OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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: Ley Foon Tan <ley.foon.tan@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Ley Foon Tan 2019-04-24 12:57:14 +08:00 committed by Lorenzo Pieralisi
parent a188339ca5
commit ec15c4d0d5
2 changed files with 27 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pci/controller/Kconfig
View File

@ -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

28
drivers/pci/controller/pcie-altera.c
View File

@ -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");