1root { 2 backlightConfig { 3 pwmBacklightConfig { 4 match_attr = "pwm_bl_dev"; 5 pwmDevNum = 1; 6 pwmMaxPeriod = 25000; 7 backlightDevName = "hdf_pwm"; 8 minBrightness = 0; 9 defBrightness = 127; 10 maxBrightness = 255; 11 } 12 } 13}