858189-10-helgaas@kernel.org>
Date: Sat, 15 Mar 2025 15:15:44 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Rob Herring <robh@...nel.org>,
Saravana Kannan <saravanak@...gle.com>,
Jingoo Han <jingoohan1@...il.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Krzysztof WilczyĆski <kw@...ux.com>,
Richard Zhu <hongxing.zhu@....com>,
Lucas Stach <l.stach@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
Niklas Cassel <cassel@...nel.org>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
imx@...ts.linux.dev,
Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v12 09/13] PCI: dwc: ep: Consolidate devicetree handling in dw_pcie_ep_get_resources()
From: Bjorn Helgaas <bhelgaas@...gle.com>
Consolidate devicetree resource handling in dw_pcie_ep_get_resources().
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
.../pci/controller/dwc/pcie-designware-ep.c | 68 +++++++++++--------
1 file changed, 41 insertions(+), 27 deletions(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index 100d26466f05..2db834345ec2 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -883,35 +883,15 @@ void dw_pcie_ep_linkdown(struct dw_pcie_ep *ep)
}
EXPORT_SYMBOL_GPL(dw_pcie_ep_linkdown);
-/**
- * dw_pcie_ep_init - Initialize the endpoint device
- * @ep: DWC EP device
- *
- * Initialize the endpoint device. Allocate resources and create the EPC
- * device with the endpoint framework.
- *
- * Return: 0 if success, errno otherwise.
- */
-int dw_pcie_ep_init(struct dw_pcie_ep *ep)
+static int dw_pcie_ep_get_resources(struct dw_pcie_ep *ep)
{
- int ret;
- struct resource *res;
- struct pci_epc *epc;
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct device *dev = pci->dev;
struct platform_device *pdev = to_platform_device(dev);
struct device_node *np = dev->of_node;
-
- INIT_LIST_HEAD(&ep->func_list);
-
- epc = devm_pci_epc_create(dev, &epc_ops);
- if (IS_ERR(epc)) {
- dev_err(dev, "Failed to create epc device\n");
- return PTR_ERR(epc);
- }
-
- ep->epc = epc;
- epc_set_drvdata(epc, ep);
+ struct pci_epc *epc = ep->epc;
+ struct resource *res;
+ int ret;
ret = dw_pcie_get_resources(pci);
if (ret)
@@ -924,13 +904,47 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
ep->phys_base = res->start;
ep->addr_size = resource_size(res);
- if (ep->ops->pre_init)
- ep->ops->pre_init(ep);
-
ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
if (ret < 0)
epc->max_functions = 1;
+ return 0;
+}
+
+/**
+ * dw_pcie_ep_init - Initialize the endpoint device
+ * @ep: DWC EP device
+ *
+ * Initialize the endpoint device. Allocate resources and create the EPC
+ * device with the endpoint framework.
+ *
+ * Return: 0 if success, errno otherwise.
+ */
+int dw_pcie_ep_init(struct dw_pcie_ep *ep)
+{
+ int ret;
+ struct pci_epc *epc;
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ struct device *dev = pci->dev;
+
+ INIT_LIST_HEAD(&ep->func_list);
+
+ epc = devm_pci_epc_create(dev, &epc_ops);
+ if (IS_ERR(epc)) {
+ dev_err(dev, "Failed to create epc device\n");
+ return PTR_ERR(epc);
+ }
+
+ ep->epc = epc;
+ epc_set_drvdata(epc, ep);
+
+ ret = dw_pcie_ep_get_resources(ep);
+ if (ret)
+ return ret;
+
+ if (ep->ops->pre_init)
+ ep->ops->pre_init(ep);
+
ret = pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
ep->page_size);
if (ret < 0) {
--
2.34.1
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