[PATCH v8 2/6] pwm: add PWM modes

[<Claudiu.Beznea@microchip.com>]

From: Claudiu Beznea <claudiu.beznea@microchip.com>

Add PWM normal and complementary modes.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
 Documentation/pwm.txt | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/pwm.txt b/Documentation/pwm.txt
index 8fbf0aa3ba2d..669fd4c9cc8e 100644
--- a/Documentation/pwm.txt
+++ b/Documentation/pwm.txt
@@ -110,6 +110,28 @@ channel that was exported. The following properties will then be available:
 	- 0 - disabled
 	- 1 - enabled
 
+  mode
+    Get/set PWM channel working mode.
+
+    In the following description PWMx_y refers to output y of PWM with ID x.
+
+    Normal mode - for PWM channels with one output; this should be the
+        default working mode for every PWM channel; output waveforms looks
+        like this:
+              __      __      __      __
+    PWMx   __|  |____|  |____|  |____|  |__
+             ^       ^       ^       ^
+
+    Complementary mode - for PWM channels with two outputs; output waveforms
+        looks line this:
+              __      __      __      __
+    PWMx_0 __|  |____|  |____|  |____|  |__
+           __    ____    ____    ____    __
+    PWMx_1   |__|    |__|    |__|    |__|
+             ^       ^       ^       ^
+
+    Where '^' specifies the beginning of a period.
+
 Implementing a PWM driver
 -------------------------
 
-- 
2.7.4