Nuc980 heartbeat light

make menuconfig Set up

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file location ：

arch ->arm -> Mach-nuc980 Under the dev.c

The header file ：

#include <linux/leds.h>

Code ：

#if defined(CONFIG_LEDS_GPIO)
static struct gpio_led nuc980_leds_gpio] = {
       [0] = { 
              .name                 = "led_heartbeat",
              /*  Pin settings  */
              .gpio                 = NUC980_PB8,
              /*  Trigger level   High or low by default   According to the schematic diagram  */
              .active_low           = 1,
              /*  Trigger mode   Heartbeat triggers  */
              .default_trigger      = "heartbeat",
       },
};
static struct gpio_led_platform_data leds_data = {
    .num_leds = ARRAY_SIZE(nuc980_leds_gpio),
    .leds = nuc980_leds_gpio,
};
 
static struct platform_device nuc980_gpio_leds_device = {
        /*  According to this name Match drive  */
       .name               = "leds-gpio",
       .id                 = -1,
       .dev.platform_data  = &leds_data,
};
#endif

Driver file （ System comes with ）：

\drivers\leds\leds-gpio.c

The registration method is platform driven