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PCI: aardvark: Implement driver 'remove' function and allow to build it as module

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Providing driver's 'remove' function allows kernel to bind and unbind devices
from aardvark driver. It also allows to build aardvark driver as a module.

Compiling aardvark as a module simplifies development and debugging of
this driver as it can be reloaded at runtime without the need to reboot
to new kernel.

Link: https://lore.kernel.org/r/20200907111038.5811-5-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
This commit is contained in:
Pali Rohár 2020-09-07 13:10:37 +02:00 committed by Lorenzo Pieralisi
parent d39ff8ee9f
commit 526a76991b
2 changed files with 25 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/pci/controller/Kconfig
View file

@ -12,7 +12,7 @@ config PCI_MVEBU
select PCI_BRIDGE_EMUL
config PCI_AARDVARK
bool "Aardvark PCIe controller"
tristate "Aardvark PCIe controller"
depends on (ARCH_MVEBU && ARM64) || COMPILE_TEST
depends on OF
depends on PCI_MSI_IRQ_DOMAIN

27
drivers/pci/controller/pci-aardvark.c
View file

@ -14,6 +14,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/phy/phy.h>
@ -1121,6 +1122,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
pcie = pci_host_bridge_priv(bridge);
pcie->pdev = pdev;
platform_set_drvdata(pdev, pcie);
pcie->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pcie->base))
@ -1198,18 +1200,37 @@ static int advk_pcie_probe(struct platform_device *pdev)
return 0;
}
static int advk_pcie_remove(struct platform_device *pdev)
{
struct advk_pcie *pcie = platform_get_drvdata(pdev);
struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
pci_lock_rescan_remove();
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
pci_unlock_rescan_remove();
advk_pcie_remove_msi_irq_domain(pcie);
advk_pcie_remove_irq_domain(pcie);
return 0;
}
static const struct of_device_id advk_pcie_of_match_table[] = {
{ .compatible = "marvell,armada-3700-pcie", },
{},
};
MODULE_DEVICE_TABLE(of, advk_pcie_of_match_table);
static struct platform_driver advk_pcie_driver = {
.driver = {
.name = "advk-pcie",
.of_match_table = advk_pcie_of_match_table,
/* Driver unloading/unbinding currently not supported */
.suppress_bind_attrs = true,
},
.probe = advk_pcie_probe,
.remove = advk_pcie_remove,
};
builtin_platform_driver(advk_pcie_driver);
module_platform_driver(advk_pcie_driver);
MODULE_DESCRIPTION("Aardvark PCIe controller");
MODULE_LICENSE("GPL v2");