Commit ec15c4d0 authored by Ley Foon Tan's avatar Ley Foon Tan Committed by Lorenzo Pieralisi
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PCI: altera: Allow building as module 



Altera PCIe Rootport IP is a soft IP and is only available after
an FPGA image (whose design contains it) is programmed.

Make driver modulable to support use cases when FPGA image is
programmed after the kernel has booted, so that the driver
can be loaded upon request.

Signed-off-by: default avatarLey Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent a188339c

drivers/pci/controller/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -174,7 +174,7 @@ config PCIE_IPROC_MSI 
	  PCIe controller



config PCIE_ALTERA

	bool "Altera PCIe controller"

	tristate "Altera PCIe controller"

	depends on ARM || NIOS2 || ARM64 || COMPILE_TEST

	help

	  Say Y here if you want to enable PCIe controller support on Altera

drivers/pci/controller/pcie-altera.c

+26 −2
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include <linux/interrupt.h>

#include <linux/irqchip/chained_irq.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>
@@ -705,6 +706,13 @@ static int altera_pcie_init_irq_domain(struct altera_pcie *pcie) 
	return 0;

}



static void altera_pcie_irq_teardown(struct altera_pcie *pcie)

{

	irq_set_chained_handler_and_data(pcie->irq, NULL, NULL);

	irq_domain_remove(pcie->irq_domain);

	irq_dispose_mapping(pcie->irq);

}



static int altera_pcie_parse_dt(struct altera_pcie *pcie)

{

	struct device *dev = &pcie->pdev->dev;
@@ -798,6 +806,7 @@ static int altera_pcie_probe(struct platform_device *pdev) 


	pcie = pci_host_bridge_priv(bridge);

	pcie->pdev = pdev;

	platform_set_drvdata(pdev, pcie);



	match = of_match_device(altera_pcie_of_match, &pdev->dev);

	if (!match)
@@ -855,13 +864,28 @@ static int altera_pcie_probe(struct platform_device *pdev) 
	return ret;

}



static int altera_pcie_remove(struct platform_device *pdev)

{

	struct altera_pcie *pcie = platform_get_drvdata(pdev);

	struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);



	pci_stop_root_bus(bridge->bus);

	pci_remove_root_bus(bridge->bus);

	pci_free_resource_list(&pcie->resources);

	altera_pcie_irq_teardown(pcie);



	return 0;

}



static struct platform_driver altera_pcie_driver = {

	.probe		= altera_pcie_probe,

	.remove		= altera_pcie_remove,

	.driver = {

		.name	= "altera-pcie",

		.of_match_table = altera_pcie_of_match,

		.suppress_bind_attrs = true,

	},

};



builtin_platform_driver(altera_pcie_driver);
 
MODULE_DEVICE_TABLE(of, altera_pcie_of_match);

module_platform_driver(altera_pcie_driver);

MODULE_LICENSE("GPL v2");

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