Commit 5ece02d5 authored by Keith Short's avatar Keith Short Committed by Anas Nashif
Browse files

npcx: fix NPCX PWM driver with PWM_POLARITY_INVERTED 



Update NPCX PWM driver so PWM can be turned off as the first call when
PWM_POLARITY_INVERTED is used.

Signed-off-by: default avatarKeith Short <keithshort@google.com>
parent d6316aae

drivers/pwm/pwm_npcx.c

+4 −4
Original line number Diff line number Diff line
@@ -99,16 +99,16 @@ static int pwm_npcx_pin_set(const struct device *dev, uint32_t pwm, 
	/* Disable PWM before configuring */

	inst->PWMCTL &= ~BIT(NPCX_PWMCTL_PWR);



	/* If pulse_cycles is 0, return directly since PWM is already off */

	if (pulse_cycles == 0)

		return 0;



	/* Select PWM inverted polarity (ie. active-low pulse). */

	if (flags & PWM_POLARITY_INVERTED)

		inst->PWMCTL |= BIT(NPCX_PWMCTL_INVP);

	else

		inst->PWMCTL &= ~BIT(NPCX_PWMCTL_INVP);



	/* If pulse_cycles is 0, return directly since PWM is already off */

	if (pulse_cycles == 0)

		return 0;



	/*

	 * Calculate PWM prescaler that let period_cycles map to

	 * maximum pwm period cycles and won't exceed it.

CRA Git | Maintained and supported by SUSTech CRA and CCSE