Commit 4a6eac2b authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Bartosz Golaszewski
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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: default avatarDmitry Osipenko <digetx@gmail.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
parent 66f7aaa4

drivers/gpio/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/gpio/gpio-tegra.c

+9 −6
Original line number Diff line number Diff line
@@ -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,

};



static int __init tegra_gpio_init(void)

{

	return platform_driver_register(&tegra_gpio_driver);

}

subsys_initcall(tegra_gpio_init);
 
module_platform_driver(tegra_gpio_driver);



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");