From: Pascal Roeleven <dev@pascalroeleven.nl>
To: Roman Beranek <roman.beranek@prusa3d.cz>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Emil Lenngren" <emil.lenngren@gmail.com>,
"Lee Jones" <lee.jones@linaro.org>,
"Maxime Ripard" <mripard@kernel.org>,
"Chen-Yu Tsai" <wens@csie.org>,
linux-pwm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-sunxi@lists.linux.dev, linux-sunxi@googlegroups.com
Subject: Re: [PATCH 6/6] pwm: sun4i: don't delay if the PWM is already off
Date: Thu, 10 Jun 2021 15:41:15 +0200 [thread overview]
Message-ID: <f590094496dfbb711e363c36e8573687@pascalroeleven.nl> (raw)
In-Reply-To: <20210531044608.1006024-7-roman.beranek@prusa3d.com>
On 2021-05-31 06:46, Roman Beranek wrote:
> Signed-off-by: Roman Beranek <roman.beranek@prusa3d.com>
> ---
> drivers/pwm/pwm-sun4i.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
> index 6ab06b9749d0..88bd90498d1f 100644
> --- a/drivers/pwm/pwm-sun4i.c
> +++ b/drivers/pwm/pwm-sun4i.c
> @@ -304,7 +304,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip,
> struct pwm_device *pwm,
>
> sun4i_pwm_writel(sun4i_pwm, ctrl, PWM_CTRL_REG);
>
> - if (state->enabled) {
> + if (state->enabled || !cstate.enabled) {
> mutex_unlock(&sun4i_pwm->ctrl_lock);
> return 0;
> }
Btw, this now leaves the gate open if the controller is currently
disabled and we are only changing the period register and staying
disabled. This becomes an issue because we always expect the gate to be
disabled when the controller is disabled.
Regards,
Pascal
next prev parent reply other threads:[~2021-06-10 13:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-31 4:46 [PATCH 0/6] pwm: sun4i: only wait 2 cycles prior to disabling Roman Beranek
2021-05-31 4:46 ` [PATCH 1/6] pwm: sun4i: enable clk prior to getting its rate Roman Beranek
2021-06-07 8:00 ` Uwe Kleine-König
2021-05-31 4:46 ` [PATCH 2/6] pwm: sun4i: disable EN bit prior to the delay Roman Beranek
2021-06-07 8:07 ` Uwe Kleine-König
2021-05-31 4:46 ` [PATCH 3/6] pwm: sun4i: replace spinlock with a mutex Roman Beranek
2021-05-31 4:46 ` [PATCH 4/6] pwm: sun4i: simplify calculation of the delay time Roman Beranek
2021-05-31 4:46 ` [PATCH 5/6] pwm: sun4i: shorten the delay to 2 cycles Roman Beranek
2021-05-31 4:46 ` [PATCH 6/6] pwm: sun4i: don't delay if the PWM is already off Roman Beranek
2021-06-10 13:41 ` Pascal Roeleven [this message]
2021-05-31 19:07 ` [PATCH 0/6] pwm: sun4i: only wait 2 cycles prior to disabling Pascal Roeleven
2021-05-31 20:01 ` Emil Lenngren
2021-05-31 20:20 ` Pascal Roeleven
2021-06-08 12:28 ` Pascal Roeleven
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f590094496dfbb711e363c36e8573687@pascalroeleven.nl \
--to=dev@pascalroeleven.nl \
--cc=emil.lenngren@gmail.com \
--cc=lee.jones@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-pwm@vger.kernel.org \
--cc=linux-sunxi@googlegroups.com \
--cc=linux-sunxi@lists.linux.dev \
--cc=mripard@kernel.org \
--cc=roman.beranek@prusa3d.cz \
--cc=thierry.reding@gmail.com \
--cc=u.kleine-koenig@pengutronix.de \
--cc=wens@csie.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).