diff mbox series

[5/5] gpio: mvebu: document zero pwm duty cycle limitation

Message ID fa809a148e2a008c124677d61ea4ecba55cea7d0.1610362661.git.baruch@tkos.co.il
State New
Headers show
Series gpio: mvebu: pwm fixes and improvements | expand

Commit Message

Baruch Siach Jan. 11, 2021, 11:17 a.m. UTC 
Add a comment on why the code never sets the 'on' register to zero.

Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
---
 drivers/gpio/gpio-mvebu.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index eb7456fa6d86..4261e3b22b4e 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -706,6 +706,7 @@  static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	val = DIV_ROUND_UP_ULL(val, NSEC_PER_SEC);
 	if (val > UINT_MAX)
 		return -EINVAL;
+	/* zero 'on' value does not work as expected for some reason */
 	if (val)
 		on = val;
 	else