16  * - The period and duty cycle can't be changed together in one atomic action.
45  * The time base used in the EC is 8MHz, or 125ns. Period and duty cycle are
58 						   int period, int duty)  in ntxec_pwm_set_raw_period_and_duty_cycle()  argument
63 	 * Changes to the period and duty cycle take effect as soon as the  in ntxec_pwm_set_raw_period_and_duty_cycle()
66 	 * duty cycle is fully written. If, in such a case, the old duty cycle  in ntxec_pwm_set_raw_period_and_duty_cycle()
69 	 * To minimize the time between the changes to period and duty cycle  in ntxec_pwm_set_raw_period_and_duty_cycle()
75 		{ NTXEC_REG_DUTY_HIGH, ntxec_reg8(duty >> 8) },  in ntxec_pwm_set_raw_period_and_duty_cycle()
77 		{ NTXEC_REG_DUTY_LOW, ntxec_reg8(duty) },  in ntxec_pwm_set_raw_period_and_duty_cycle()
87 	unsigned int period, duty;  in ntxec_pwm_apply()  local
94 	duty   = min_t(u64, state->duty_cycle, period);  in ntxec_pwm_apply()
97 	duty   /= TIME_BASE_NS;  in ntxec_pwm_apply()
100 	 * Writing a duty cycle of zero puts the device into a state where  in ntxec_pwm_apply()
101 	 * writing a higher duty cycle doesn't result in the brightness that it  in ntxec_pwm_apply()
104 	 * As a workaround, write ENABLE=0 when the duty cycle is zero.  in ntxec_pwm_apply()
105 	 * The case that something has previously set the duty cycle to zero  in ntxec_pwm_apply()
108 	if (state->enabled && duty != 0) {  in ntxec_pwm_apply()
109 		res = ntxec_pwm_set_raw_period_and_duty_cycle(chip, period, duty);  in ntxec_pwm_apply()