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PCI: microchip: Enable building driver as a module

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Enable building driver as a module. The expected use case is the
driver is built as a module, is installed when needed, and cannot be
removed once installed since it is not possible to clean-up
the irq_chip data structures on removal, as described in:

https://lore.kernel.org/linux-pci/87y1wgbah8.wl-maz@kernel.org/

The driver has .suppress_bind_attrs set to true for the same
reasons (ie prevent unbinding, that would leave the kernel
with stale IRQ configuration that cannot be cleaned up).

Link: https://lore.kernel.org/linux-pci/87y1wgbah8.wl-maz@kernel.org/
Link: https://lore.kernel.org/r/20230728131401.1615724-3-daire.mcnamara@microchip.com
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Daire McNamara 2023-07-28 14:13:56 +01:00 committed by Lorenzo Pieralisi
parent 6d473a5a26
commit 2e245bc8a2
2 changed files with 2 additions and 1 deletions
drivers/pci/controller
Kconfigpcie-microchip-host.c

2
drivers/pci/controller/Kconfig

@ -217,7 +217,7 @@ config PCIE_MT7621
This selects a driver for the MediaTek MT7621 PCIe Controller.
config PCIE_MICROCHIP_HOST
bool "Microchip AXI PCIe controller"
tristate "Microchip AXI PCIe controller"
depends on PCI_MSI && OF
select PCI_HOST_COMMON
help

1
drivers/pci/controller/pcie-microchip-host.c

@ -1135,5 +1135,6 @@ static struct platform_driver mc_pcie_driver = {
};
builtin_platform_driver(mc_pcie_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Microchip PCIe host controller driver");
MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>");