PWM_PERIOD_MASK    32 drivers/pwm/pwm-hibvt.c #define PWM_PERIOD_MASK     GENMASK(31, 0)
PWM_PERIOD_MASK    25 drivers/pwm/pwm-mtk-disp.c #define PWM_PERIOD_MASK		((1 << PWM_PERIOD_BIT_WIDTH) - 1)