mtk led 呼吸灯

LED调用流程
	
	g_leds_data[i]->cdev.blink_set = mt65xx_blink_set; //mt65xx_leds_probe -- leds_drv.c
	mt65xx_blink_set//leds_drv.c
		mt_mt65xx_blink_set
			mt_led_blink_pmic //leds
				external_ic_leds_mode(mode)
			
	mt_brightness_set_pmic//leds
		external_ic_leds_mode(mode)
		
	[   32.422105]  (2)[897:Binder_3][<ffffffc0003bbc40>] AW2015_LED_Blink+0x94/0x198
	[   32.422115]  (2)[897:Binder_3][<ffffffc0003bbf60>] external_ic_leds_mode+0xc8/0xf4
	[   32.422125]  (2)[897:Binder_3][<ffffffc0003ba884>] mt_led_blink_pmic+0x180/0x320
	[   32.422135]  (2)[897:Binder_3][<ffffffc0003bb4a4>] mt_mt65xx_blink_set+0x1d0/0x23c
	[   32.422145]  (2)[897:Binder_3][<ffffffc0003b9758>] mt65xx_blink_set+0x8/0x1c
	[   32.422156]  (2)[897:Binder_3][<ffffffc00076d510>] led_blink_setup+0x2c/0xfc //led-core.c
	[   32.422166]  (2)[897:Binder_3][<ffffffc00076d618>] led_blink_set+0x38/0x48
	[   32.422176]  (2)[897:Binder_3][<ffffffc00076e6fc>] led_delay_on_store+0x38/0x54 //ledtrig-timer.c
	[   32.422187]  (2)[897:Binder_3][<ffffffc00033bfd0>] dev_attr_store+0x14/0x28 //delay_on  -- /sys/devices/platform/leds-mt65xx/leds/red/delay_on
	
	
	
	[  433.441909]  (0)[3408:kworker/0:3][<ffffffc0003bb7fc>] AW2015_LED_ON+0x38/0xec
	[  433.441919]  (0)[3408:kworker/0:3][<ffffffc0003bbf10>] external_ic_leds_mode+0x7c/0xf4
	[  433.441930]  (0)[3408:kworker/0:3][<ffffffc0003badc8>] mt_brightness_set_pmic+0x1f4/0x2ac
	[  433.441940]  (0)[3408:kworker/0:3][<ffffffc0003baf78>] mt_mt65xx_led_set_cust+0xf0/0x28c
	[  433.441950]  (0)[3408:kworker/0:3][<ffffffc0003bb154>] mt_mt65xx_led_work+0x40/0x74
	[  433.441961]  (0)[3408:kworker/0:3][<ffffffc0000b3ea4>] process_one_work+0x154/0x414 //mt_mt65xx_led_set <--mt65xx_led_set <--__led_set_brightness