This patch adds modularization support to the Tegra20 EMC driver. Driver
now can be compiled as a loadable kernel module.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/memory/tegra/Kconfig | 2 +-
drivers/memory/tegra/tegra20-emc.c | 16 +++++++++++-----
2 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig
index 9f0a96bf9ccc..7e0e1ef87763 100644
--- a/drivers/memory/tegra/Kconfig
+++ b/drivers/memory/tegra/Kconfig
@@ -8,7 +8,7 @@ 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 027f46287dbf..035d9251e28a 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -724,6 +724,13 @@ 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:
@@ -736,6 +743,7 @@ 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,
@@ -745,9 +753,7 @@ 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_DESCRIPTION("NVIDIA Tegra20 EMC driver");
+MODULE_LICENSE("GPL v2");
--
2.26.0
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