From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Mon, 1 Mar 2021 18:23:07 +0000 (+0100)
Subject: pwm: Return -EINVAL for old-style drivers without .set_polarity callback
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d58cb0ee51ef58acc80f984407979fd5926da9e5;p=linux.git

pwm: Return -EINVAL for old-style drivers without .set_polarity callback

Since commit 2b1c1a5d5148 ("pwm: Use -EINVAL for unsupported polarity")
all drivers implementing the apply callback are unified to return
-EINVAL if an unsupported polarity is requested. Do the same in the
compat code for old-style drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 8904eaa6d769d..25ee06a14bb33 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -596,7 +596,7 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state)
 		 */
 		if (state->polarity != pwm->state.polarity) {
 			if (!chip->ops->set_polarity)
-				return -ENOTSUPP;
+				return -EINVAL;
 
 			/*
 			 * Changing the polarity of a running PWM is