Define bindings for pwm-stm32

version 2:
- use parameters instead of compatible of handle the hardware configuration

Signed-off-by: Benjamin Gaignard <redacted>
---
 .../devicetree/bindings/pwm/pwm-stm32.txt          | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/pwm-stm32.txt

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt
new file mode 100644
index 0000000..36263f0
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32.txt

@@ -0,0 +1,37 @@
+STMicroelectronics PWM driver bindings for STM32
+
+Must be a sub-node of STM32 general purpose timer driver
+
+Required parameters:
+- compatible:		Must be "st,stm32-pwm"
+- pinctrl-names: 	Set to "default".
+- pinctrl-0: 		List of phandles pointing to pin configuration nodes
+			for PWM module.
+			For Pinctrl properties, please refer to [1].
+
+Optional parameters:
+- st,breakinput:	Set if the hardware have break input capabilities
+- st,breakinput-polarity: Set break input polarity. Default is 0
+			 The value define the active polarity:
+			  - 0 (active LOW)
+			  - 1 (active HIGH)
+- st,pwm-num-chan:	Number of available PWM channels.  Default is 0.
+- st,32bits-counter:	Set if the hardware have a 32 bits counter
+- st,complementary:	Set if the hardware have complementary output channels