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| author | Bichao Zheng <bichao.zheng@amlogic.com> | 2019-04-01 20:18:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:50:47 +0100 |
| commit | e2db9f3a36eb12860135b07f37fb181172998c1f (patch) | |
| tree | 4923a0cf5b6fac9dec2c831fef290d534ce5779d /drivers/pwm | |
| parent | 8d029e818d2dfb59de03b22924bd7d8b731a649f (diff) | |
| download | linux-stable-e2db9f3a36eb12860135b07f37fb181172998c1f.tar.gz linux-stable-e2db9f3a36eb12860135b07f37fb181172998c1f.tar.bz2 linux-stable-e2db9f3a36eb12860135b07f37fb181172998c1f.zip | |
pwm: meson: Don't disable PWM when setting duty repeatedly
[ Upstream commit a279345807e1e0ae79567a52cfdd9d30c9174a3c ]
There is an abnormally low about 20ms,when setting duty repeatedly.
Because setting the duty will disable PWM and then enable. Delete
this operation now.
Fixes: 211ed630753d2f ("pwm: Add support for Meson PWM Controller")
Signed-off-by: Bichao Zheng <bichao.zheng@amlogic.com>
[ Dropped code instead of hiding it behind a comment ]
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-meson.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c index 4b708c1fcb1d..e247ab632530 100644 --- a/drivers/pwm/pwm-meson.c +++ b/drivers/pwm/pwm-meson.c @@ -325,11 +325,6 @@ static int meson_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, if (state->period != channel->state.period || state->duty_cycle != channel->state.duty_cycle || state->polarity != channel->state.polarity) { - if (channel->state.enabled) { - meson_pwm_disable(meson, pwm->hwpwm); - channel->state.enabled = false; - } - if (state->polarity != channel->state.polarity) { if (state->polarity == PWM_POLARITY_NORMAL) meson->inverter_mask |= BIT(pwm->hwpwm); |