linux-imx

/*

 * The Network Space v2 dual-GPIO LED is wired to a CPLD. Three different LED

 * modes are available: off, on and SATA activity blinking. The LED modes are

 * controlled through two GPIOs (command and slow): each combination of values

 * for the command/slow GPIOs corresponds to a LED mode.

 */

​

struct ns2_led_data {

    struct led_classdev cdev;

    bool            can_sleep;

    unsigned char       sata; /* True when SATA mode active. */

    rwlock_t        rw_lock; /* Lock GPIOs. */

    int         num_modes;

    struct ns2_led_modval   *modval;

};

​

static int ns2_led_get_mode(struct ns2_led_data *led_dat,

                enum ns2_led_modes *mode)

{