sugar/linux
1
0
Fork 0
Code Activity

pwm: Check actual period and duty_cycle for ignored polarity test

Browse Source 
When a lowlevel driver configures the wrong period that might
(historically) be ok if the emitted signal has a 100% relative duty_cycle
as that just corresponds to rounding down the duty_cycle to 0 which is an
allowed thing to do for a lowlevel driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/bc511c0250ea2f6390e4209ab1ea9c08a3c18612.1751994988.git.u.kleine-koenig@baylibre.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
This commit is contained in:
Uwe Kleine-König
2025-07-08 19:18:01 +02:00
committed by Uwe Kleine-König
parent 5364e70b01
commit b871d093f1
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/pwm/core.c
View File

@@ -536,7 +536,7 @@ static void pwm_apply_debug(struct pwm_device *pwm,
}
if (s2.polarity != state->polarity &&
state->duty_cycle < state->period)
s2.duty_cycle < s2.period)
dev_warn(pwmchip_parent(chip), ".apply ignored .polarity\n");
if (last->polarity == state->polarity &&