[android] 엑스페리아 레이.. 자동 밝기 설정

루팅된 폰만 가능..

기본다이얼러에서.. *#*#7378423#*#*  -> Service tests -> Ambient Light Sensor 에서 값이 바뀌는지 확인.

root explorer 등으로.. 다음 파일 수정
file: /system/etc/hw_config.sh

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# LMU AS3676 Configuration
dev=/sys/devices/i2c-0/0-0040/leds/
echo 0,0,0,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]
echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h
echo 12900 > $dev/torch/max_current

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3번째 줄을 바꾼다..

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# LMU AS3676 Configuration
dev=/sys/devices/i2c-0/0-0040/leds/
echo 1,1,1,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]
echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h
echo 12900 > $dev/torch/max_current

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