GPIO 接続 LED class device

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struct gpio_led {
        const char *name;
        const char *default_trigger;
        unsigned        gpio;
        unsigned        active_low : 1;
        unsigned        retain_state_suspended : 1;
        unsigned        default_state : 2;
        /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
        struct gpio_desc *gpiod;
};
#define LEDS_GPIO_DEFSTATE_OFF          0
#define LEDS_GPIO_DEFSTATE_ON           1
#define LEDS_GPIO_DEFSTATE_KEEP         2

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struct gpio_led_platform_data {
        int             num_leds;
        const struct gpio_led *leds;
 
#define GPIO_LED_NO_BLINK_LOW   0       /* No blink GPIO state low */
#define GPIO_LED_NO_BLINK_HIGH  1       /* No blink GPIO state high */
#define GPIO_LED_BLINK          2       /* Please, blink */
        int             (*gpio_blink_set)(struct gpio_desc *desc, int state,
                                        unsigned long *delay_on,
                                        unsigned long *delay_off);
};

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struct platform_device {
        const char      *name;
        int             id;
        bool            id_auto;
        struct device   dev;
        u32             num_resources;
        struct resource *resource;
 
        const struct platform_device_id *id_entry;
        char *driver_override; /* Driver name to force a match */
 
        /* MFD cell pointer */
        struct mfd_cell *mfd_cell;
 
        /* arch specific additions */
        struct pdev_archdata    archdata;
};