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memory: tegra20-emc: Make driver modular 

Add modularization support to the Tegra20 EMC driver, which now can be
compiled as a loadable kernel module.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20201104164923.21238-34-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Dmitry Osipenko 2020-11-04 19:49:09 +03:00 committed by Krzysztof Kozlowski
parent 06f079816d
commit 0260979b01
2 changed files with 13 additions and 6 deletions
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2
drivers/memory/tegra/Kconfig
View File

@ -9,7 +9,7 @@ config TEGRA_MC
NVIDIA Tegra SoCs.
config TEGRA20_EMC
bool "NVIDIA Tegra20 External Memory Controller driver"
tristate "NVIDIA Tegra20 External Memory Controller driver"
default y
depends on ARCH_TEGRA_2x_SOC
help

17
drivers/memory/tegra/tegra20-emc.c
View File

@ -721,6 +721,13 @@ static int tegra_emc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, emc);
tegra_emc_debugfs_init(emc);
/*
* Don't allow the kernel module to be unloaded. Unloading adds some
* extra complexity which doesn't really worth the effort in a case of
* this driver.
*/
try_module_get(THIS_MODULE);
return 0;
unset_cb:
@ -733,6 +740,7 @@ static const struct of_device_id tegra_emc_of_match[] = {
{ .compatible = "nvidia,tegra20-emc", },
{},
};
MODULE_DEVICE_TABLE(of, tegra_emc_of_match);
static struct platform_driver tegra_emc_driver = {
.probe = tegra_emc_probe,
@ -742,9 +750,8 @@ static struct platform_driver tegra_emc_driver = {
.suppress_bind_attrs = true,
},
};
module_platform_driver(tegra_emc_driver);
static int __init tegra_emc_init(void)
{
return platform_driver_register(&tegra_emc_driver);
}
subsys_initcall(tegra_emc_init);
MODULE_AUTHOR("Dmitry Osipenko <digetx@gmail.com>");
MODULE_DESCRIPTION("NVIDIA Tegra20 EMC driver");
MODULE_LICENSE("GPL v2");