Add push-pull mode support. In push-pull mode the channels' outputs have
same polarities and the edges are complementary delayed for one period.

Signed-off-by: Claudiu Beznea <claudiu.bez...@microchip.com>
---
 include/linux/pwm.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 0ba416ab2772..765d760ef82d 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -29,11 +29,14 @@ enum pwm_polarity {
  * PWM modes
  * @PWM_MODE_NORMAL_BIT: PWM has one output
  * @PWM_MODE_COMPLEMENTARY_BIT: PWM has 2 outputs with opposite polarities
+ * @PWM_MODE_PUSH_PULL_BIT: PWM has 2 outputs with same polarities and the 
edges
+ * are complementary delayed for one period
  * @PWM_MODE_CNT: PWM modes count
  */
 enum {
        PWM_MODE_NORMAL_BIT,
        PWM_MODE_COMPLEMENTARY_BIT,
+       PWM_MODE_PUSH_PULL_BIT,
        PWM_MODE_CNT,
 };
 
@@ -481,7 +484,11 @@ static inline bool pwm_caps_valid(struct pwm_caps caps)
 
 static inline const char * const pwm_mode_desc(unsigned long mode)
 {
-       static const char * const modes[] = { "normal", "complementary" };
+       static const char * const modes[] = {
+               "normal",
+               "complementary",
+               "push-pull",
+       };
 
        if (!pwm_mode_valid(mode))
                return "invalid";
-- 
2.7.4

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