pwm: Drop legacy wrapper for changing polarity

The API to configure a PWM using pwm_enable(), pwm_disable(),
pwm_config() and pwm_set_polarity() is superseeded by atomically setting
the parameters using pwm_apply_state(). To get forward with deprecating
the former set of functions use the opportunity that there is no current
user of pwm_set_polarity() and remove it.

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

1 files changed, 0 insertions, 42 deletions

diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 56518adc31dd..d5199b507d79 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -349,42 +349,6 @@ static inline int pwm_config(struct pwm_device *pwm, int duty_ns,
 }
 
 /**
- * pwm_set_polarity() - configure the polarity of a PWM signal
- * @pwm: PWM device
- * @polarity: new polarity of the PWM signal
- *
- * Note that the polarity cannot be configured while the PWM device is
- * enabled.
- *
- * Returns: 0 on success or a negative error code on failure.
- */
-static inline int pwm_set_polarity(struct pwm_device *pwm,
-                                   enum pwm_polarity polarity)
-{
-        struct pwm_state state;
-
-        if (!pwm)
-                return -EINVAL;
-
-        pwm_get_state(pwm, &state);
-        if (state.polarity == polarity)
-                return 0;
-
-        /*
-         * Changing the polarity of a running PWM without adjusting the
-         * dutycycle/period value is a bit risky (can introduce glitches).
-         * Return -EBUSY in this case.
-         * Note that this is allowed when using pwm_apply_state() because
-         * the user specifies all the parameters.
-         */
-        if (state.enabled)
-                return -EBUSY;
-
-        state.polarity = polarity;
-        return pwm_apply_state(pwm, &state);
-}
-
-/**
  * pwm_enable() - start a PWM output toggling
  * @pwm: PWM device
  *
@@ -483,12 +447,6 @@ static inline int pwm_capture(struct pwm_device *pwm,
         return -EINVAL;
 }
 
-static inline int pwm_set_polarity(struct pwm_device *pwm,
-                                   enum pwm_polarity polarity)
-{
-        return -ENOTSUPP;
-}
-
 static inline int pwm_enable(struct pwm_device *pwm)
 {
         return -EINVAL;