diff mbox series

[v12,09/13] PCI: dwc: ep: Consolidate devicetree handling in dw_pcie_ep_get_resources()

Message ID 20250315201548.858189-10-helgaas@kernel.org (mailing list archive)
State New
Headers show
Series PCI: Use device bus range info to cleanup RC Host/EP pci_fixup_addr() | expand

Commit Message

Bjorn Helgaas March 15, 2025, 8:15 p.m. UTC 
From: Bjorn Helgaas <bhelgaas@google.com>

Consolidate devicetree resource handling in dw_pcie_ep_get_resources().
No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 .../pci/controller/dwc/pcie-designware-ep.c   | 68 +++++++++++--------
 1 file changed, 41 insertions(+), 27 deletions(-)

Comments

Frank Li March 16, 2025, 1:26 a.m. UTC | #1 
On Sat, Mar 15, 2025 at 03:15:44PM -0500, Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> Consolidate devicetree resource handling in dw_pcie_ep_get_resources().
> No functional change intended.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.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
>
diff mbox series

Patch

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) {