diff mbox series

[12/14] pwm: sprd: Refuse requests with unsupported polarity

Message ID 20210319102852.101209-13-u.kleine-koenig@pengutronix.de
State Rejected
Headers show
Series pwm: Patches I consider ready for the next merge window | expand

Commit Message

Uwe Kleine-König March 19, 2021, 10:28 a.m. UTC 
The driver only supports normal polarity and so should refuse requests
for inversed polarity.

Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Link: https://lore.kernel.org/r/20210312085916.386422-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/pwm/pwm-sprd.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pwm/pwm-sprd.c b/drivers/pwm/pwm-sprd.c
index 108cbec88667..98c479dfae31 100644
--- a/drivers/pwm/pwm-sprd.c
+++ b/drivers/pwm/pwm-sprd.c
@@ -164,6 +164,9 @@  static int sprd_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	struct pwm_state *cstate = &pwm->state;
 	int ret;
 
+	if (state->polarity != PWM_POLARITY_NORMAL)
+		return -EINVAL;
+
 	if (state->enabled) {
 		if (!cstate->enabled) {
 			/*