DevKit8500D/A User Manual - DMCS Pages for Students

#ifdef CONFIG_LEDS_GPIO_PLATFORM
if (ret)
platform_driver_unregister(&gpio_led_driver);
#endif
}
return ret;
static void __exit gpio_led_exit(void)
{
#ifdef CONFIG_LEDS_GPIO_PLATFORM
platform_driver_unregister(&gpio_led_driver);
#endif
#ifdef CONFIG_LEDS_GPIO_OF
of_unregister_platform_driver(&of_gpio_leds_driver);
#endif
}
module_init(gpio_led_init);
module_exit(gpio_led_exit);
MODULE_AUTHOR("Raphael Assenat , Trent Piepho
");
MODULE_DESCRIPTION("GPIO LED driver");
MODULE_LICENSE("GPL");
b) Called platform_driver_register to register gpio_leds. Apply GPIO and called
led_classdev_regisiter to register led_classdev.
static int __devinit gpio_led_probe(struct platform_device *pdev)
{
…
leds_data = kzalloc(sizeof(struct gpio_led_data) * pdata->num_leds,
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