From: Dmitry Osipenko Date: Wed, 4 Nov 2020 16:49:09 +0000 (+0300) Subject: memory: tegra20-emc: Make driver modular X-Git-Tag: v5.15~2143^2~3^2~15 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0260979b018faaf90ff5a7bb04ac3f38e9dee6e3;p=platform%2Fkernel%2Flinux-starfive.git 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 Acked-by: Thierry Reding Link: https://lore.kernel.org/r/20201104164923.21238-34-digetx@gmail.com Signed-off-by: Krzysztof Kozlowski --- diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig index b38e525..ff42674 100644 --- a/drivers/memory/tegra/Kconfig +++ b/drivers/memory/tegra/Kconfig @@ -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 diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index c9fe58a..88619e3 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -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 "); +MODULE_DESCRIPTION("NVIDIA Tegra20 EMC driver"); +MODULE_LICENSE("GPL v2");