diff options
Diffstat (limited to 'drivers/pwm/pwm-jz4740.c')
| -rw-r--r-- | drivers/pwm/pwm-jz4740.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-jz4740.c b/drivers/pwm/pwm-jz4740.c index e73ee72df09d..2e4ecc061dd2 100644 --- a/drivers/pwm/pwm-jz4740.c +++ b/drivers/pwm/pwm-jz4740.c @@ -72,7 +72,15 @@ static void jz4740_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) { uint32_t ctrl = jz4740_timer_get_ctrl(pwm->hwpwm); - /* Disable PWM output. + /* + * Set duty > period. This trick allows the TCU channels in TCU2 mode to + * properly return to their init level. + */ + jz4740_timer_set_duty(pwm->hwpwm, 0xffff); + jz4740_timer_set_period(pwm->hwpwm, 0x0); + + /* + * Disable PWM output. * In TCU2 mode (channel 1/2 on JZ4750+), this must be done before the * counter is stopped, while in TCU1 mode the order does not matter. */ |