From: Heiner Kallweit <hkallweit1@gmail.com>
To: "Jerome Brunet" <jbrunet@baylibre.com>,
"Martin Blumenstingl" <martin.blumenstingl@googlemail.com>,
"Neil Armstrong" <narmstrong@baylibre.com>,
"Kevin Hilman" <khilman@baylibre.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>
Cc: "linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"open list:ARM/Amlogic Meson..."
<linux-amlogic@lists.infradead.org>,
linux-pwm@vger.kernel.org
Subject: [PATCH] pwm: pwm-meson: remove not needed check in meson_pwm_calc
Date: Thu, 4 May 2023 07:35:55 +0200 [thread overview]
Message-ID: <d2aa9fa6-4513-c3e8-493a-3a34d5a1143b@gmail.com> (raw)
duty <= period implies that duty_cnt <= cnt. We verified before
that cnt <= 0xffff, therefore we can omit the check here.
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
Note: Applies only after "pwm: pwm-meson: fix handling of period/duty if greater than UINT_MAX"
---
drivers/pwm/pwm-meson.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 33107204a..aad4a0ed3 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -204,12 +204,7 @@ static int meson_pwm_calc(struct meson_pwm *meson, struct pwm_device *pwm,
channel->hi = 0;
channel->lo = cnt;
} else {
- /* Then check is we can have the duty with the same pre_div */
duty_cnt = div64_u64(fin_freq * duty, NSEC_PER_SEC * (pre_div + 1));
- if (duty_cnt > 0xffff) {
- dev_err(meson->chip.dev, "unable to get duty cycle\n");
- return -EINVAL;
- }
dev_dbg(meson->chip.dev, "duty=%llu pre_div=%u duty_cnt=%u\n",
duty, pre_div, duty_cnt);
--
2.40.1
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next reply other threads:[~2023-05-04 5:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-04 5:35 Heiner Kallweit [this message]
2023-05-04 6:47 ` [PATCH] pwm: pwm-meson: remove not needed check in meson_pwm_calc Uwe Kleine-König
2023-05-04 9:11 ` Thierry Reding
2023-05-04 9:42 ` Uwe Kleine-König
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