[PATCH] PWM: core: make pwm.h header self-contained

[Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>]

The file has references to DIV_ROUND_CLOSEST_ULL and struct device_node,
which so far only worked because of headers previously included.

Fix this to make the header self-contained.

Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
 include/pwm.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/pwm.h b/include/pwm.h
index b90ac1de4220..e3a432b85252 100644
--- a/include/pwm.h
+++ b/include/pwm.h
@@ -3,8 +3,10 @@
 #define __PWM_H
 
 #include <dt-bindings/pwm/pwm.h>
+#include <linux/math.h>
 #include <errno.h>
 
+struct device_node;
 struct pwm_device;
 struct device;
 
-- 
2.39.2