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39 lines
1.3 KiB
Diff
39 lines
1.3 KiB
Diff
From 764701e2399b2fa66991e4339e3735a836203c87 Mon Sep 17 00:00:00 2001
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From: hzy <hzyitc@outlook.com>
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Date: Sat, 18 Nov 2023 01:22:04 +0800
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Subject: [PATCH] Revert "pwm: meson: modify and simplify calculation in meson_pwm_get_state"
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This reverts commit 6b9352f3f8a1a35faf0efc1ad1807ee303467796.
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---
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drivers/pwm/pwm-meson.c | 14 ++++++++++++--
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1 file changed, 12 insertions(+), 2 deletions(-)
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diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
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index 25519cdd..63cf9719 100644
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--- a/drivers/pwm/pwm-meson.c
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+++ b/drivers/pwm/pwm-meson.c
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@@ -322,8 +322,18 @@ static int meson_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
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channel->lo = FIELD_GET(PWM_LOW_MASK, value);
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channel->hi = FIELD_GET(PWM_HIGH_MASK, value);
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- state->period = meson_pwm_cnt_to_ns(chip, pwm, channel->lo + channel->hi);
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- state->duty_cycle = meson_pwm_cnt_to_ns(chip, pwm, channel->hi);
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+ if (channel->lo == 0) {
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+ state->period = meson_pwm_cnt_to_ns(chip, pwm, channel->hi);
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+ state->duty_cycle = state->period;
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+ } else if (channel->lo >= channel->hi) {
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+ state->period = meson_pwm_cnt_to_ns(chip, pwm,
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+ channel->lo + channel->hi);
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+ state->duty_cycle = meson_pwm_cnt_to_ns(chip, pwm,
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+ channel->hi);
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+ } else {
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+ state->period = 0;
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+ state->duty_cycle = 0;
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+ }
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state->polarity = PWM_POLARITY_NORMAL;
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--
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2.34.1
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