pwm: Don't export pwm_capture()

There is only a single caller of this function, and that's in
drivers/pwm/core.c itself. So don't export the function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/20240712171821.1470833-2-u.kleine-koenig@baylibre.comSigned-off-by: Uwe Kleine-König <ukleinek@kernel.org>

drivers/pwm/core.c

@@ -325,8 +325,8 @@ EXPORT_SYMBOL_GPL(pwm_adjust_config);
  *
  * Returns: 0 on success or a negative error code on failure.
  */
-int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
-		unsigned long timeout)
+static int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
+		       unsigned long timeout)
 {
 	if (!pwm || !pwm->chip->ops)
 		return -EINVAL;
@@ -338,7 +338,6 @@ int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
 
 	return pwm->chip->ops->capture(pwm->chip, pwm, result, timeout);
 }
-EXPORT_SYMBOL_GPL(pwm_capture);
 
 static struct pwm_chip *pwmchip_find_by_name(const char *name)
 {

include/linux/pwm.h

@@ -394,9 +394,6 @@ static inline bool pwm_might_sleep(struct pwm_device *pwm)
 }
 
 /* PWM provider APIs */
-int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
-		unsigned long timeout);
-
 void pwmchip_put(struct pwm_chip *chip);
 struct pwm_chip *pwmchip_alloc(struct device *parent, unsigned int npwm, size_t sizeof_priv);
 struct pwm_chip *devm_pwmchip_alloc(struct device *parent, unsigned int npwm, size_t sizeof_priv);
@@ -462,13 +459,6 @@ static inline void pwm_disable(struct pwm_device *pwm)
 	might_sleep();
 }
 
-static inline int pwm_capture(struct pwm_device *pwm,
-			      struct pwm_capture *result,
-			      unsigned long timeout)
-{
-	return -EINVAL;
-}
-
 static inline void pwmchip_put(struct pwm_chip *chip)
 {
 }