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gpio: tegra: Support building driver as a loadable module 

Support building driver as a loadable kernel module. This allows to
reduce size of a kernel zImage, which is important for some devices
since size of kernel partition may be limited and since some bootloader
variants have known problems in regards to the initrd placement if kernel
image is too big.

$ lsmod
Module                  Size  Used by
gpio_tegra             16384  27

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Dmitry Osipenko 2021-01-22 21:55:43 +03:00 committed by Bartosz Golaszewski
parent 66f7aaa448
commit 4a6eac2b4b
2 changed files with 9 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpio/Kconfig
View File

@ -595,7 +595,7 @@ config GPIO_TB10X
select OF_GPIO
config GPIO_TEGRA
bool "NVIDIA Tegra GPIO support"
tristate "NVIDIA Tegra GPIO support"
default ARCH_TEGRA
depends on ARCH_TEGRA || COMPILE_TEST
depends on OF_GPIO

13
drivers/gpio/gpio-tegra.c
View File

@ -802,6 +802,7 @@ static const struct of_device_id tegra_gpio_of_match[] = {
{ .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },
{ },
};
MODULE_DEVICE_TABLE(of, tegra_gpio_of_match);
static struct platform_driver tegra_gpio_driver = {
.driver = {
@ -811,9 +812,11 @@ static struct platform_driver tegra_gpio_driver = {
},
.probe = tegra_gpio_probe,
};
module_platform_driver(tegra_gpio_driver);
static int __init tegra_gpio_init(void)
{
return platform_driver_register(&tegra_gpio_driver);
}
subsys_initcall(tegra_gpio_init);
MODULE_DESCRIPTION("NVIDIA Tegra GPIO controller driver");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
MODULE_AUTHOR("Erik Gilling <konkers@google.com>");
MODULE_LICENSE("GPL v2");