diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2020-11-11 04:14:37 +0300 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzk@kernel.org> | 2020-11-26 18:50:36 +0100 |
| commit | 0c56eda86f8cad705d7d14e81e0e4efaeeaf4613 (patch) | |
| tree | 12f6cc72a0fb07c8dd6bab273d2404d098e94e64 | |
| parent | 1d1564aabc697d53f19ef40b06d68dc8bde36ad4 (diff) | |
memory: tegra30-emc: Make driver modular
Add modularization support to the Tegra30 EMC driver, which now can be
compiled as a loadable kernel module.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20201111011456.7875-8-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
| -rw-r--r-- | drivers/memory/tegra/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/memory/tegra/mc.c | 3 | ||||
| -rw-r--r-- | drivers/memory/tegra/tegra30-emc.c | 17 |
3 files changed, 16 insertions, 6 deletions
diff --git a/drivers/memory/tegra/Kconfig b/drivers/memory/tegra/Kconfig index 8cc1ec5be443..2a4a16bcf91c 100644 --- a/drivers/memory/tegra/Kconfig +++ b/drivers/memory/tegra/Kconfig @@ -21,7 +21,7 @@ config TEGRA20_EMC external memory. config TEGRA30_EMC - bool "NVIDIA Tegra30 External Memory Controller driver" + tristate "NVIDIA Tegra30 External Memory Controller driver" default y depends on TEGRA_MC && ARCH_TEGRA_3x_SOC help diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index a7e6a8e4c95a..44064de962c2 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -6,6 +6,7 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/dma-mapping.h> +#include <linux/export.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> @@ -346,6 +347,7 @@ int tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate) return 0; } +EXPORT_SYMBOL_GPL(tegra_mc_write_emem_configuration); unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc) { @@ -357,6 +359,7 @@ unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc) return dram_count; } +EXPORT_SYMBOL_GPL(tegra_mc_get_emem_device_count); static int load_one_timing(struct tegra_mc *mc, struct tegra_mc_timing *timing, diff --git a/drivers/memory/tegra/tegra30-emc.c b/drivers/memory/tegra/tegra30-emc.c index 1be28e28ec34..d0926088360a 100644 --- a/drivers/memory/tegra/tegra30-emc.c +++ b/drivers/memory/tegra/tegra30-emc.c @@ -1330,6 +1330,13 @@ 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: @@ -1380,6 +1387,7 @@ static const struct of_device_id tegra_emc_of_match[] = { { .compatible = "nvidia,tegra30-emc", }, {}, }; +MODULE_DEVICE_TABLE(of, tegra_emc_of_match); static struct platform_driver tegra_emc_driver = { .probe = tegra_emc_probe, @@ -1390,9 +1398,8 @@ 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 Tegra30 EMC driver"); +MODULE_LICENSE("GPL v2"); |