Revert "pwm: meson: modify and simplify calculation in meson_pwm_get_state"

This reverts commit 6b9352f3f8a1a35faf0efc1ad1807ee303467796.
---
 drivers/pwm/pwm-meson.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 33107204a951..1d0b69d08cdd 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -351,8 +351,18 @@ static int meson_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
 	channel->lo = FIELD_GET(PWM_LOW_MASK, value);
 	channel->hi = FIELD_GET(PWM_HIGH_MASK, value);
 
-	state->period = meson_pwm_cnt_to_ns(chip, pwm, channel->lo + channel->hi);
-	state->duty_cycle = meson_pwm_cnt_to_ns(chip, pwm, channel->hi);
+	if (channel->lo == 0) {
+		state->period = meson_pwm_cnt_to_ns(chip, pwm, channel->hi);
+		state->duty_cycle = state->period;
+	} else if (channel->lo >= channel->hi) {
+		state->period = meson_pwm_cnt_to_ns(chip, pwm,
+						    channel->lo + channel->hi);
+		state->duty_cycle = meson_pwm_cnt_to_ns(chip, pwm,
+							channel->hi);
+	} else {
+		state->period = 0;
+		state->duty_cycle = 0;
+	}
 
 	state->polarity = PWM_POLARITY_NORMAL;
 
-- 
2.34.1