blob: 5ab82e5bb0d7aea7a2932ba72785335077951b85 [file] [log] [blame]
* LED support is strange, with the NEW_LEDS, LEDS_CLASS and LEDS_TRIGGERS
* Kconfig symbols ... If any of them are not defined, we build our
* "compatibility" code that really just makes it all non-working but
* allows compilation.
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/rwsem.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#define led_classdev LINUX_BACKPORT(led_classdev)
#define led_trigger LINUX_BACKPORT(led_trigger)
struct led_classdev {
const char *name;
enum led_brightness brightness;
enum led_brightness max_brightness;
int flags;
/* Lower 16 bits reflect status */
#define LED_SUSPENDED (1 << 0)
/* Upper 16 bits reflect control information */
#define LED_CORE_SUSPENDRESUME (1 << 16)
#define LED_BLINK_ONESHOT (1 << 17)
#define LED_BLINK_ONESHOT_STOP (1 << 18)
#define LED_BLINK_INVERT (1 << 19)
#define LED_SYSFS_DISABLE (1 << 20)
#define SET_BRIGHTNESS_ASYNC (1 << 21)
#define SET_BRIGHTNESS_SYNC (1 << 22)
#define LED_DEV_CAP_FLASH (1 << 23)
/* Set LED brightness level */
/* Must not sleep, use a workqueue if needed */
void (*brightness_set)(struct led_classdev *led_cdev,
enum led_brightness brightness);
* Set LED brightness level immediately - it can block the caller for
* the time required for accessing a LED device register.
int (*brightness_set_sync)(struct led_classdev *led_cdev,
enum led_brightness brightness);
/* Get LED brightness level */
enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
* Activate hardware accelerated blink, delays are in milliseconds
* and if both are zero then a sensible default should be chosen.
* The call should adjust the timings in that case and if it can't
* match the values specified exactly.
* Deactivate blinking again when the brightness is set to a fixed
* value via the brightness_set() callback.
int (*blink_set)(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off);
struct device *dev;
const struct attribute_group **groups;
struct list_head node; /* LED Device list */
const char *default_trigger; /* Trigger to use */
unsigned long blink_delay_on, blink_delay_off;
struct timer_list blink_timer;
int blink_brightness;
void (*flash_resume)(struct led_classdev *led_cdev);
struct work_struct set_brightness_work;
int delayed_set_value;
/* Protects the trigger data below */
struct rw_semaphore trigger_lock;
struct led_trigger *trigger;
struct list_head trig_list;
void *trigger_data;
/* true if activated - deactivate routine uses it to do cleanup */
bool activated;
/* Ensures consistent access to the LED Flash Class device */
struct mutex led_access;
struct led_trigger {
const char *name;
void (*activate)(struct led_classdev *led_cdev);
void (*deactivate)(struct led_classdev *led_cdev);
rwlock_t leddev_list_lock;
struct list_head led_cdevs;
struct list_head next_trig;
#undef led_classdev_register
#define led_classdev_register LINUX_BACKPORT(led_classdev_register)
#undef led_classdev_unregister
#define led_classdev_unregister LINUX_BACKPORT(led_classdev_unregister)
#undef led_blink_set
#define led_blink_set LINUX_BACKPORT(led_blink_set)
#undef led_set_brightness
#define led_set_brightness LINUX_BACKPORT(led_set_brightness)
#undef led_classdev_suspend
#define led_classdev_suspend LINUX_BACKPORT(led_classdev_suspend)
#undef led_classdev_resume
#define led_classdev_resume LINUX_BACKPORT(led_classdev_resume)
#undef led_trigger_register
#define led_trigger_register LINUX_BACKPORT(led_trigger_register)
#undef led_trigger_unregister
#define led_trigger_unregister LINUX_BACKPORT(led_trigger_unregister)
#undef led_trigger_register_simple
#define led_trigger_register_simple LINUX_BACKPORT(led_trigger_register_simple)
#undef led_trigger_unregister_simple
#define led_trigger_unregister_simple LINUX_BACKPORT(led_trigger_unregister_simple)
#undef led_trigger_event
#define led_trigger_event LINUX_BACKPORT(led_trigger_event)
#define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
static inline int led_classdev_register(struct device *parent,
struct led_classdev *led_cdev)
return 0;
static inline void led_classdev_unregister(struct led_classdev *led_cdev)
static inline void led_trigger_register_simple(const char *name,
struct led_trigger **trigger)
static inline void led_trigger_unregister_simple(struct led_trigger *trigger)
static inline void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
static inline void led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
static inline void led_classdev_suspend(struct led_classdev *led_cdev)
static inline void led_classdev_resume(struct led_classdev *led_cdev)
static inline int led_trigger_register(struct led_trigger *trigger)
return 0;
static inline void led_trigger_unregister(struct led_trigger *trigger)
static inline void led_trigger_event(struct led_trigger *trigger,
enum led_brightness event)
static inline void led_trigger_blink(struct led_trigger *trigger,
unsigned long *delay_on,
unsigned long *delay_off)
static inline void led_trigger_blink_oneshot(struct led_trigger *trigger,
unsigned long *delay_on,
unsigned long *delay_off,
int invert)